6522as?smic?05 sep 05 features general high-performance, low-power secureavrtm enhanced risc architecture ? 135 powerful instructions (most executed in a single clock cycle) low power idle and power-down modes bond pad locations conforming to iso 7816-2 esd protection to 6000v operating range: 1.62v to 5.5v compliant with gsm, 3gpp and emv 2000 sp ecifications; pc industry compatible available in wafers, modules and industry-standard packages memory 256k bytes of rom user program memory 32k bytes of rom dedicated to atmel?s cr ypto-library 72k bytes of eeprom, including 128 otp by tes and 384-byte bit-addressable area ? 1 to 128-byte program/erase ? 1.25 ms program / 1.25 ms erase ? typically more than 5 00,000 write/erase cycles at a temperature of 25c ? 10 years data retention eeprom erase only mode write eeprom with or without autoerase 8k bytes of ram peripherals iso 7816 controller ? up to 625 kbps at 5 mhz ? compliant with t = 0 and t = 1 protocols one i/o port optional usb 2.0 full speed interface with 5 endp oints and dma controller programmable internal oscillator (up to 40 mhz for cpu and crypto accelerator) two 16-bit timers random number generator (rng) 2-level, 9-vector interrupt controller hardware des and triple des dpa/dema resistant checksum accelerator crc 16 & 32 engine (compliant with iso/iec 3309) 32-bit advx? cryptographic accelerator for public key operations with gf(2n) multiplier and firmware (rsa, ecc, key generation) security dedicated hardware for protection against spa/dpa/sema/dema attacks advanced protection against physical attack, including active shield environmental protection systems voltage monitor frequency monitor light protection temperature monitor secure memory management/access protection (supervisor mode) development tools voyager emulation platform (atv4 adva nced) to support software development iar systems ewavr? v3.10 debugger or atmel?s avr studio? version 4.07 or above software libraries and application notes secure microcontroller for smart cards at90sc 25672rct (-usb) preliminary summary note: this is a summary document. a complete document will be available under nda. for more information, please contact your local atmel sales office.
2 AT90SC25672RCT (-usb) 6522as?smic?05 sep 05 description the AT90SC25672RCT(-usb) is a low-power, high-performance, 8/16-bit microcontroller with rom program memory, eeprom data memory, cryptographic acce lerator based on the secu reavr enhanced risc arch itecture. by executing powerful instructions in a single clock cycle, the at90sc25 672rct(-usb) achieves throu ghputs close to 1 mips per mhz. its harvard architecture includes 32 generalpurpose working registers directly connected to the alu, allowing two indepen- dent registers to be accessed in one single instruction executed in one clock cycle. the AT90SC25672RCT(-usb) uses a new avr ? architecture, the secureavr that allows the linear addressing of up to 8m bytes of code and up to 16m bytes of data as well as a number of new functional and security features. the cryptographic accelerator featured in this product is the advx, a 32-bit accelerator dedicated to performing fast encryp- tion and authentication functions. it is combined with a 32k byte-rom for a high-performance and secure crypto firmware. the ability to map the eeprom in the code space allows parts of the program memory to be reprogrammed in-system. this technology combined with th e versatile 8/16-bit cpu on a monolithic chip provides a highly flexible and cost-effective solution to many smart card applications. additional security features include power and frequency protection logic, logical scrambling on program data and addresses, power analysis countermeasur es and memory accesses controlled by a supervisor mode. a block diagram of the AT90SC25672RCT(-usb) is shown in figure 1 hereafter. optional usb contro ller description the AT90SC25672RCT(-usb) optionally features an usb v2.0 full speed controller which requires a 48 mhz external crystal for the data transfer. the usb interface consists of a serial interface engine (sie) and a universal function inter- face (ufi). the sie performs clock/data separation, nr zi encoding and decoding, bit stuffing, crc generation and checking and serial-parallel data conversion. the ufi connects the usb interface to the avr. it consists of a protocol engine and provides five configurable data transfer endpoints, each with it?s own dpram in the memory area. t he data transfer type for each endpoint is configured by soft- ware. the table below indicates the characteristics of each endpoint: a dma controller allows a fast communication ra te between the ram of the cpu and the dpram. the usb controller provides a dynamic pull-up attachment and detachment and a host detection mechanism. in addition, it offers an automatic interface detection between the usb 2.0 and the iso7816 port. table 1: characteristics of each endpoint. endpoint number size (bytes) available data transfer modes ep0 64 bulk, isochronous, interrupt, control ep1 2 * 64 bulk, isochronous, interrupt ep2 2 * 64 bulk, isochronous, interrupt ep3 64 bulk, isochronous, interrupt, control ep4 64 bulk, isochronous, interrupt, control
3 AT90SC25672RCT (-usb) 6522as?smic?05 sep 05 figure 1. AT90SC25672RCT(-usb) secureavr enhanced risc architecture . eeprom user memory program memory pc 16 instruction register instruction decoder 16 control lines 16 access control general purpose registers x alu 8 y z data bus 8-bit 8 8 status register access control rng crc and checksum accelerator des/triple des timers rst reset circuit iso 7816 i/o port 0 iso 7816 controller in/out0 interrupt unit ram data memory otp crypto rom rom on-chip security (optional usb controller) (usb d+) (usb d-) advx crypto accel. secure control vcc / vbus clk gnd (usb-xin) (usb-xout)
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