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cyw20702 single-chip bluetooth transceiver and baseband processor cypress semiconductor corporation ? 198 champion court ? san jose , ca 95134-1709 ? 408-943-2600 document number: 002-14773 rev. *l revised wednesday, november 23, 2016 the cyw20702 is a monolithic, single-chip, bluetooth 4.0 compli ant, stand-alone baseband proce ssor with an integrated 2.4 ghz transceiver. manufactured using the industr y's most advanced 65 nm cmos low-power process, the cyw20702 employs the highest level of integration, eliminatin g all critical external components, and thereby minimizing the device?s footprint and costs ass ociated with the implementation of bluetooth solutions. the cyw20702 is the optimal solution for vo ice and data applications that require a bluetooth sig standard host controller inte rface (hci) via usb, uart h4 or h5, and pcm audio interface suppor t. the cyw20702 radio transceiver?s enhanced radio performance meets the most stringent industrial temper ature application requirements for compact integration into mobile handset and portab le devices. the cyw20702 is fully compatible with all standard tcxo frequencies and provides fu ll radio compatibility, enabling it to operate simultaneously with gps and cellular radios. this document provides engineering design information for t he cyw20702, a single-chip bluetooth transceiver and baseband processor that provides a complete lower layer bluetooth protoc ol stack. the cyw20702 supports bluetooth 4.0, which includes support for enhanced data rates (2 mbps and 3 mbps) and low energy (le) connections. the information provided is intended for hardware design engine ers who will be incorporating the cyw20702 into their designs. cypress part numbering scheme cypress is converting the acquired iot part nu mbers from broadcom to the cypress part numbering scheme. due to this conversion, there is no change in form, fit, or functi on as a result of offering the device with cypress part number marking. the table pro vides cypress ordering part number that matches an existing iot part number. features bluetooth 4.0 + edr and low energy compliant class 1 capable with built-in pa programmable output power cont rol meets class 1, class 2, or class 3 requirements use supply voltages up to 5.5v supports broadcom smartaudio?, wide-band speech, sbc codec, and packet loss concealment. fractional-n synthesizer supports frequency references from 12 mhz to 52 mhz automatic frequency detection for standard crystal and tcxo values when an external 32.768 khz reference clock is provided. ultra-low power consumption supports serial flash interfaces available in a 50-ball fpbga package. arm7tdmi-s??based micropro cessor with integrated rom and ram supports mobile and pc applications without external memory a usb hub table 1. mapping table for part number between broadcom and cypress broadcom part number cypress part number bcm4325 cyw4325 bcm4329 CYW4329 bcm4330 cyw4330 bcm20702 cyw20702 bcm20702a1kwfbg cyw20702a1kwfbg bcm20702b0kwfbg cyw20702b0kwfbg
document number: 002-14773 rev. *l page 2 of 55 cyw20702 applications desktop and laptop personal computers computer peripheral devices (p cmcia cards, cf cards, and usb dongles) personal digital assistants automotive telematic systems figure 1. system block diagram microprocessor ? and ? memory ? unit ? (upu) bluetooth ? baseband ? core ? (bbc) high \ speed ? peripheral ? transport ? unit ? (ptu) radio ? transceiver tcxo lpo pcm/i 2 s usb uart/spi gpio spi ? master bsc cyw20702
document number: 002-14773 rev. *l page 3 of 55 cyw20702 contents 1. overview ........................................................................ 4 1.1 major features ...................................................... 4 1.2 block diagram ....................................................... 6 1.3 usage model ......................................................... 7 2. integrated radio transceiver ...................................... 8 2.1 transmitter path .................................................... 8 2.2 receiver path ........................................................ 8 2.3 local oscillator generation ................................... 8 2.4 calibration ............................................................. 8 2.5 internal ldo .......................................................... 9 3. bluetooth baseband core ... .............. .............. .......... 10 3.1 transmit and receive functions ......................... 10 3.2 bluetooth 4.0 + edr features ............................ 10 3.3 frequency hopping generator .......... ........... ....... 10 3.4 link control layer ............................................... 10 3.5 test mode support ........... .............. .............. ....... 11 3.6 power management unit ..................................... 11 3.7 adaptive frequency hoppin g .............................. 13 3.8 collaborative coexistence ................................... 13 3.9 serial enhanced coexistence interface .............. 14 4. microprocessor unit ................................................... 15 4.1 overview ............................................................. 15 4.2 nvram configuration data and storage ............ 15 4.3 eeprom ...... ............... ........... ........... ........... ....... 15 4.4 external reset ..................................................... 15 4.5 one-time programmable memory ...................... 16 5. peripheral transport unit .......................................... 17 5.1 pcm interface ..................................................... 17 5.2 hci transport detection configuration ............... 19 5.3 usb interface ...................................................... 19 5.4 uart interface .................................................... 21 5.5 spi ....................................................................... 22 5.6 simultaneous uart transport and bridging ...... 22 6. frequency references ............................................... 23 6.1 crystal interface and clock generation .............. 23 6.2 crystal oscillator...................................................... 24 6.3 external frequency refere nce ............................ 24 6.4 frequency selection ............................................ 25 6.5 frequency trimming ........................................... 25 6.6 lpo clock interface ............................................ 26 7. pin-out and signal descriptions ............................... 27 7.1 pin descriptions .................................................. 27 8. ball grid arrays .......................................................... 29 9. electrical characteristics ........................................... 30 9.1 rf specifications ................................................ 36 9.2 timing and ac characteri stics ............................ 39 9.3 electrostatic discharge . ....................................... 48 10. mechanical information ........................................... 50 10.1 tape, reel, and packing specification .............. 51 11. ordering information ................................................ 52 12. acronyms and abbreviations .................................. 52 13. iot resources ........................................................... 52 document history ........................................................... 53 sales, solutions, and legal information ...................... 55
document number: 002-14773 rev. *l page 4 of 55 cyw20702 1. overview the cyw20702 complies with bluetooth core s pecification, version 4.0 and is designed for use in standard host controller interf ace (hci) uart and hci usb applications. the co mbination of the bluetooth baseband core ( bbc), a peripheral transport unit (ptu), and an arm ? -based microprocessor with on-chip rom provides a complete lower layer bluetooth protocol stack, including the link controller (lc), link manager (lm), and hci. 1.1 major features major features of the cyw20702 include: support for bluetooth 4.0 + edr and low energy (le), including the following options: ? a whitelist size of 25. ? enhanced power control ? hci read encryption key size command full support for bluetooth 2.1 + edr additional features: ? secure simple pairing (ssp) ? encryption pause resume (epr) ? enhance inquiry response (eir) ? link supervision time out (lsto) ? sniff subrating (ssr) ? erroneous data (ed) ? packet boundary flag (pbf) built-in low drop-out (ldo) regulators (2) ? 1.63 to 5.5v input voltage range ? 1.8 to 3.3v intermediate programmable output voltage integrated rf section ? single-ended, 50 ohm rf interface ? built-in tx/rx switch functionality ? tx class 1 output power capability ? rx sensitivity basic rate of ?88 dbm ? rx sensitivity for low energy of ?92 dbm supports maximum bluetooth data rates over hci uart, usb, and spi interfaces multipoint operation, with up to 7 active slaves ? maximum of 7 simultaneous active acl links ? maximum of 3 simultaneous active sco an d esco links, with scatternet support scatternet operation, with up to 4 active piconet s (with background scan and support for scattermode) high-speed hci uart transport support ? h4 five-wire uart (four signal wires, one ground wire) ? h5 three-wire uart (two signal wires, one ground wire) ? maximum uart baud rates of 4 mbps ? low-power out-of-band bt_wake and host_wake signaling ? vsc from host transport to uart ? proprietary compressing scheme (allows more than 2 simultaneous a2dp packets and up to 5 devices at a time) hci usb transport support ? usb version 2.0 full-speed compliant interface ? full usb hub ? uhe (proprietary method for emulating a hum an interface device (hid) at system bootup)
document number: 002-14773 rev. *l page 5 of 55 cyw20702 channel quality-driven data rate (cqddr) and packet type selection standard bluetooth test modes extended radio and produc tion test mode features full support for power savings modes: ? bluetooth standard sniff ? deep sleep modes and regulator shutdown supports wide-band speech (wbs) over pcm and packe t loss concealment (plc) for better audio quality 2-, 3-, and 4-wire coexistence power amplifier (pa) shutdown for externally controlled coexistence, such as wimax built-in lpo clock or operation using an external lpo clock tcxo input and auto-detection of all stand ard handset clock frequencies (supports low- power crystal, which can be used during power saving mode with better timing accuracy) or gate for combining a host clock request with a bluetooth clock request (operates even when the bluetooth core logic is power ed off) larger patch ram space to support future enhancements serial flash interface with native support for devices from several manufacturers one-time programmable (otp) memory
document number: 002-14773 rev. *l page 6 of 55 cyw20702 1.2 block diagram figure 2 shows the interconnect of the ma jor cyw20702 physical blocks and associated external interfaces. figure 2. functional block diagram arm7tdmi \ s dma scan ? jtag address ? decoder bus ? arb trap ? & ? patch ahb2apb wd ? timer remap ? & ? pause 32 \ bit ? apb 32 \ bit ? ahb ahb2mem ahb2ebi external ? bus ? i/f rom ahb2mem ram pmu ? control uart debug ? uart ptu i/o ? port ? control pmu lpo por buffer apu bt ? clk/ hopper blue ? rf ? i/f rx/tx buffer digital ? modulator calibration ? & ? control digital ? demod ? bit ? sync bluetooth ? radio rf flash ? i/f jtag digital ? i/o spi ? transport i2c_master interrupt ? controller pcm usb gpio+aux sw ? timers jtag ? master lcu fifo ? 1 fifo ? 2 otp (128 ? bytes) spi ? master seci coex low ? power ? scan blue ? rf ? registers
document number: 002-14773 rev. *l page 7 of 55 cyw20702 1.3 usage model this section contains information on the ? pc product usage model ?. 1.3.1 pc product usage model the cyw20702 can be directly interfaced usi ng the hci usb interface, pr oviding full support for embedded usb applications like laptops and pc motherboards. the cyw20 702 also supports pc applications as an external usb dongle peripheral device. figure 3 shows an example of a pc product usage model. figure 3. pc product usage model host pc flash memory cyw20702 ieee 802.11? wlan usb optional/status bt_busy/tx_req wifi_busy/tx_confirm link_ind 20 mhz crystal oscillator serial interface vdd_usb
document number: 002-14773 rev. *l page 8 of 55 cyw20702 2. integrated radio transceiver the cyw20702 has an integrated radio transce iver that has been optimized for use in 2.4 ghz bluetoot h wireless systems. it has been designed to provide low-power, low-cost, robust communicati ons for applications operating in the globally available 2.4 ghz unlicensed ism band. the cyw20702 is fully compliant with the bluetooth radio specif ication and enhanced data rate specificatio n and meets or exceeds the requirements to provide the highest communication link quality of service. 2.1 transmitter path the cyw20702 features a fully integrated zero if transmitter. the baseband transmitted data is digitally modulated in the modem block and up-converted to the 2.4 ghz ism band in the transmitter pa th. the transmitter path consists of signal filtering, i/q u p- conversion, a high-output power amplifier (pa), and rf filtering. the cyw20702 also incorporates modulation schemes to support enhanced data rates. p/4-dqpsk for 2 mbps 8-dpsk for 3 mbps 2.1.1 digital modulator the digital modulator performs the data modu lation and filtering required for the gfsk, ? /4dqpsk, and 8-dpsk signals. the fully digital modulator minimizes any frequency drift or anomalies in th e modulation characteristics of the transmitted signal and is much more stable than direct vco modulation schemes. 2.1.2 power amplifier the cyw20702 integrated pa can be configured for class 2 operation, transmitting up to +4 dbm. the pa can also be configured fo r class 1 operation, transmitting up +10 dbm at the chip in gfsk mode , when a minimum supply voltage of 2.5v is applied to vddtf. because of the linear nature of the pa, combi ned with integrated filtering, minimal ex ternal filtering is required to meet blue tooth and regulatory harmonic and spurious requirements. using a highly linearized, temperature comp ensated design, the pa can transmit +10 dbm for basic rate and +8 dbm for enhanced data rates (2 to 3 mbps). a flexible supply voltage range allows the pa to operate from 1.2v to 3.3v. a minimum supply voltage of 2.5v is required at vddtf to ac hieve +10 dbm of transmit power. 2.2 receiver path the receiver path uses a low if scheme to downconvert the re ceived signal for demodulation in the digital demodulator and bit synchronizer. the receiver path provides a high degree of linear ity, an extended dynamic range, and high order on-chip channel filtering to ensure reliable operation in the noisy 2.4 ghz is m band. the front-end topology, with built-in out-of-band attenuat ion, enables the device to be used in most applications without off-ch ip filtering. for integrated han dset operation where the bluet ooth function is integrated close to the cellula r transmitter, minimal external filtering is required to elimin ate the desensitizati on of the receiver by the cellular transmit signal. 2.2.1 digital demodulator and bit synchronizer the digital demodulator and bit synchronizer uses the low if received signal to perform an optimal frequency tracking and bit s ynchro- nization algorithm. 2.2.2 receiver signal strength indicator the cyw20702 radio provides a receiver si gnal strength indicator (rssi) signal to the baseband so that the controller can take part in a bluetooth power-controlled link by providin g a metric of its own receiver signal strength to determine whether the transmi tter should increase or decrease its output power. 2.3 local oscillator generation local oscillator (lo) generation provides fast frequency hopping (1600 hops/second) across the 79 maximum available channels. the lo generation subblock employs an architecture for high immuni ty to lo pulling during pa operation. the device uses fully- integrated pll loop filters. 2.4 calibration the radio transceiver features an automated calibration scheme that is fully self-contain ed in the radio. user interaction is n ot required during normal operation or during manufacturing to provide the optimal performance. calibration optimizes the performance of al l major blocks in the radio, including gain and phase characteristi cs of filters, matching between key components, and key gain b locks. calibration, which takes process and temperat ure variations into account, occurs trans parently during the settling time of the hops, adjusting for temperature variations as the device cools and heats during normal operation.
document number: 002-14773 rev. *l page 9 of 55 cyw20702 2.5 internal ldo two internal low drop-out (ldo) voltage regulators eliminate the need for external voltage regul ators and therefore reduce the bom. the first ldo is a preregulator (hv ldo). the second ldo (main ldo) supplies the main power to the cyw20702 (see figure 4 ). the hv ldo has an input voltage range of 2. 3v to 5.5v. the input vbat is ideal for batteries. the vreghv output is programmable from 1.8v to 3.3v, in 100 mv steps. the dropout voltage is 200 mv. the hv ldo can supply up to 95 ma, which leaves spare power for external circuitry such as an rf power amp for higher transmit power. if the hv ldo is not used , to turn off the hv ldo and minimize current consumption, connect the vbat input to the vreghv output. firmware can then disable the hv ldo, saving the quiescent current. the hv ldo default output voltage is 2.9v, allowing this regulator to be used to power external nv memory devices, as well as t he vddo rail. the firmware can then adjust this output to as low as 1.8v, if desired, to power vddtf. the main ldo has a 1.22v output (vreg) and is used to supply main power to the cyw20702. the input of this ldo (vreghv) has an input voltage range of from 1.63v to 3.63v. the output of the hv ldo is inter nally connected to the input to the main ld o. power can be applied to vreghv when the hv ldo is not used. the main ldo supplies power to the entire device for class 2 operation. the main ldo can drive up to 60 ma, which leaves sp are power for external circuitry. the main ldo is bypassed by not connecting anything to its output (vreg) and driving 1.12v?1.32v directly to vddc and vddrf. reg_en provides a control signal for the host to control power to the cyw20702. when power is enabled, the cyw20702 will requir e complete initialization. figure 4. ldo functional block diagram hv ldo main ldo vreghv vbat vreg reg_en cyw20702
document number: 002-14773 rev. *l page 10 of 55 cyw20702 3. bluetooth baseband core the bluetooth baseband core (bbc) implement s the time critical functions required fo r high-performance bluetooth and low energy operation. the bbc manages buffering, segment ation, and data routing for all connections. it also buffers data that passes thro ugh it, handles data flow control, schedules sco/acl tx/rx transa ctions, monitors bluetooth slot usage, optimally segments and packages data into baseband packets, manages connection status i ndicators, and composes and decodes hci packets. in addition to these functions, it independently handle s hci event types and hci command types. 3.1 transmit and receive functions the following transmit and receive functions are implemented in t he bbc hardware to increase the reliability and security of th e tx/rx data before sending the data over the air: in the transmitter: data framing forward error correction (fec) generation header error control (hec) generation cyclic redundancy check (crc) generation key generation data encryption data whitening in the receiver: symbol timing recovery data deframing fec hec crc data decryption data dewhitening 3.2 bluetooth 4.0 + edr features the cyw20702 supports bluetooth 4.0 + edr and low energy, including the following options: a whitelist size of 25 enhanced power control hci read encryption key size command the cyw20702 provides full support for bl uetooth 2.1 + edr a dditional features: secure simple pairing (ssp) encryption pause resume (epr) enhance inquiry response (eir) link supervision time out (lsto) sniff subrating (ssr) erroneous data (ed) packet boundary flag (pbf) 3.3 frequency hopping generator the frequency hopping sequence generator selects the correct hopping channel number, based on the link controller state, blueto oth clock, and device address. 3.4 link control layer the link control layer is part of the blue tooth link control functions im plemented in dedicated logic in the link control unit (lcu). this layer consists of the command controller that takes comm ands from the software and other controllers that are activated or configured by the command controll er to perform the link control tasks. there are two major states?standby and con nection. each task establishes a different st ate in the bluetooth link controller. in addition, there are eight substates?page, page scan, inquiry, inquiry scan, sniff, and sniff subrating.
document number: 002-14773 rev. *l page 11 of 55 cyw20702 3.5 test mode support the cyw20702 fully supports bluetooth test mode. in addition to the standard bluetooth test mode, the device supports enhanced testin g features to simplify rf debugging and qua li- fication and type approval testing. these test features include: fixed frequency carrier wave (unmodulated) transmission ? simplifies some type approval measurements (japan) ? aids in transmitter performance analysis fixed frequency constant receiver mode ? directs receiver output to i/o pin ? allows for direct ber measurements using standard rf test equipment ? facilitates spurious emissions testing for receive mode fixed frequency constant bit stream transmission ? unmodulated, 8-bit fixed pattern, prbs-9, or prbs-15 ? enables modulated signal measurem ents with standard rf test equipment packetized connectionless transmitter test ? hopping or fixed frequency ? multiple packet types supported ? multiple data patterns supported packetized connectionless receiver test ? fixed frequency ? multiple packet types supported ? multiple data patterns supported 3.6 power management unit the power management unit (pmu) provides power management features that can be in voked through power management registers or packet handling in the baseband core. this section contains descriptions of the pmu features. 3.6.1 rf power management the bbc generates power-down control signals for the transmit path, receive path, pll, and power amplifier to the 2.4 ghz trans - ceiver. the transceiver then processes the power-down functions, accordingly. 3.6.2 host controller power management the host can place the device in a sleep state, in which all nonessential blocks ar e powered off and all nonessential clocks ar e disabled. power to the digital core is maintained so that the state of the registers and ram is not lost. in addition, the lpo clock is applied to the internal sleep controller so that the chip can wa ke automatically at a specified time or based on signaling from the host. the goal is to limit the current consumption to a minimum, while maintaining t he ability to wake up and resume a connection wit h minimal latency. if a scan or sniff session is enabled while the device is in sleep mode, the device automatically will wake up for the scan/sni ff event, then go back to sleep when the event is done. in this case, the device uses its internal lpo-based timers to trigger the period ic wake up. while in sleep mode, the transports are idle. however, the host can signal the device to wake up at any time. if signaled t o wake up while a scan or sniff session is in progress, the session co ntinues but the device will not sleep between scan/sniff events. once sleep mode is enabled, the wake signaling mechanism can also be thought of as a sleep signaling mechanism, since removing the wake status will often ca use the device to sleep. in addition to a bluetooth device wake signaling mechanism, ther e is a host wake signaling mechanism. this feature provides a w ay for the bluetooth device to wake up a host that is in a reduced power state. there are three mechanisms for the device and t he host to signal wake status to each other: usb: when running in usb mode, the device supports the usb ve rsion 2.0 full-speed specification, suspend/resume signaling, as well as remote wake-up signaling for power control. bluetooth wake (bt_wake) and host wake (and host_wake) signaling: the bt_wake pin (gpio_0) allows the host to wake the bt device, and host_wake (gpio_1) is an output that allows the bt device to wake the host. in-band uart signaling: the cts and rts signals of the uart interface are used for bt wake (cts) and host wake (rts) functions in addition to their normal function on the uart inte rface. note that this applie s for both h4 and h5 protocols.
document number: 002-14773 rev. *l page 12 of 55 cyw20702 when running in spi mode, the cyw20702 has a mode where it ente rs sleep mode when there is no activity on the spi interface for a specified (programmable) amount of time. idle mode is detect ed when the spi_csn is left deasse rted. whether to sleep on an id le interface and the amount of time to wait before entering sleep mode can be program ed by the host. once the cyw20702 enters sleep, the host can wake it by asserting spi_csn. if the host decides to sleep, th e cyw20702 will wake up the host by asserting spi_int when it has data for it. note: successful operation of the power manag ement handshaking signals requires coordinated support between the device firmware and the host software. 3.6.3 bbc power management the device provides the following low-power operations for the bbc: physical layer packet handling turns rf on and off dynamically within packet tx and rx. bluetooth specified low-power co nnection mode (sniff). while in this low-power connection mode, the device runs on the low power oscillator and wakes up after a predefined time period. table 2. power co ntrol pin summary pin direction description bt_wake (gpio_0) host output bt input bluetooth device wake-up: signal from the host to the bluetooth device that the host requires attention. asserted = bluetooth device must wake up or remain awake. deasserted = bluetooth device may sleep when sleep criteria are met. the polarity of this signal is software configur able and can be asserted high or low. by default, bt_wake is active-low (if bt-wake is low it requires the device to wake up or remain awake). for usb applications, this can be used for setting airport mode (radio disable mode). host_wake (gpio_1) bt output host input host wake-up. signal from the bluetooth device to the host indicating that bluetooth device requires attention. asserted = host device must wake up or remain awake. deasserted = host device may sleep when sleep criteria are met. the polarity of this signal is software configurable and can be asserted high or low. clk_req (gpio_5) bt output clock request asserted = external clock reference required deasserted = external clock reference may be powered down for the cyw20702a1kwfbg, the polarity of clk_req is active low. reg_en bt input enables the internal preregulator an d main regulator outputs. reg_en is active-high. 1 = enabled 0 = disabled
document number: 002-14773 rev. *l page 13 of 55 cyw20702 3.6.4 backdrive protection the cyw20702 provides a backdrive protection feature that allows the device to be turned off while the host and other devices i n the system remain operati onal. when the device is no t needed in the system, v dd_rf and vddc are shut down and vddo remains powered. this allows the device to be effectively off, while ke eping the i/o pins powered so that they do not draw extra curren t from other devices connected to the i/o. note: vdd_rf collectively refers to the vddtf, vddif, vddlna, vddpx, and vddrf rf power supplies. note: never apply voltage to i/o pins if vddo is not applied. during the low power shutdown state and as long as vddo remains applied to the device , all outputs are tristated and all digita l and analog clocks are disabled. input voltages must remain within t he limits defined for normal operatio n. this is done to either p revent current draw and back loading on digital signals in the system. it also enables the device to be fully integrated in an embedde d device and take full advantage of the lowest power savings modes. if v ddc is powered up externally (not connected to vreg), vddc requires 750k ohms to ground during low-power shutdown. if v ddc is powered up by vreg, vddc does not require 750k ohms to ground because the internal main ldo has about 750 k ohms to ground when turned off. several signals, including the frequency reference input (xtal_in ) and external lpo input (lpo_in), are designed to be high- impedance inputs that will not load down the driving signal, even if vddo power is not applied to the chip. the other signals w ith back drive prevention are rst_n, coex_in, pcm_sync, pcm_clk, pcm_out, pcm_in , uart_rts_n, uart_cts_n, uart_rxd, uart_txd, gpio_0, gpio_1, gpio_4, gpio_7, husb_dp, husb_dn, cfg_sel, and otp_dis. all other i/o signals must remain at vss until vddo is app lied. failing to do this can resu lt in unreliable startup behavior. when powered on, using reg_en is the same as applying power to the cyw20702. the device does not have information about its state before being powered-down. 3.7 adaptive frequency hopping the cyw20702 supports host channel classification and dynamic channel classification adaptive frequency hopping (afh) schemes, as defined in t he bluetooth specification. host channel classification enables the host to set a predefined hopping map for the device to follow. if dynamic channel classification is enabled, the device gathers link quality statistics on a channel-by-channel basis to facil itate channel assessment and channel map selection. to provide a more accura te frequency hop map, link quality is determined using both rf an d baseband signal processing. 3.8 collaborative coexistence the cyw20702 provides extensions and collaborative coexistence to the standard bluetooth afh fo r direct communication with wlan devices. collaborative coexistence enables wlan and bluet ooth to operate simultaneously in a single device. the device supports industry-standard coexistence si gnaling, including 802.15.2, and supports broadcom and third-party wlan solutions. using a multitiered prioritization approach, relative priorities between data types and applicatio ns can be set. this approach maximizes the performance-wlan data throughput vs. voice quality vs. link performance. a pa shutdown pin is available to allow full external control of the rf output for other types of coexistence, such as wimax.
document number: 002-14773 rev. *l page 14 of 55 cyw20702 3.9 serial enhanced coexistence interface the serial enhanced coexistence interface (serial eci or seci) is a proprietary cypress interface between cypress wlan devices and bluetooth devices. it is an optional replacement to the lega cy 3- or 4-wire coexistence feat ure, which is also available. the following key features are associated with the interface: enhanced coexistence data can be exchanged over a two-wire interface, one serial in put (seci_in), and one serial output (seci_out). the pad configuration register s must be programmed to choose the digi tal i/o pins that serve the seci_in and seci_out function. it supports generic uart communicati on between wlan and bluetooth devices. to conserve power, it is disabled when inactive. it supports automatic resynchronizaton upon waking from sleep mode. it supports a baud rate of up to 4 mbps. 3.9.1 seci advantages the advantages of the seci over the le gacy 3-wire coexistence interface are: only two wires are required: seci_in and seci_out. up to 48-bits of coexistence data can be exchanged. previous cypress standalone blueto oth devices such as the bcm2070 supported only a 3-wire or 4-wire coexistence interface. previous cypress wlan and bluetooth combination devices such as the cyw4325, CYW4329, and cyw4330 support an internal parallel enhanced coexistence interface for more efficient wl an and bluetooth information exchange. the seci allows enhanced coexistence information to be passed to a companion cypress wlan chip through a serial interface using fewer i/o than the 3-wir e coexistence scheme. the 48-bits of the seci significantly enhance wlan and bluetooth coexistence by sharing such information as frequencies used an d radio usage times. the exact contents of the seci are cypress confidential. 3.9.2 seci i/o the cyw20702 does not have dedicated seci_in or seci_out pins, but the two pin functions can be mapped to the following digital i/o: the uart, gpio, spi master (or bsc), pcm, and coex pins. pin f unction mapping is controlled by the config file that is eit her stored in nvram or downloaded directly into on-chip ram from the host.
document number: 002-14773 rev. *l page 15 of 55 cyw20702 4. microprocessor unit 4.1 overview the cyw20702 microprocessor unit runs software from the link cont rol (lc) layer up to the host controller interf ace (hci). the microprocessor is based on the arm7tdmis 32-bit risc proce ssor with embedded ice-rt debug and jtag interface units. the microprocessor also includes 384 kb of rom memory for program storage and boot rom, 112 kb of ram for data scratch-pad, and patch ram code. the internal boot rom provides flexibility during power-on reset to enable the same device to be used in various configurations , including automatic host transport selection from spi, usb, or ua rt, with or without external nvra m. at power-up, the lower lay er protocol stack is executed from the internal rom. external patches can be applied to the rom-based firmware to pr ovide flexibility for bug fixes and features additions. these pa tches can be downloaded from the host to the devic e through the spi, usb, or uart transports, or using external nvram. the device can also support the integration of us er applications and profiles using an external serial flash memory. 4.2 nvram configuration data and storage 4.2.1 serial interface the cyw20702 includes an spi master controller that can be used to access serial flash memory. the spi master contains an ahb slave interface, transmit and receive fifos, and the spi core phy logic. data is transferred to and from the module by the syst em cpu. dma operation is not supported. the cyw20702 supports seri al flash vendors atmel?, mxic, and numonyx?. the most commonly used parts from two of these vendors are: at25bcm512b, manufactured by atmel mx25v512zui-20g, manufactured by mxic 4.3 eeprom the cyw20702 includes a broadcom serial control (bsc) master interface. the bsc interface su pports low-speed and fast mode devices and is compatible with i 2 c slave devices. multiple i 2 c master devices and flexible wait st ate insertion by the master interface or slave devices are not supported. the cyw 20702 provides 400 khz, full speed clock support. the bsc interface is programmed by the cpu to gene rate the following bsc transfer types on the bus: read-only write-only combined read/write combined write-read nvram may contain configuration information about the customer applicatio n, including the following: fractional-n information bd_addr uart baud rate usb enumeration information sdp service record file system information used fo r code, code patches, or data 4.4 external reset the cyw20702 has an integrated power-on reset circuit which complete ly resets all circuits to a kn own power on state. this acti on can also be driven by an external reset signal, which can be us ed to externally control the device, forcing it into a power-on reset state. the rst_n signal input is an active-low signal for all versions of the cyw20702. the cyw20702 requires an external pull-up resi stor on the rst_n input. alternatively, the rst_n input can be co nnected to reg_en or driven directly by a host gpio.
document number: 002-14773 rev. *l page 16 of 55 cyw20702 4.5 one-time programmable memory the cyw20702 includes a one-time programmable (otp) memory , allowing manufacturing customization and avoiding the need for an on-board nvram.if customization is not required, then the otp does not need to be programmed. whether the otp is programmed or not, it is disabled after th e boot process completes to save power. the otp size is 128 bytes. the otp is designed to store a minimal amount of information. aside from otp data, most user configuration information will be downloaded into ram after the cyw20702 boots up and is ready for ho st transport communication. th e otp contents are limited to: parameters required prior to downloading user configuration to ram. parameters unique to each part and each customer (i.e., the bd_addr, software license key, and usb pid/vid). the otp memory is particularly useful in a pc design with usb transport capability because: some customer-specific information must be configured before enumerating the part on the usb transport. part or customer unique information (bd_addr, software lic ense key, and usb pid/vid) do not need to be stored on the host system. 4.5.1 contents the following are typical parameters programmed into the otp memory: bd_addr software license key usb pid/vid usb bus/self-powered status output power calibration frequency trimming initial status led drive configuration the otp contents also include a static error correction table to improve yield during the programming process as well as forwar d error correction codes to eliminate any long-term reliability problems. the otp contents as sociated with error correction are not vis ible by customers. 4.5.2 programming otp memory programming takes place through a combination of cy press software integrated with the manufacturing test software and code embedded in cyw20702 firmware. programming the otp requires a 3.3v supply. the otp programming supply comes from the vdd_usb pin. for applications where the otp is most useful, such as the usb transport application for the pc market, the 3.3v is already required for usb operation from the vdd_usb pin. the otp power supply is allowed to be as low as 1.8 v to be able to read the contents. see table 3 for the otp memory programming supply voltage requirements. the otp is enabled by default by setting otp_dis to low using an internal pull-down resistor. leave this pin floating for a def ault configuration. to disable the otp, set the otp_dis pin to active high. this pin can be configured from the hw to enable or disa ble otp. typically it won?t be necessary to disable the otp memory, even if it is not programmed during ma nufacturing. the otp_dis packa ge ball only needs to be tied to high if recommended by cypress. table 3. otp programming supply voltage requirements a a. the average and peak current consumpt ions during otp memory programming are 20 ma and 70 ma, respectively. supply minimum b b. contact your cypress representative for recommended minimum and maximum supply voltages. typical maximum b unit vdd_usb tbd tbd tbd v
document number: 002-14773 rev. *l page 17 of 55 cyw20702 5. peripheral transport unit this section discusses the pcm, usb, uart, and spi peripheral interfaces. the cyw20702 has a 104 0 byte transmit and receive fifo, which is large enough to hold the entire payload of the largest edr bt packet (3-dh5). 5.1 pcm interface the cyw20702 pcm interface can connect to linear pcm codec devic es in master or slave mode . in master mode, the device generates the pcm_bclk and pcm_sync signals. in slave mode, these signals are provided by another master on the pcm interface as inputs to the device. the device supports up to three sco or esco channels thro ugh the pcm interface and each channel can be independently mapped to any available slot in a frame. the host can adjust the pcm interf ace configuration using vendor-specific hci comm ands or it can be setup in the configuration file. 5.1.1 system diagram figure 5 shows options for connecting the device to a pcm codec device as a master or a slave. figure 5. pcm interface with linear pcm codec pcm interface slave mode pcm codec (master) cyw20702 (slave) pcm_in pcm_bclk pcm_sync pcm_out pcm interface master mode pcm codec (slave) cyw20702 (master) pcm_in pcm_bclk pcm_sync pcm_out pcm interface hybrid mode pcm codec (hybrid) cyw20702 (hybrid) pcm_in pcm_bclk pcm_sync pcm_out
document number: 002-14773 rev. *l page 18 of 55 cyw20702 5.1.2 slot mapping the device supports up to three simultaneous, full-duplex sco or esco channels. these channels are time-multiplexed onto the pcm interface using a time slotting scheme based on the audio sampling rate, as described in ta b l e 4 . transmit and receive pcm data from an sco channel is always mappe d to the same slot. the pcm data output driver tri-states its output on unused slots to allow other devices to share the same pcm interface signals. the data output driver tri-states its ou tput after the falling edge of the pcm clock during the last bit of the slot. 5.1.3 wideband speech the cyw20702 provides support for wideband speech (wbs) in two ways: transparent mode: the host encodes wbs packets and the encoded packets are transferred over the pcm bus for sco or esco voice connections. in transparent mode, the pcm bus is typically configured in master mode for a 4 khz sync rate with 16-bit samples, resulting in a 64 kbps bit rate. on-chip smartaudio? technology: the cyw20702 can perform subband-codec (sbc) encoding and decoding of linear 16 bits at 16 khz (256 kbps rate) transferred over the pcm bus. 5.1.4 frame synchronization the device supports both short and long frame synchronization types in both master and slave co nfigurations. in short frame syn chro- nization mode, the frame synchronization signal is an active-high pulse at the 8 khz audio frame rate (which is a single bit per iod in width) and synchronized to the rising edge of the bit clock. th e pcm slave expects pcm_sync to be high on the falling edge of t he bit clock and the first bit of the first slot to start at the next rising edge of the clock. in the long frame synchronization mode, the frame synchronization signal is an active-high pulse at the 8 khz audi o frame rate. however, the duration is 3-bit periods and the pul se starts coincident with the first bit of the first slot. 5.1.5 data formatting the device can be configured to generate and accept several differ ent data formats. the device uses 13 of the 16 bits in each p cm frame. the location and order of these 13 bi ts is configurable to support various data formats on the pcm interface. the remain ing three bits are ignored on the input, and may be filled with zero s, ones, a sign bit, or a programmed value on the output. the d efault format is 13-bit two?s complement data, left justified, and clocked most significant bit first. table 4. pcm interface time slotting scheme audio sample rate time slotting scheme 8 khz the number of slots depends on the selected interface rate, as follows: interface rate 128 256 512 1024 2048 slot 1 2 4 8 16 16 khz the number of slots depends on the selected interface rate, as follows: i nterface rate 256 512 1024 2048 slot 1 2 4 8
document number: 002-14773 rev. *l page 19 of 55 cyw20702 5.2 hci transport detection configuration the cyw20702 supports the following interface types for the hci transport from the host: uart (h4 and h5) usb spi only one host interface can be active at a time. the firmware pe rforms a transport detect function at boot-time to determine wh ich host is the active transport. it can auto-detect uart and usb in terfaces, but the spi interface mu st be selected by strapping t he scl pin to 0. the complete algorithm is summarized as follows: 1. determine if scl is pulled low. if it is, select spi as hci host transport. 2. determine if any local nvram contains a valid configuration f ile. if it does and a transport co nfiguration entry is present, select the active transport according to entry, and t hen exit the transport detection routine. 3. look for start-of-frame (sof) on the usb interface. if it is present, select usb. 4. look for cts_n = 0 on the uart interfac e. if it is present, select uart. 5. repeat step 3 and step 4 until transport is determined. 5.3 usb interface 5.3.1 features the following usb interface features are supported: usb protocol, revision 2.0, full-speed compliant including the hub optional hub compound device with up to three device cores internal to device. bus or self-power, dynamic configuration for the hub global and selective suspend and resume with remote wakeup bluetooth hci hid, dfu, uhe (proprietary method to emulate an hid device at system bootup) integrated detach resistor 5.3.2 operation note: the usb and hci uart interfaces cannot be used simultaneously. for designs that do not use the usb interface, vdd_usb, husb_dp and husb_dn must be connected to ground. the cyw20702 can be configured to boot up as either a single u sb peripheral or a usb hub with several usb peripherals attached. as a single peripheral, the host detects a si ngle usb bluetooth device. in hub mode, the host detects a hub with one to three o f the ports already connected to usb devices (see figure 6 ). figure 6. usb compounded device configuration usb compounded device hub controller usb device 1 hid keyboard usb device 2 hid mouse usb device 3 bluetooth host
document number: 002-14773 rev. *l page 20 of 55 cyw20702 depending on the desired hub mode configuration, the cyw20702 can boot up showing the three ports connected to logical usb devices internal to the cyw20702?a generic bluetooth device, a m ouse, and a keyboard. in this mode, the mouse and keyboard are emulated devices, since they connect to real hid devices via a bluetooth link. the bluetooth li nk to these hid devices is h idden from the usb host. to the host, the mouse and /or keyboard appear to be directly connect ed to the usb port. this cypress proprie tary architecture is called usb hid emulation (uhe). the usb device, configuration, and string descriptors are fully programmable, allowing manufacturers to customize the descripto rs, including vendor and product ids, the cyw20702 uses to identify itself on the usb port. to make custom usb descriptor informati on available at boot time, stor ed it in external nvram. despite the mode of operation (single periphe ral or hub), the bluetooth device is conf igured to include the following interface s: 5.3.3 usb hub and uhe support the cyw20702 supports the usb hub and device model (usb, revision 2.0, full-speed compliant). optional mouse and keyboard devices utilize broadcom?s proprietary usb hid emulation (uhe) ar chitecture, which allows these devices appear as standalone hi d devices even though connecte d through a bluetooth link. the presence of uhe devices requires the hub to be enabled. th e cyw20702 cannot appear as a single keyboard or a single mouse device without the hub. once either mouse or keyboard uhe device is enabled, the hub must also be enabled. when the hub is enabled, the cyw20702 handles all standard usb functions for the following devices: hid keyboard hid mouse bluetooth all hub and device descriptors are firmware-programmabl e. this usb compound device configuration (see figure 6 ) supports up to three downstream ports. this configuration can also be programm ed to a single usb device core. the device automatically detects activity on the usb interface when connec ted. therefore, no s pecial configuration is needed to select hci as the transport. the hub?s downstream port definition is as follows: port 1 usb lite device core (for hid applications) port 2 usb lite device core (for hid applications) port 3 usb full device core (for bluetooth applications) when operating in hub mode, all three internal devices do not have to be enabled. each internal usb device can be optionally en abled. the configuration record in nvram de termines which devices are present. interface 0 contains a control endpoint (endpoint 0x00) fo r hci commands, a bulk in endpoint (endpoint 0x82) for receiving acl data, a bulk out endpoint (endpoint 0x02 ) for transmitting acl data, and an interrupt endpoint (endpoint 0x81) for hci events. interface 1 contains isochronous in and out endpoints (en dpoints 0x83 and 0x03) for sco traffic. several alternate interface 1 settings are available for reserving the pro per bandwidth of isochronous data (depending on the application). interface 2 contains bulk in and bulk out endpoints (endp oints 0x84 and 0x04) used fo r proprietary testing and debugging purposes. these endpoints can be ignored during normal operation.
document number: 002-14773 rev. *l page 21 of 55 cyw20702 5.4 uart interface the uart physical interface is a standard, 4-wire interface (rx, tx, rts, cts) with adjustable baud rates from 9600 bps to 4.0 mbps. the interface features an au tomatic baud rate detection capability that return s a baud rate selectio n. alternatively, the baud rate can be selected via a vendor-specific uart hci command. the interface supports bl uetooth uart hci (h4) specifications. the default baud rate for h4 is 115.2 kbaud. the following baud rates are supported: 9600 14400 19200 28800 38400 57600 115200 230400 460800 921600 144444 150000 2000000 3000000 3250000 3692000 4000000 normally, the uart baud rate is set by a configuration record downloaded after reset or by automatic baud rate detection. the h ost does not need to adjust the baud rate. support for changing the baud rate during normal hci uart operation is provided through a vendor-specific command. the cyw20702 uart operates with t he host uart correctly, provided the combined ba ud rate error of the two devices is within 2% . 5.4.1 hci 3-wire transport (uart h5) the cyw20702 supports h5 uart transport for serial uart commun ications. h5 reduces the number of signal lines required by eliminating cts and rts, when compared to h4. h5 requires the use of an external lpo. cts must be pulled low.
document number: 002-14773 rev. *l page 22 of 55 cyw20702 5.5 spi the cyw20702 supports a slave spi hci transport with an input clo ck range of up to 16 mhz. higher clock rates may be possible. the physical interface between the spi master and the cyw20702 consists of the four spi sign als (spi_csb, spi_clk, spi_si, and spi_so) and one interrupt signal (spi_int). the 20702 internal spi transport signals are multiplexed to the uart pins as fo l- lows: 20702-pin f6 --> uart_txd (miso); 20702-pin g7 --> uart_cts (spi_clk); 20702-pin e5 --> uart_rts (cs); and 20702-pin d7 --> uart_rxd (mosi). the gpio_1 is used for th e spi interrupt signal (spi_int). the cyw20702 can be config- ured to accept active-low or active-high polarity on the spi_csb chip select signal. it can also be configured to drive an acti ve-low or active-high spi_int interrupt signal. bit ordering on the spi_ si and spi_so data lines can be c onfigured as either little-endia n or big-endian. additionally, proprietary sleep mode, half-duplex handshaking is implemented betw een the spi master and the cyw20702. spi_int is required to negotiate the start of a transacti on. the spi interface does not requir e flow control in the middle of a payload. the fifo is large enough to handle the largest packet size. only the spi master can stop the flow of bytes on the data lines, s ince it controls spi_csb and spi_clk. flow control s hould be implemented in higher layer protocols. note: the 20702 pins e7, f7, g8, and e8 are used for spi serial flash access. when the spi transport detection is used, the serial flash interface may not be used because scl must be tied low. 5.6 simultaneous uart transport and bridging the cyw20702 supports uart or usb interfaces that can function as the host controller interface (hci). typi cally, a customer application would choose one of the two interfaces and the other would be idle. the cyw20702 allows the uart transport to opera te simultaneously with the usb. to operate this way, the assumpti on is that the usb would function as the primary host transport, while the uart would function as a secondary communication channel th at can operate at the same ti me. this can enable the following applications: bridging primary hci transport traffic to another device via the uart generic communication to an external device for a vendor-supported application via the uart simultaneous uart transport and bridging is enabled by including: two dedicated 64-byte fifos, one for the input and one for the output additional dma channels additional vendor-supported comm ands over the hci transport
document number: 002-14773 rev. *l page 23 of 55 cyw20702 6. frequency references the cyw20702 uses two different frequency references for norma l and low-power operational modes. an external crystal or frequency reference driven by a temperature compensated crystal oscillator (tcxo) si gnal is used to generate the radio frequenc ies and normal operation clocking. either an external 32.768 khz or fu lly integrated internal low-power oscillator (lpo) is used for low- power mode timing. 6.1 crystal interface and clock generation the cyw20702 uses a fractional-n synthesiz er to generate the radio frequencies, clo cks, and data/packet timing, enabling it to operate from any of a multitude of frequency sources. the source can be external , such as a tcxo, or a crystal interfaced direc tly to the device. the default frequency reference setting is for a 20 mhz crystal or tcxo. the signal characterist ics for the crystal interface a re listed in ta b l e 5 . table 5. crystal interface signal characteristics parameter crystal external frequency reference units acceptable frequencies 12?52 mhz in 2 ppm a steps a. the frequency step size is ap proximately 80 hz resolution. 12?52 mhz in 2 ppm a steps ? crystal load capacitance 12 (typical) n/a pf esr 60 (max) ? ? power dissipation 200 (max) ? w input signal amplitude n/a 400 to 2000 2000 to 3300 (requires a 10 pf dc blocking capacitor to attenuate the signal) mvp-p signal type n/a square-wave or sine-wave ? input impedance n/a 1 2 m ? pf phase noise @ 1 khz @ 10 khz @ 100 khz @ 1 mhz n/a n/a n/a n/a n/a ? < ?120 b < ?131 b < ?136 b < ?136 b b. with a 26 mhz reference clock. for a 13 mhz clo ck, subtract 6 db. for a 52 mhz clock, add 6 db. ? dbc/hz dbc/hz dbc/hz dbc/hz auto-detection frequencies when using external lpo c c. auto-detection of the frequency requires the crystal or exter nal frequency reference to have less than 50 ppm of variation an d also requires an external lpo frequency which has less than 250 ppm of variation at the time of detection. 12, 13, 14.4, 15.36, 16.2, 16.8, 18, 19.2, 19.44, 19.68, 19.8, 20, 24, 26, 33.6, 37.4, and 38.4 12, 13, 14.4, 15.36, 16.2, 16.8, 18, 19.2, 19.44, 19.68, 19.8, 20, 24, 26, 33.6, 37.4, and 38.4 mhz tolerance without frequency trimming d d. at-cut crystal or txco recommended. 20 20 ppm initial frequency tolerance trimming range 50 50 ppm
document number: 002-14773 rev. *l page 24 of 55 cyw20702 6.2 crystal oscillator the cyw20702 can use an external crystal to provide a frequency reference. the reco mmended configuration for the crystal oscill ator, including all external components, is shown in figure 7 . figure 7. recommended oscillator configuration 6.3 external frequency reference an external frequency reference, such as vdd_rf, collectively re fers to several rf power supplies generated by a tcxo signal th at may be directly connected to the crystal input pin on the cyw20702, as shown in figure 8 . the external frequency reference input is designed to not change loading on the tcxo when the cyw20702 is powered up or powered down. when using the cyw20702 with the txco or gate option, gpio 6 mu st be driven active high or active low. excessive leakage current results if gpio6 is allowed to float. figure 8. recommended tcxo connection 6.3.1 tcxo clock request support if the application utilizes an external tcxo as a clock reference, the cyw20702 provides a clock request output to allow the sy stem to power off the tcxo when not in use. 0 ~ 18 pf* 0 ~ 18 pf* xin xout crystal oscillator *capacitor value range depends on the manufacturer of the xtal as well as board layout. no connection tcxo xin xout 10?1000 pf* * recommended value is 100 pf. higher values produce a longer startup time. lower values have greater isolation. larger values help small signal swings.
document number: 002-14773 rev. *l page 25 of 55 cyw20702 6.4 frequency selection any frequency within the range specified for the crystal and tcxo reference can be used. these frequencies include standard han dset reference frequencies (12, 13, 14.4, 15.36, 16.2, 16.8, 18, 19.2, 19.44, 19.68, 19.8, 20, 24, 26, 33.6, 37.4, and 38.4 mhz) and any frequency between these reference frequencies, as desired by the system designer. since bit timing is derived from the referenc e frequency, the cyw20702 must have the reference frequency set corr ectly in order for any of the usb, uart, and pcm interfaces to function properly. the cyw20702 reference frequency can be set in one of the following ways. use the default 20 mhz frequency by leaving the cfg_sel pin unconnected or by strapping it high. the cfg_sel pin is internally pulled up in the cyw20702. use the 26 mhz option by setting cfg_sel low. designate the reference frequency in external nvram auto-detect the standard handset reference frequencies using an external lpo clock for pc and embedded applications where there typically won?t be an lpo clock, if autobaud is enab led, the cyw20702 will use xta l to sync up with the uart, thus allowing a user to download a firm ware configuration without having to make a crystal frequency assumption. alternatively, the cyw20702 will upload the firmware configuration from an attached nvram (if one is attached) and use it to make a crystal frequency assumption. finally, if neither of the above is true, then th e cyw20702 will look at the sta tus of the cfg_sel pin and decide whether to choose 20 or 26 mhz. autobaud is only valid for uart applications. the 20 mhz choice is only a default in t he sense that if the pin is left floating, it will be pulled up internally to support t he 20 mhz option. if the application requires a frequency other than the default, the value can be stored in an external nvram. programming the reference frequency in nvram provides the maximum flexibility in the selection of the reference frequency, since any frequency within the specified range for crystal and external frequency reference can be used. during power-on reset (por), the device downloads the parameter settings stored in nvram, which can be programmed to include the reference frequency and frequency trim values. typically, this is how a pc bl uetooth application is configured. for applications such as handsets and portab le smart communication devices, where th e reference frequency is one of the standar d frequencies commonly used, the cyw20702 autom atically detects the reference frequency and programs itself to the correct reference frequency. in order for auto-frequency detection to work properly, the cyw20702 must have a valid and stable 32.768 kh z external lpo clock present during por. this eliminates the need fo r nvram in applications where the external lpo clock is avail able and an external nvram is typically not used. 6.5 frequency trimming the cyw20702 uses a fractional-n synthesizer to digitally fine-tune the frequency reference input to within 2 ppm tuning accur acy. this trimming function can be applied to either the crystal or an external frequency source such as a tcxo. unlike the typical crystal- trimming methods used, the cyw20702 changes the frequency using a fully digital implementation and is much more stable and unaffected by crystal characteristics or te mperature. input imp edance and loading characteristics remain unchanged on the tcxo or crystal during the trimming process and are unaf fected by process and temperature variations. the option to use or not use fr equency trimming is ba sed on the system designer?s cost tr ade-off between bi ll-of-materials (bom ) cost of the crystal and the added manufacturing cost associated wi th frequency trimming. the frequency trimming value can either be stored in the host and written to the cyw20702 as a vendor-spe cific hci command or stored in nvram and subsequently recalled during por. frequency trimming is not a substitute for the poor use of tuning capacitors at an crystal oscillator (xtal). occasionally, tri mming can help alleviate hardware changes.
document number: 002-14773 rev. *l page 26 of 55 cyw20702 6.6 lpo clock interface the lpo clock is the second frequency reference that the cyw20702 uses to provide low-power mode timing for sniff. the lpo cloc k can be provided to the device externally, from a 32.768 khz so urce or the cyw20702 can operate using the internal lpo clock. the lpo can be internally driven from the main clock. however, sleep current will be impacted. the accuracy of the internal lpo limits the maximum sniff intervals. table 6. external lpo signal requirements parameter external lpo clock units nominal input frequency 32.768 khz frequency accuracy 250 ppm input signal amplitude 200 to 3600 mvp-p signal type square-wave or sine-wave ? input impedance (when power is applied or power is off) >100 <5 k ? pf
document number: 002-14773 rev. *l page 27 of 55 cyw20702 7. pin-out and signal descriptions 7.1 pin descriptions table 7. cyw20702 signal descriptions signal wfbga pin (50-ball) i/o power domain description radio res f3 o vdd_rf external calibration resistor, 15 k ? @ 1% rfp d1 i/o vdd_rf rf i/o antenna port xin g2 i vdd_rf crystal or reference input xout g3 o vdd_rf crystal oscillator output analog lpo_in b4 i vddrf external lpo input voltage regulators reg_en b2 i vddo hv ldo and main enable vbat a3 i n/a hv ldo input vreghv a2 i/o n/a hv ldo output: main ldo input vreg a1 o n/a main ldo output straps cfg_sel b8 i/o vddo this pin is floating for the 20 mhz xtal option and tied to ground for the 26 mhz xtal option. otp_dis b7 i/o vddo otp disable pin. by default, leave this pin floating. rst_n a4 i vddo active-low reset input tm0 ? i vddo clock request polarity select tm1 ? i vddo internally connected to ground tm2 e3 i vddo reserved: connect to ground. digital i/o gpio_0 b5 i/o vddo gpio/bt_wake gpio_1 b3 i/o vddo gpio/host_wake. it is also used for the spi interrupt signal (spi_int) when used as spi transport. gpio_3 d8 i/o vddo gpio/link_ind can be configured for active high or low as well as open drain. gpio_4 ? i/o vddo gpio gpio_5 f4 i/o vddo gpio/clk_req tcxo-or function out available on some packages. see section 11. ordering information . gpio_6 e4 i/o vddo gpio tcxo-or function in available on some packages. see section 11. ordering information . gpio_7 c7 i/o vddo detatch/card_detect uart_rxd d7 i/o vddo uart receive data. also mapped to the spi signal mosi. uart_txd f6 i/o vddo uart transmit data. also mapped to the spi signal miso. gpio_0 b5 i/o vddo gpio/bt_wake gpio_1 b3 i/o vddo gpio/host_wake. it is also used for the spi interrupt signal (spi_int) when used as spi transport.
document number: 002-14773 rev. *l page 28 of 55 cyw20702 uart_rts_n e5 i/o vddo uart request to send output. also mapped to the spi signal cs. uart_cts_n g7 i/o vddo uart clear to send input. also mapped to the spi signal spi_clk. scl f7 i/o vddo bsc clock. also used for serial flash access (miso). sda e7 i/o vddo bsc data. also used for serial flash access (mosi). spim_clk e8 i/o vddo serial flash spi clock spim_cs_n g8 i/o vddo serial flash active-low chip select pcm_in g6 i/o vddo pcm/i2s data input pcm_out f5 i/o vddo pcm/i2s data output pcm_clk g5 i/o vddo pcm/i2s clock pcm_sync c4 i/o vddo pcm sync/i2s word select coex_in b6 i/o vddo coexistence input usb husb_dp a8 i/o vdd_usb usb hub. if not used, connect to gnd. husb_dn a7 i/o vdd_usb if not used, connect to gnd. supplies vddif b1 i n/a radio if pll supply vddtf c1 i n/a radio pa supply vddlna e1 i n/a radio lna supply vddrf f1 i n/a radio supply vddpx g1 i n/a radio rf pll supply vddc a6 i n/a core logic supply vddc f8 i n/a core logic supply vddc ? i n/a core logic supply vddo g4 i n/a digital i/o supply voltage vddo a5 i n/a digital i/o supply voltage vddo e6 i n/a digital i/o supply voltage vdd_usb c8 i n/a usb transceiver supply voltage. if not used, connect to gnd. vss c2 ? n/a ground vss d2 ? n/a ground vss f2 ? n/a ground vss d3 ? n/a ground table 7. cyw20702 signal descriptions (cont.) signal wfbga pin (50-ball) i/o power domain description
document number: 002-14773 rev. *l page 29 of 55 cyw20702 8. ball grid arrays figure 9 shows the top view of the following array: 50-ball 4.5 x 4 x 0.8 mm (wfbga) figure 9. 4.5 x 4 x 0.8 mm (wfbga) arra y table 8. ball-out for the 50-ball wfbga 1 2 3 4 5 6 7 8 a vreg vreghv vbat rst_n vddo vddc husb_dn husb_dp b vddif reg_en gpio_1 lpo_in gpi o_0 coex_in otp_dis cfg_sel c vddtf vss ? pcm_sync ? vss gpio_7 vdd_usb d rfp vss vss ? ? ? uart_rxd gpio_3 e vddlna ? tm2 gpio_6 uart_rts_ n vddo sda spim_clk f vddrf vss res gpio_5 pcm_out uart_txd scl vddc g vddpx xin xout vddo pcm_clk pcm_in uart_cts_ n spim_cs_n g f e d c b a 12345678
document number: 002-14773 rev. *l page 30 of 55 cyw20702 9. electrical characteristics note: all voltages listed in table 9 are referenced to v dd . table 9. absolute maximum voltages rating symbol minimum typical maximum unit dc supply voltage for rf vdd_rf a a. vdd_rf collectively refers to the vddif, vddlna, vddpx, and vddrf rf power supplies. ? 1.221.32v dc supply voltage for core vddc ? 1.22 1.32 v dc supply voltage for i/o vddo b b. if vddo is not applied, voltage should nev er be applied to any digital i/o pins (i/o pins should never be driven or pulled hi gh). the list of digital i/o pins includes the followi ng (these pins are listed in section 7. pin-out and signal descriptions with vddo shown as their power domain): gpio[3], gpio[5], gpio[6] scl, sda n_mode spim_cs_n, spim_clk ?1.83.6v dc supply vddtf ? 1.12 3.3 c c. vddtf for class 2 must be connected to vreg (main ldo output). vddtf for class 1 must be connected to vreghv (hv ldo output) o r an external voltage source. refer to the cypress compatibility guide for configuration details. v voltage on input or output pin vimax, vimin v ss ? 0.3 ? vddo + 0.3 v storage temperature range tstg ?40 ? 125 c
document number: 002-14773 rev. *l page 31 of 55 cyw20702 table 10. power supply parameter symbol minimum typical maximum unit dc supply voltage for rf vdd_rf a a. vdd_rf collectively refers to the vddif, vddlna, vddpx, vddlna, vddrf rf power supplies. 1.159 1.22 1.281 v dc supply noise for rf, from 100 khz to 1 mhz vdd_rf b b. overall performance defined using integrated regulation. ? ? 150 v rms dc supply voltage for core vddc 1.159 1.22 1.281 v dc supply voltage for i/o vddo 1.7 ? 3.6 v dc supply voltage for usb vdd_usb 3.0 3.3 3.6 v dc supply vddtf c c. vddtf for class 2 must be connected to vreg (main ldo output). vddtf for class 1 must be connected to vreghv (hv ldo output) o r an external voltage source. refer to the cypress compatibility guide for configuration details. v ddtf requires a capacitor to g round. the value of the capacitor must be tuned to ensure optimal rf rx sensit ivity. typical 10 pf for bga packages and 6.2 pf for wafer package . the value may depend on board layout. 1.12 ? 3.0 d d. can be 3.3v if the output power is limited to 9 dbm. v table 11. high-voltage regulator (hv ldo) electrical specifications parameter minimum typical maximum unit input voltage 2.3 ? 5.5 v output voltage 1.8 ? 3.3 v max current load ? ? 95 ma load capacitance 1 ? 10 f load capacitor esr 0.01 ? 2 ? psrr 20 ? 40 db turn-on time (c load = 2.2 f) ? ? 200 s dropout voltage ? ? 200 mv table 12. main regulator (main ldo) electrical specifications parameter minimum typical maximum unit input voltage 1.63 ? 3.63 v output voltage 1.159 1.22 1.281 v load current ? ? 60 ma load capacitance 1 ? 2.2 f esr 0.1 ? 0.5 ? turn-on time ? ? 300 s psrr 15 ? ? db dropout voltage ? ? 200 mv
document number: 002-14773 rev. *l page 32 of 55 cyw20702 note: by default, the drive streng th settings specified in ta b l e 1 3 are for 3.3v. to achieve the required drive strength for a vddio of 2.5v or 1.8v, contact a cypress technical support representative (see ? iot resources ? for contact information). table 13. digital i/o characteristics characteristics symbol minimum typical maximum unit input low voltage (vddo = 3.3v) v il ??0.8v input high voltage (vddo = 3.3v) v ih 2.0 ? ? v input low voltage (vddo = 1.8v) v il ??0.6v input high voltage (vddo = 1.8v) v ih 1.1 ? ? v output low voltage v ol ??0.4v output high voltage v oh vddo ? 0.4v ? ? v input low current i il ??1.0 a input high current i ih ??1.0 a output low current (vddo = 3.3v, v ol = 0.4v) i ol ??3.0ma output high current (vddo = 3.3v, v oh = 2.9v) i oh ??3.0ma output low current (vddo = 1.8v, v ol = 0.4v) i ol ??3.0ma output high current (vddo = 1.8v, v oh = 1.4v) i oh ??3.0ma input capacitance c in ??0.4pf note: gpio_3/link_ind has a 10 ma ioh or iol driver current that can be used for an led. table 14. pad i/o characteristics a a. all digital i/o internal pull-up or pull-down values are around 60 k ? . this does not include the usb signals. pad name pull-up/pull-down fail-safe coex_in y y pcm_clk y y pcm_out y y pcm_in y y pcm_sync y y uart_rts_n y y uart_cts_n y y uart_rxd y y uart_txd y y gpio_0 y y gpio_1 y y gpio_4 y y gpio_7 y y rst_n n/a y usb d+ n/a y usb d- n/a y cfg_sel y n otp_dis y n
document number: 002-14773 rev. *l page 33 of 55 cyw20702 table 15. usb interface level parameter symbol minimum typical maximum unit i/o supply voltage vdd_usb 3.0 ? 3.6 v supply current icchpf ? ? 500 ma input high voltage (driven) vih 2.0 ? ? v input high voltage (floating) vihz 2.7 ? 3.6 v input low voltage vil ? ? 0.8 v differential input sensitivity vdi 0.2 ? ? v differential common-mode range vcm 0.8 ? 2.5 v output low voltage vol 0.0 ? 0.3 v output high voltage (driven) voh 2.8 ? 3.6 v output signal crossover voltage vcrs 1.3 ? 2.0 v
document number: 002-14773 rev. *l page 34 of 55 cyw20702 table 16. current consumption?class 1(10 dbm) operational mode conditions typical units receive (1 mbps) current level during receive of a basic rate packet 31 ma transmit (1 mbps) current level during transmit of a basic rate packet, gfsk output power = 10 dbm 65 ma receive (edr) current level during receive of a 2 or 3 mbps rate packet 32 ma transmit (edr) current level during transmit of a 2 or 3 mbps rate packet, gfsk output power = 10 dbm 59 ma dm1/dh1 average current during basic rate max throughput connection which includes only this packet type. 45 ma dm3/dh3 average current during basic rate max throughput connection which includes only this packet type. 46 ma dm5/dh5 average current during max basic rate throughput connection which includes only this packet type. 48 ma hv1 average current during sco voic e connection consisting of only this packet type. acl channel is in 500 ms sniff. 38 ma hv2 average current during sco voic e connection consisting of only this packet type. acl channel is in 500 ms sniff. 23 ma hv3 average current during sco voic e connection consisting of only this packet type. acl channel is in 500 ms sniff. 17 ma hci only active average current when waiting for hci command uart, usb, or spi trans- ports. 4.8 ma sleep uart transport active, external lpo clock available. 55 a sleep, hv reg bypass uart transport active , external lpo clock available, hv ldo disabled and in bypass mode. 45 a inquiry scan (1.28 sec) periodic scan rate is 1.28 sec. 350 a page scan (r1) periodic scan rate is r1 (1.28 sec). 350 a inquiry scan + page scan (r1) both inquiry and page scans are interl aced together at 1.28 sec periodic scan rate. 630 a sniff master (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. 175 a sniff slave (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. sniff master follows optimal sniff protocol of cyw20702 master. 160 a sniff (500 ms) + inquiry/ page scan (r1) same conditions as sniff master and page scan (r1). scan maybe either inquiry scan or page scan at 1.28 sec periodic scan rate. 455 a sniff (500ms) + inquiry scan + page scan (r1) same conditions as sniff master and inquiry scan + page scan. 760 a
document number: 002-14773 rev. *l page 35 of 55 cyw20702 table 17. current consumption?class 2 (3 dbm) operational mode conditions typical units receive (1 mbps) current level during receive of a basic rate packet 31 ma transmit (1 mbps) current level during transmit of a basic rate packet, gfsk output power = 3 dbm 44 ma receive (edr) current level during receive of a 2 or 3 mbps rate packet 32 ma transmit (edr) current level during transmit of a 2 or 3 mbps rate packet, gfsk output power = 3 dbm 41 ma dm1/dh1 average current during basic rate max throughput connection which includes only this packet type. 35 ma dm3/dh3 average current during basic rate max throughput connection which includes only this packet type. 36 ma dm5/dh5 average current during max basic rate throughput connection which includes only this packet type. 37 ma hv1 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 28 ma hv2 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 17 ma hv3 average current during sco voice connection consisting of only this packet type. acl channel is in 500 ms sniff. 13 ma hci only active average current when waiting for hci command uart, usb, or spi trans- ports. 4.8 ma sleep uart transport active, external lpo clock available. 55 a sleep, hv reg bypass uart transport active, external lpo clock available, hv ldo disabled and in bypass mode. 45 a inquiry scan (1.28 sec) periodic scan rate is 1.28 sec. 350 a page scan (r1) periodic scan rate is r1 (1.28 sec). 350 a inquiry scan + page scan (r1) both inquiry and page scans are interlaced together at 1.28 sec periodic scan rate. 630 a sniff master (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. 145 a sniff slave (500 ms) attempt and timeout parameters set to 4. quality connection which rarely requires more than minimum packet exchange. sniff master follows optimal sniff prot ocol of cyw20702 master. 135 a sniff (500 ms) + inquiry/ page scan (r1) same conditions as sniff master and page scan (r1). scan maybe either inquiry scan or page scan at 1.28 sec periodic scan rate. 425 a sniff (500 ms) + inquiry scan + page scan (r1) same conditions as sniff master and inquiry scan + page scan. 730 a table 18. operating conditions parameter conditions minimum typical maximum unit temperature commercial ?30.0 ? 85 c power supply rf, core 1.14 1.22 1.32 v pa supply (vddtf) reduced power level 1.14 3.0 3.3 v
document number: 002-14773 rev. *l page 36 of 55 cyw20702 9.1 rf specifications table 19. receiver rf specifications a, b parameter conditions minimum typical c maximum unit general frequency range ? 2402 ? 2480 mhz rx sensitivity d gfsk, 0.1% ber, 1 mbps ? ?89 ?85 dbm le gfsk, 0.1% ber, 1 mbps ? ?92 ?88 dbm ? /4-dqpsk, 0.01% ber, 2 mbps ? ?91 ?85 dbm 8-dpsk, 0.01% ber, 3 mbps ? ?86 ?81 dbm maximum input gfsk, 1 mbps ? ? ?20 dbm maximum input ? /4-dqpsk, 8-dpsk, 2/3 mbps ? ? ?20 dbm interference performance c/i cochannel gfsk, 0.1% ber ? ? 11 db c/i 1 mhz adjacent channel gfsk, 0.1% ber ? ? 0 db c/i 2 mhz adjacent channel gfsk, 0.1% ber ? ? ?30.0 db c/i > 3 mhz adjacent channel gfsk, 0.1% ber ? ? ?40.0 db c/i image channel gfsk, 0.1% ber ? ? ?9.0 db c/i 1 mhz adjacent to image channel gfsk, 0.1% ber ? ? ?20.0 db c/i cochannel ? /4-dqpsk, 0.1% ber ? ? 13 db c/i 1 mhz adjacent channel ? /4-dqpsk, 0.1% ber ? ? 0 db c/i 2 mhz adjacent channel ? /4-dqpsk, 0.1% ber ? ? ?30.0 db c/i > 3 mhz adjacent channel 8-dpsk, 0.1% ber ? ? ?40.0 db c/i image channel ? /4-dqpsk, 0.1% ber ? ? ?7.0 db c/i 1 mhz adjacent to image channel ? /4-dqpsk, 0.1% ber ? ? ?20.0 db c/i cochannel 8-dpsk, 0.1% ber ? ? 21 db c/i 1 mhz adjacent cha nnel 8-dpsk, 0.1% ber ? ? 5 db c/i 2 mhz adjacent channel 8-dpsk, 0.1% ber ? ? ?25.0 db c/i > 3 mhz adjacent channel 8-dpsk, 0.1% ber ? ? ?33.0 db c/i image channel 8-dpsk, 0.1% ber ? ? 0 db c/i 1 mhz adjacent to image ch annel 8-dpsk, 0.1% ber ? ? ?13.0 db out-of-band blocking performance (cw) e 30 mhz?2000 mhz 0.1% ber ? ?10.0 ? dbm 2000?2399 mhz 0.1% ber ? ?27 ? dbm 2498?3000 mhz 0.1% ber ? ?27 ? dbm 3000 mhz?12.75 ghz 0.1% ber ? ?10.0 ? dbm
document number: 002-14773 rev. *l page 37 of 55 cyw20702 out-of-band blocking perfo rmance, modulated interferer 776?764 mhz cdma ? ?15 ? dbm 824?849 mhz cdma ? ?15 ? dbm 1850?1910 mhz cdma ? ?20 ? dbm 824?849 mhz edge/gsm ? ?10 ? dbm 880?915 mhz edge/gsm ? ?10 ? dbm 1710?1785 mhz edge/gsm ? ?15 ? dbm 1850?1910 mhz edge/gsm ? ?15 ? dbm 1850?1910 mhz wcdma ? ?25 ? dbm 1920?1980 mhz wcdma ? ?25 ? dbm intermodulation performance f bt, df = 5 mhz ? ?39.0 ? ? dbm spurious emissions g 30 mhz to 1 ghz ? ? ? ?57 dbm 1 ghz to 12.75 ghz ? ? ? ?47 dbm 65 mhz to 108 mhz fm rx ? ?145 ? dbm/hz 746 mhz to 764 mhz cdma ? ?145 ? dbm/hz 851?894 mhz cdma ? ?145 ? dbm/hz 925?960 mhz edge/gsm ? ?145 ? dbm/hz 1805?1880 mhz edge/gsm ? ?145 ? dbm/hz 1930?1990 mhz pcs ? ?145 ? dbm/hz 2110?2170 mhz wcdma ? ?145 ? dbm/hz a. all specifications are singl e ended. unused inputs are left open. b. all specifications, except typical, are for industrial temperatures. for details see table 18 . c. typical operating conditions are 1.22v operating voltage and 25c ambient temperature. d. the receiver sensitivity is measured at ber of 0.1% on the device interface. e. meets this specification using front-end band pass filter. f. f0 = -64 dbm bluetooth-modulated signal, f1 = ?39 dbm sine wa ve, f2 = ?39 dbm bluetooth-modulated signal, f0 = 2f1 ? f2, and |f2 ? f1| = n*1 mhz, where n is 3, 4, or 5. for the typical case, n = 5. g. includes baseband radiated emissions. table 19. receiver rf specifications a, b (cont.) parameter conditions minimum typical c maximum unit
document number: 002-14773 rev. *l page 38 of 55 cyw20702 table 20. transmitter rf specifications a, b a. all specifications ar e for industrial temperat ures. for details, see table 18 . b. all specifications are singl e-ended. unused input are left open. parameter conditions minimum typical maximum unit general frequency range ? 2402 ? 2480 mhz class1: gfsk tx power c c. +10 dbm output for gfsk measured with vddtf = 2.9 v. ?6.510?dbm class1: edr tx power d d. +8 dbm output for edr measured with vddtf = 2.9 v. ? 4.58?dbm class 2: gfsk tx power ? ?1.5 2 ? dbm power control step ? 246db modulation accuracy ? /4-dqpsk frequency stability ? ?10 ? 10 khz ? /4-dqpsk rms devm ? ? ? 20 % ? /4-qpsk peak devm ? ? ? 35 % ? /4-dqpsk 99% devm ? ? ? 30 % 8-dpsk frequency stability ? ?10 ? 10 khz 8-dpsk rms devm ? ? ? 13 % 8-dpsk peak devm ? ? ? 25 % 8-dpsk 99% devm ? ? ? 20 % in-band spurious emissions +500 khz ? ? ? ?20 dbc 1.0 mhz < |m ? n| < 1.5 mhz ? ? ? ?26 dbc 1.5 mhz < |m ? n| < 2.5 mhz ? ? ? ?20 dbm |m ? n| > 2.5 mhz ? ? ? ?40 dbm out-of-band spur ious emissions 30 mhz to 1 ghz ? ? ? ?36.0 e e. maximum value is the value required for bluetooth qualification. dbm 1 ghz to 12.75 ghz ? ? ? ?30.0 e, f f. meets this spec using a front-end bandpass filter. dbm 1.8 ghz to 1.9 ghz ? ? ? ?47.0 dbm 5.15 ghz to 5.3 ghz ? ? ? ?47.0 dbm gps band noise emission (without a front-end band pass filter) 1572.92 mhz to 1577.92 mhz ? ? ?150 ?127 dbm/hz out-of-band noise emissions (without a front-end band pass filter) 65 mhz to 108 mhz fm rx ? ?145 ? dbm/hz 746 mhz to 764 mhz cdma ? ?145 ? dbm/hz 869 mhz to 960 mhz cdma ? ?145 ? dbm/hz 925 mhz to 960 mhz edge/gsm ? ?145 ? dbm/hz 1805 mhz to 1880 mhz edge/gsm ? ?145 ? dbm/hz 1930 mhz to 1990 mhz pcs ? ?145 ? dbm/hz 2110 mhz to 2170 mhz wcdma ? ?145 ? dbm/hz
document number: 002-14773 rev. *l page 39 of 55 cyw20702 9.2 timing and ac characteristics in this section, use the numbers listed in the re ference column to interp ret the timing diagrams. 9.2.1 startup timing there are two basic startup scenarios. in one scenario, the chip startup and firmware boot is held off while the rst_n pin is a sserted. in the second scenario, the chip startup and firmware boot is di rectly triggered by the chip power-up. in this case, an interna l power- on reset (por) is held fo r a few ms, after which the chip commences startup. the global reset signal in the cyw20702 is a logical or (actually a wired and, since the signals are active low) of the rst_n i nput and the internal por signals. the last signal to be released dete rmines the time at which the chip is released from reset. the por is typically asserted for 3 ms after vddc crosses the 0.8v th reshold, but it may be as soon as 1.5 ms after this event. after the chip is released from reset, both startup scenarios follow the same sequence, as follows: 1. for the cyw20702a1kwfbg part: after approximately 120 s, the clk_req (gpio_5) signal is asserted. 2. the chip remains in sleep state for a minimum of 4.2 ms. 3. if present, the crystal (or tcxo) an d lpo clocks must be oscillating by the end of t he 4.2 ms period. if a tcxo clock is not in the system, a crystal is assumed to be present at the xin and xout pins. if an lpo clock is not used, the firmware will detect the absence of a clock at the lp o_in lead and use the internal lpo clock instead. the following two figures illustrate two startup timing scenarios. figure 10. startup timing from rst_n vddio, vbat,reg_en vddc > 0.8v t max = 4.2 ms vreg rst_n gpio5 (clk_req) xtal/tcxo lpo t =64 to 171 s t = 800 s t rampmax = 200 s
document number: 002-14773 rev. *l page 40 of 55 cyw20702 figure 11. startup timing from power-on reset 9.2.2 usb full-speed timing ta b l e 2 1 through table 26 shows timing specifications for vdd_usb = 3.3v, v ss = 0v, and t a = 0 to 85 o c operating temperature range. figure 12. usb full-speed timing table 21. usb full-speed timing specifications reference characteristics minimum maximum unit 1 transition rise time 4 20 ns 2 transition fall time 4 20 ns 3 rise/fall timing matching 90 111 % 4 full-speed data rate 12 ? 0.25% 12 + 0.25% mb/s vddio, vbat,reg_en vddc > 0.8v t max = 4.2 ms gpio5 (clk_req) t min = 1.5 ms vreg xtal/tcxo lpo internal por t rampmax = 200 s t = 800 s t = 64 to 171 s d+ d- v crs 90% 90% 10% 10% 1 2
document number: 002-14773 rev. *l page 41 of 55 cyw20702 9.2.3 uart timing figure 13. uart timing 9.2.4 pcm interface timing table 22. uart timing specifications reference characteristics minimum maximum unit 1 delay time, uart_cts_n low to uart_txd valid ? 24 baudout cycles 2 setup time, uart_cts_n high before midpoint of stop bit ? 10 ns 3 delay time, midpoint of stop bit to uart_rts_n high ? 2 baudout cycles table 23. pcm interface timing specifications (short frame synchronization, master mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency 128 2048 khz 2 pcm bit clock high time 128 ? ns 3 pcm bit clock low time 209 ? ns 4 delay from pcm_bclk rising edge to pcm_sync high ? 50 ns 5 delay from pcm_bclk rising edge to pcm_sync low ? 50 ns 6 delay from pcm_bclk rising edge to data valid on pcm_out ? 50 ns 7 setup time for pcm_in before pcm_bclk falling edge 50 ? ns 8 hold time for pcm_in after pcm_bclk falling edge 10 ? ns 9 delay from falling edge of pcm_bclk during last bit period to pcm_out becoming high impedance ?50ns 1 3 2 uart_cts_n uart_txd uart_rxd uart_rts_n midpoint of stop bit midpoint of stop bit
document number: 002-14773 rev. *l page 42 of 55 cyw20702 figure 14. pcm interface timing (short frame synchronization, master mode) 1 2 3 4 5 6 7 8 pcm_bclk pcm_sync pcm_out pcm_in bit 15 (previous frame) bit 15 (previous frame) bit 0 bit 0 bit 15 bit 15 9 high impedence
document number: 002-14773 rev. *l page 43 of 55 cyw20702 figure 15. pcm interface timing (short frame synchronization, slave mode) table 24. pcm interface timing specifications (short frame synchronization, slave mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency 128 2048 khz 2 pcm bit clock high time 209 ? ns 3 pcm bit clock low time 209 ? ns 4 setup time for pcm_sync before falling edge of pcm_bclk 50 ? ns 5 hold time for pcm_sync after falling edge of pcm_bclk 10 ? ns 6 hold time of pcm_out after pcm_bclk falling edge ? 175 ns 7 setup time for pcm_in before pcm_bclk falling edge 50 ? ns 8 hold time for pcm_in after pcm_bclk falling edge 10 ? ns 9 delay from falling edge of pcm_bclk during last bit period to pcm_out becoming high impedance ? 100 ns 1 2 3 4 5 6 7 8 pcm_bclk pcm_sync pcm_out pcm_in bit 0 bit 0 bit 15 bit 15 bit 15 (previous frame) bit 15 (previous frame) high impedence 9
document number: 002-14773 rev. *l page 44 of 55 cyw20702 figure 16. pcm interface timing (long frame synchronization, master mode) table 25. pcm interface timing specifications (long frame synchronization, master mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency 128 2048 khz 2 pcm bit clock high time 209 ? ns 3 pcm bit clock low time 209 ? ns 4 delay from pcm_bclk rising edge to pcm_sync high during first bit time ?50ns 5 delay from pcm_bclk rising edge to pcm_sync low during third bit time ?50ns 6 delay from pcm_bclk rising edge to data valid on pcm_out ? 50 ns 7 setup time for pcm_in before pcm_bclk falling edge 50 ? ns 8 hold time for pcm_in after pcm_bclk falling edge 10 ? ns 9 delay from falling edge of pcm_bclk during last bit period to pcm_out becoming high impedance ?50ns 1 2 3 4 5 6 7 8 pcm_bclk pcm_sync pcm_out pcm_in bit 0 bit 0 bit 1 bit 1 bit 2 bit 2 bit 15 bit 15 high impedence 9
document number: 002-14773 rev. *l page 45 of 55 cyw20702 figure 17. pcm interface timing (long frame synchronization, slave mode) table 26. pcm interface timing specifications (long frame synchronization, slave mode) reference characteristics minimum maximum unit 1 pcm bit clock frequency. 128 2048 khz 2 pcm bit clock high time. 209 ? ns 3 pcm bit clock low time. 209 ? ns 4 setup time for pcm_sync before falling edge of pcm_bclk during first bit time. 50 ? ns 5 hold time for pcm_sync after falling edge of pcm_bclk during second bit period. (pcm_sync may go low any time from second bit period to last bit period). 10 ? ns 6 delay from rising edge of pcm_bclk or pcm_sync (whichever is later) to data valid for first bit on pcm_out. ?50ns 7 hold time of pcm_out after pcm_bclk falling edge. ? 175 ns 8 setup time for pcm_in before pcm_bclk falling edge. 50 ? ns 9 hold time for pcm_in after pcm_bclk falling edge. 10 ? ns 10 delay from falling edge of pcm_bclk or pcm_sync (whichever is later) during last bit in slot to pcm_out becoming high impedance. ?100ns 1 2 3 45 7 8 9 pcm_bclk pcm_sync pcm_out pcm_in bit 0 bit 1 bit 0 bit 1 bit 15 bit 15 6 high impedence 10
document number: 002-14773 rev. *l page 46 of 55 cyw20702 9.2.5 bsc interface timing figure 18. bsc interface timing diagram table 27. bsc interface timing specifications reference characteristics minimum maximum unit 1 clock frequency ? 100 400 800 1000 khz 2 start condition setup time 650 ? ns 3 start condition hold time 280 ? ns 4 clock low time 650 ? ns 5 clock high time 280 ? ns 6 data input hold time a a. as a transmitter, 300 ns of delay is provided to bridge the undefined region of t he falling edge of scl to avoid unintended g eneration of start or stop conditions 0?ns 7 data input setup time 100 ? ns 8 stop condition setup time 280 ? ns 9 output valid from clock ? 400 ns 10 bus free time b b. time that the cbus must be free before a new transaction can start. 650 ? ns 2 3 4 5 6 78 9 10 scl sda in sda out 1
document number: 002-14773 rev. *l page 47 of 55 cyw20702 9.2.6 spi timing the spi interface can be clocked up to 12 mhz. ta b l e 2 8 and figure 20 show the timing requirements when operating in spi mode 0 and 2. figure 19. spi timing, mode 0 and 2 table 28. spi mode 0 and 2 reference characteristics minimum maximum unit 1 time from slave assert spi_in t to master assert spi_csn (directread) 0 ns 2 time from master assert spi_csn to slave assert spi_int (directwrite) 0 ns 3 time from master assert spi _csn to first clock edge 20 ns 4 setup time for mosi data lines 8 ? sck ns 5 hold time for mosi data lines 8 ? sck ns 6 time from last sample on mosi/m iso to slave deassert spi_int 0 100 ns 7 time from slave deassert spi_int to master deassert spi_csn 0 ns 8 idle time between subsequent spi transactions 1 sck ns 5 spi_csn spi_int (directwrite) spi_clk (mode ? 0) spi_mosi \ first ? bit spi_miso not ? driven first ? bit second ? bit second ? bit last ? bit last ? bit 3 4 6 7 8 spi_clk (mode ? 2) spi_int (directread) 1 2 not ? driven \
document number: 002-14773 rev. *l page 48 of 55 cyw20702 ta b l e 2 9 and figure 20 show the timing requirements when operating in spi mode 0 and 2. figure 20. spi timing, mode 1 and 3 table 29. spi mode 1 and 3 reference characteristics minimum maximum unit 1 time from slave assert spi_int to master assert spi_csn (directread) 0 ns 2 time from master assert spi_csn to slave assert spi_int (directwrite) 0 ns 3 time from master assert spi _csn to first clock edge 20 ns 4 setup time for mosi data lines 8 ? sck ns 5 hold time for mosi data lines 8 ? sck ns 6 time from last sample on mosi/miso to slave deassert spi_int 0100ns 7 time from slave deassert spi_int to master deassert spi_csn 0 ns 8 idle time between subsequent spi transactions 1 sck ns 5 spi_csn spi_int (directwrite) spi_clk (mode ? 1) spi_mosi \ invalid ? bit spi_miso not ? driven invalid ? bit first ? bit first ? bit last ? bit last ? bit 3 4 6 7 8 \ not ? driven spi_clk (mode ? 3) spi_int (directread) 1 2
document number: 002-14773 rev. *l page 49 of 55 cyw20702 9.3 electrostatic discharge table 30. electrostatic discharge classifi cation ? human body model (esd ? hbm) a a. jesd22-a114 is used as reference. title description class 0 < 250v class 1a 250v to < 500v class 1b 500v to < 1000v class 1c 1000v to < 2000v class 2 2000v to < 4000v class 3a 4000v to < 8000v class 3b 8000v procedures (hbm) for every pin, a pos itive and negative pulse is applied between (1) the pin and ground, (2) the pin and vcc, and (3) the pin and all other pins tied together. test electrostatic discharge (esd) conditions human body model (hbm) jesd22-a114 purpose to establish the esd sensitivity. failure a failure is any device that fails to meet data sheet electric al requirements after esd testing. pass/fail goal is >1000v on all i/o pins (hbm) table 31. electrostatic discharge ? machine model (esd ? mm) a a. jesd22-a115, latest revision, is used as reference. title description class a 200v class b > 200v to 400v class c > 400v procedures (mm) each sample is stressed at one volt age level using 1 positive and 1 negative pulse with a minimum of 0.5 second between pulses per pin for all pin combinations. test electrostatic discharge ? charged-device model (esd - mm) conditions machine model (mm) jesd22-a115 purpose to establish the esd sensitivity. failure a failure is any device that fails to meet data sheet electrical requirements after esd testing.
document number: 002-14773 rev. *l page 50 of 55 cyw20702 10. mechanical information figure 21. 50-ball wfbga mechanical drawing
document number: 002-14773 rev. *l page 51 of 55 cyw20702 10.1 tape, reel, and packing specification figure 22. reel, labeling , and packing specification ? ? ? ? c y p r e s s b a r c o d e esd warning device orientation/mix lot number each reel may contain up to three lot numbers , independent of the date code . individual lots must be labeled on the box , moisture barrier bag, and the reel. moisture barrier bag contents/label desiccant pouch (minimum 1) humidity indicator (minimum 1) reel (maximum 1) pin 1 top-right corner toward sprocket holes.
document number: 002-14773 rev. *l page 52 of 55 cyw20702 11. ordering information the following table lists available part numbers and describes diff erences in package type, available i/o, and functional confi guration. see the referenced figures and tables for me chanical drawings and package i/o information. all packages are rated from ?30c to +85c. 12. acronyms and abbreviations in most cases, acronyms and abbreviations are defined on first use. for a comprehensive list of acronyms and other terms used in cypress documents, go to: http://www.cypre ss.com/glossary 13. iot resources cypress provides a wealth of data at http://www.cypress.com /internet-things-iot to help you to select th e right iot device for your design, and quickly and effectively integrate the device into your design. cypress provides customer access to a wide range of information, including technical documentat ion, schematic diagrams, product bill of ma terials, pcb layout information, and soft ware updates. customers can acquire technica l documentation and soft ware from the cypress support community website ( http://community.cypress.com/ ). part number package type cyw20702a1kwfbg commercial 50-ball wfbga, 4.5 mm x 4.0 mm x 0.8 mm cyw20702b0kwfbg commercial 50-ball wfbga, 4.5 mm x 4.0 mm x 0.8 mm note: see figure 21 .
document number: 002-14773 rev. *l page 53 of 55 cyw20702 document history document title: cyw20702 single-chip bluetooth transceiver and baseband processor document number: 002-14773 revision ecn orig. of change submission date description of change ** ? ? 04/20/2010 20702-ds100-ri initial release *a ? ? 06/11/2010 20702-ds101-ri updated: power amplifier programming package options and tcxo mode frequency selection table 6. cyw20702 signal description section 8. ball grid arrays figure 9. startup timing from rst_n figure 10. startup timing from power-on reset section 10. mechanical information section 11. ordering information removed: mobile handsets and smart phones from the chips relevant applications. the 42-bump wlbga package from the features list. mobile phone usage model clock request output and txco or option *b ? ? 08/16/2010 20702-ds102-ri updated: table 6. cyw20702 signal descriptions table 8. absolute maximum voltages table 9. power supply table 11. main regulator (main ldo) electrical specifications *c ? ? 09/13/2010 20702-ds103-r updated: the document number to show that the document is for external use. *d ? ? 02/23/2011 20702-ds104-r updated: section 11. ordering information *e ? ? 08/01/2011 20702-ds105-r updated: simultaneous uart transport and bridging *f ? ? 08/15/2011 20702-ds106-r added: spi timing electrostatic discharge *g ? ? 12/02/2011 20702-ds107-r updated: table 27. spi mode 0 and 2 *h ? ? 12/09/2011 20702-ds108-r updated: table 27. spi mode 0 and 2
document number: 002-14773 rev. *l page 54 of 55 cyw20702 *i ? utsv 05/11/2012 20702-ds109-r updated: added compliance support for low energy (le). figure 1. system block diagram figure 2. functional block diagram table 2. power control pin summary microprocessor unit ? overview ? microprocessor rom and ram value in ? overview ? one-time programmable memory tcxo clock request support lpo clock interface table 7. bcm20702 signal descriptions table 8. ball-out for the 50-ball wfbga table 14. pad i/o characteristics table 19. receiver rf specifications, startup timing section 11. ordering information *j ? ? 02/25/2013 updated: host controller power management hci 3-wire transport (uart h5) *k ? ? 03/04/2014 updated: spi table 7. bcm20702 signal descriptions table 13. digital i/o characteristics *l 5520447 utsv 11/23/2016 updated to cypress template. added cypress part numbering scheme. document title: cyw20702 single-chip bluetooth transceiver and baseband processor document number: 002-14773
document number: 002-14773 rev. *l revised november 23, 2016 page 55 of 55 cyw20702 ? cypress semiconductor corporation, 2010-2016. this document is the property of cypress semiconductor corporation and its subs idiaries, including spansion llc (?cypress?). this document, including any software or firmware included or referenced in this document (?software?), is owned by cypress under the intellec tual property laws and treaties of the united states and other countries worldwide. cypress reserves all rights under such laws and treaties and does not, except as specifically stated in this paragra ph, grant any license under its patents, copyrights, trademarks, or other intellectual property rights. if the software is not accompanied by a license agreement and you do not otherwise have a written agreement with cypress governing the use of the software, then cypress hereby grants you a personal, non-exclusive, nontransferable license (without the right to sublicense) (1) under its copyright rights in the software (a) for software provided in source code form, to modify and reproduce the software solely for use with cypress hard ware products, only internally within your organization, and (b) to distribute the software in binary code form externally to end users (either directly or indirectly through resellers and distributors), solely for use on cypress hardware product units, and (2) u nder those claims of cypress's patents that are infringed by the software (as provided by cypress, unmodified) to make, use, distribute, and import the software solely for use with cypress hardware product s. any other use, reproduction, modi fication, translation, or compilation of the software is prohibited. to the extent permitted by applicable law, cypress makes no warranty of any kind, express or implied, with regard to this docum ent or any software or accompanying hardware, including, but not limited to, the im plied warranties of merchantability and fitness for a particular purpose. to the extent permitted by applicable law, cypress reserves the right to make changes to this document without further notice. cypress does n ot assume any liability arising out of the application or use of any product or circuit described in this document. any information pr ovided in this document, includ ing any sample design informati on or programming code, is provided only for reference purposes. it is the responsibility of the user of this document to properly design, program, and test the functionality and safety of any appli cation made of this information and any resulting product. cypress products are not designed, intended, or authorized fo r use as critical components in systems de signed or intended for the operation of w eapons, weapons systems, nuclear in stallations, life-support devices or systems, other medical devices or systems (inc luding resuscitation equipment and surgical implants), pollution control or hazar dous substances management, or other uses where the failure of the device or system could cause personal injury , death, or property damage (?unintended uses?). a critical component is any compon ent of a device or system whose failure to perform can be reasonably expected to cause the failure of the device or system, or to affe ct its safety or effectiveness. cypress is not liable, in whol e or in part, and you shall and hereby do release cypress from any claim, damage, or other liability arising from or related to all unintended uses of cypress products. you shall indemnify and hold cyp ress harmless from and against all claims, costs, damages, and other liabilities, including claims for personal inju ry or death, arising from or related to any unintended uses of cypress products. cypress, the cypress logo, spansion, the spansion logo, and combinations thereof, wiced, psoc, capsense, ez-usb, f-ram, and tra veo are trademarks or registered trademarks of cypress in the united states and other countries. for a more complete list of cypress trademarks, visit cypress.com. other names and brand s may be claimed as property of their respective owners. sales, solutions, and legal information worldwide sales and design support cypress maintains a worldwide network of offices, solution cent ers, manufacturer?s representativ es, and distributors. to find t he office closest to you, visit us at cypress locations . products arm ? cortex ? microcontrollers cypress.com/arm automotive cypress.com/automotive clocks & buffers cypress.com/clocks interface cypress.com/interface internet of things cypress.com/iot lighting & power control cypress.com/powerpsoc memory cypress.com/memory psoc cypress.com/psoc touch sensing cypress.com/touch usb controllers cypress.com/usb wireless/rf cypress.com/wireless psoc ? solutions psoc 1 | psoc 3 | psoc 4 | psoc 5lp cypress developer community forums | wiced iot forums | projects | video | blogs | training | components technical support cypress.com/support 55

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