TX25 computer on module ? processor i.mx257, 400 mhz ? ram 64 mb sdram ? rom 128mb nand flash ? power supply single 3.0v to 5.5v ? size 26mm so-dimm ? temp.-range -40c..8 5c key features ? 10/100mbps ethernet ? high-speed usb 2.0 otg ? full-speed usb 2.0 host ? lcd controller ? still-picture camera interface ? several peripheral interfaces: uart, sd-card, i2c, pwm, 1-wire, keypad, digital audio (ac97/i2s), configurable serial peripheral interface, 4/5 wire touchscreen, can os support ? windows embedded ce ? linux 2.6 ? redboot bootloader development system ? starter-kit v ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de 4 0 0 m h z 4 0 0 m h z a r m 9 a r m 9
TX25 board highlights: ? lowest cost 400mhz arm9 ? industrial temperature range ? standard tx-dimm pinout ? as small as possible - only 26mm the TX25 is a member of a module series, specially designed for freescales i.mx25 multimedia processors. tx modules are complete computers, implemented on a board smaller than a credit card, and ready to be designed into your embedded system. tx modules includes a freescale? i.mx processor, sdram and flash memory. the integrated lcd-controller enables direct connection of an lcd screen. the TX25 is specifically targeted at embedded applications where size, high cpu-performance and cost are critical factors. computer on module ? freescale? i.mx257, 400 mhz ? 64 mbyte sdram (16bit) ? 128 mbyte nand flash memory ? dimm200-module (67,6mm x 26 mm x 3,6mm) ? operating temperature range -40..85c processor the i.mx257 processor introduces several key new features such as 3.3v i/o support, three general-purpose 12-bit adcs, a touch screen controller and integrated 128k sram to improve system performance or low-power lcd refresh. standard tx-dimm pinout: ? 4-wire uarts (x3) ? lcd ? csi (cmos sensor interface) ? i2c / 1-wire / pwm ? ssi/ac97/i2s (x2) ? 4-wire sd-card/sdio ? keypad 4x4 ? cspi ( configurable serial peripheral interface) high-speed communication interfaces incl. onboard ethernet phy / on-chip usb phy allows direct use of connectors/magnetics on the baseboard without the need for additional logic: ? 10/100 mbps ethernet ? 480 mbps usb otg ? 12 mbps usb host additional interfaces like can, 4/5-wire resistive touch-screen, 2 uarts and external memory interface are available on TX25 specific pins. some interfaces are multiplexed with other functions. power supply the TX25 accepts an input voltage from various sources: ? 1-cell li-ion/polymer (3.0v to 4.2v) ? 5.0v usb supply or ac wall adapter ? 3.3v read more in our tx-guide: www.karo-electronics.com/tx-guide ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de cpu sdram flash TX25/400/64s/128f/i 400mhz i.mx257 64mb 128mb -40c..85c ordering information order number temp. 2 0 1 3 - 0 2 - 1 4
TX25 starter-kit v the starter-kit v is a ready-to-use development system for building applications based on the tx embedded processor boards. ? dimm200 tx socket ? two sd-card sockets ? usb 2.0 otg and usb 2.0 host connector ? d-sub 15 vga connector ? 40pin lcd flat cable header ? 3.5mm headphone connector ? jtag interface ? sgtl5000 audio codec ? tsc2007 touchscreen controller ? rs232 on 10pin flat cable and sub-d header ? all pins of the tx socket are connected to daughter board slot for easy application design-in ? 10/100 mbit/s ethernet ? 5vdc power supply by usb-otg or power jack. ? 100mm x 160mm ? schematics of the base board are included for reference. display option s the optional display comes with an ffc cable and a small adapter pcb which can be plugged directly onto the starter-kit 40pin lcd header. option 1: 5,7 vga resistive touch ? 5,7 inch tft display ? 640 x 480 dots ? white led backlight ? resistive touchsceen option 2: 5, 7 vga polytouch? ? 5,7 inch tft display ? 640 x 480 dots ? white led backlight ? capacitive touchsceen ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
TX25 pinout marked yellow: not connected pin type function i.mx25 pad name alternate functions gpio description (refer to i.mx25 manuals for details) power supply & reset 1-4 power vin module power supply input (3.0v-5.5v) 5-7, 9-12 power vout 3.3v power supply output (up to 0.2a) 8 3v3 bootmode 10k-pu boot mode select h: boot from nand / l: boot from uart/usb 13 power bat_vdd dryice backup power supply input (max. 1.55v) 14 nc not connected 15 3v3 vstby_ack hreset_b ss3 epito gpio3[18] pulse indication on finish of internal system reset, by visibility of hreset_b signal. after reset, this pin can be used for other purposes. 16 3v3 #por power on reset - active low input signal. typically a push button reset. pull low to force a reset. leave unconnected or connect to 3v3 if unused. 63.5k? pull-up resistor. 17 3v3 reset_in_b reset_in_b master reset - external active low schmitt trigger input signal. when this signal goes active, all modules (except the reset module, sdramc module, and the clock control module) are reset. 18 gnd gnd ethernet 19 analog etn_txn transmit data negative: 100base-tx or 10base-t differential transmit output to magnetics. 20 3v3 #etn_linkled active low link on indication: active indicates that the link is on. 21 analog etn_txp transmit data positive: 100base-tx or 10base-t differential transmit output to magnetics. 22 power etn_3v3 +3.3v analog power supply output to magnetics 23 analog etn_rxn receive data negative: 100base-tx or 10base-t differential receive input from magnetics. 24 3v3 #etn_actled active low activity indication: active indicates that there is carrier sense (crs) from the active pmd. 25 analog etn_rxp receive data positive: 100base-tx or 10base-t differential receive input from magnetics. 26 gnd gnd usb-host 27 3v3 usbh_vbusen d9 lcdc_ld[22] usbh2_pwr gpio4[11] active high external 5v supply enable. this pin is used to enable the external vbus power supply. 28 3v3 #usbh_oc d8 lcdc_ld[23] usbh2_oc gpio4[12] 10k-pu active low over-current indicator input connected to a gpio. this signal can be used as an input only. 10k? pull-up resistor. 29 analog usbh_dm usbphy2_dm d- pin of the usb cable 30 nc not connected 31 analog usbh_dp usbphy2_dp d+ pin of the usb cable 32 gnd gnd usb-otg 33 3v3 usbotg_id usbphy1_uid id pin of the usb cable. for an a-device id is grounded. for a b- device id is floated. 34 3v3 usbotg_vbusen gpio_a usbotg_pwr row[4] / scl txcan / pwm0 int_mux_out gpio1[0] active high external 5v supply enable. this pin is used to enable the external vbus power supply. 35 analog usbotg_dm usbphy1_dp d- pin of the usb cable 36 3v3 #usbotg_oc gpio_b usbotg_oc row[5] / sda rxcan / pwmo gpio1[1] 10k-pu active low over-current indicator input connected to a gpio. 10k? pull-up resistor. 37 analog usbotg_dp usbphy1_dp d+ pin of the usb cable 38 analog usbotg_vbus usbphy1_vbus vbus pin of the usb cable. this pin is used for the vbus comparator inputs. 39 gnd gnd - i2c 40 3v3 i2c_data i2c1_dat slcdc_data[7] gpio1[13] i2c data ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
TX25 pin type function i.mx25 pad name alternate functions gpio description (refer to i.mx25 manuals for details) 41 3v3 i2c_clk i2c1_clk slcdc_data[6] gpio1[12] i2c clock pwm 42 3v3 pwm pwm pwmo cmpout1 usbh2_oc bt_lpb_freq[2] gpio1[26] 47k-pu pwm output 1-wire 43 3v3 owdat rtck line dat7 sdma_dbg_pc_13 gpio3[14] 1-wire bus. requires an external pull-up resistor. the recommended resistor is specified by the generic 1-wire device used in a given system. cspi C configurable serial peripheral interface 44 3v3 cspi_ss0 cspi1_ss0 lcdc_ld[16] pwmo sdma_dbg_evt_2 slcdc_cs trace[6] gpio1[16] slave select (selectable polarity) signal 45 3v3 cspi_ss1 cspi1_ss1 sda / uart3_rts sdma_dbg_evt_3 slcdc_rs trace[7] gpio1[17] slave select (selectable polarity) signal 46 3v3 cspi_mosi cspi1_mosi uart3_rxd_mux sdma_dbg_evt_0 slcdc_data[12] trace[4] gpio1[14] master out/slave in signal 47 3v3 cspi_miso cspi1_miso uart3_txd_mux sdma_dbg_evt_1 slcdc_data[13] trace[5] gpio1[15] master in/slave out signal 48 3v3 cspi_sclk cspi1_sclk uart3_cts sdma_dbg_evt_4 slcdc_data[14] trace[8] gpio1[18] serial clock signal 49 3v3 cspi_rdy cspi1_rdy sdma_dbg_evt_5 slcdc_data[15] trace[9] gpio2[22] serial data ready signal 50 gnd gnd sd C secure digital interface 1 51 3v3 sd1_cd bclk eim_bclk gpio4[4] sd card detect C connected to a gpio 52 3v3 sd1_d[0] sd1_data0 sclk / tdata[2] aud7_txfs sdma_dbg_stat_1 slcdc_data[2] trace[12] gpio2[25] sd data bidirectional signalsif the system designer does not want to make use of the internal pull-up, via the pull-up enable register, a 50 kC69 k external pull up resistor must be added. 53 3v3 sd1_d[1] sd1_data1 rdy / tdata[3] aud7_rxd sdma_dbg_stat_2 slcdc_data[3] trace[13] gpio2[26] 54 3v3 sd1_d[2] sd1_data2 ss0 / rx_clk aud7_rxc sdma_dbg_stat_3 slcdc_data[4] trace[14] gpio2[27] 55 3v3 sd1_d[3] sd1_data3 ss1 / crs aud7_rxfs slcdc_data[5] trace[15] gpio2[28] 56 3v3 sd1_cmd sd1_cmd mosi / rdata[2] sdma_dbg_evt_sel slcdc_data[0] trace[10] gpio2[23] sd command bidirectional signal 57 3v3 sd1_clk sd1_clk miso / rdata[3] sdma_dbg_stat_0 slcdc_data[1] trace[11] gpio2[24] sd output clock. 58 gnd gnd 1 st uart 59 3v3 uart1_txd uart1_txd uart2_dsr lcdc_spl slcdc_data[9] gpio4[23] transmit data output signal ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
TX25 pin type function i.mx25 pad name alternate functions gpio description (refer to i.mx25 manuals for details) 60 3v3 uart1_rxd uart1_rxd uart2_dtr lcdc_cls slcdc_data[8] gpio4[22] receive data input signal 61 3v3 uart1_rts uart1_rts csi_d[0] / capin1 dcd_2 / lcdc_ps slcdc_data[10] gpio4[24] request to send input signal 62 3v3 uart1_cts uart1_cts csi_d[1] / cmpout1 ri_2 / lcdc_rev slcdc_data[11] gpio4[25] clear to send output signal 2 nd uart 63 3v3 uart2_txd uart2_txd uart2_txd_mux dat6 / tx_err extdma_0 gpio4[27] transmit data output signal 64 3v3 uart2_rxd uart2_rxd uart2_rxd_mux dat7 gpio4[26] receive data input signal 65 3v3 uart2_rts uart2_rts dat5 / col / capin1 epito / ss3 / extdma_1 gpio4[28] request to send input signal 66 3v3 uart2_cts uart2_cts dat4 / rx_err cmpout1 / ss3 extdma_2 gpio4[29] clear to send output signal 3 rd uart 67 3v3 uart5_txd ecb eim_ecb uart5_txd_mux sclk gpio3[23] transmit data output signal 68 3v3 uart5_rxd lba eim_lba uart5_rxd_mux rdy gpio3[24] receive data input signal 69 3v3 uart5_rts cs5 eim_cs5 nandf_ce2 dtack_b / rts_5 aud4_rxfs miso / trclk gpio3[21] request to send input signal 70 3v3 uart5_cts cs4 eim_cs4 nandf_ce1 cts_5 / aud4_rxc mosi / trsync gpio3[20] clear to send output signal 71 gnd gnd keypad 72 3v3 kp_col[0] kpp_col0 uart4_rxd_mux aud5_txd sdma_dbg_pc_4 gpio3[1] keypad column selection signals. 73 3v3 kp_col[1] kpp_col1 uart4_txd_mux aud5_rxd sdma_dbg_pc_5 gpio3[2] 74 3v3 kp_col[2] kpp_col2 rts_4 / aud5_txc sdma_dbg_pc_6 m3if_chosen_ master_1 gpio3[3] 75 3v3 kp_col[3] kpp_col3 cts_4 / aud5_txfs sdma_dbg_pc_7 m3if_chosen_ master_2 gpio3[4] 76 3v3 txcan gpio_c pwmo / scl capin1 / ss2 txcan gpio1[2] module specific function 77 3v3 kp_row[0] kpp_row0 uart3_rxd / dtr_1 sdma_dbg_pc_0 gpio2[29] keypad row selection signals. 78 3v3 kp_row[1] kpp_row1 uart3_txd / dsr_1 sdma_dbg_pc_1 gpio2[30] 79 3v3 kp_row[2] kpp_row2 rts_3 / aud5_rxc csi_d[0] / dcd_1 sdma_dbg_pc_2 gpio2[31] 80 3v3 kp_row[3] kpp_row3 cts_3 / aud5_rxfs csi_d[1] / ri_1 sdma_dbg_pc_3 gpio3[0] 81 3v3 rxcan gpio_d wdog_b / sda col[5] / cmpout1 rxcan / ss2 gpio1[3] module specific function 82 gnd gnd ssi 1 - serial audio port 1 (configurable to i2s protocol and ac97) 83 3v3 ssi1_int ext_armclk gpio3 [15] gpio 84 3v3 ssi1_rxd eb1 eim_eb1_b aud4_rxd / ss1 gpio2[13] receive serial data ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
TX25 pin type function i.mx25 pad name alternate functions gpio description (refer to i.mx25 manuals for details) 85 3v3 ssi1_txd eb0 eim_eb0_b aud4_txd / ss0 gpio2[12] transmit serial data 86 3v3 ssi1_clk oe eim_oe aud4_txc gpio2[14] serial clock 87 3v3 ssi1_fs rw eim_rw aud4_txfs gpio3[25] frame sync 88 gnd gnd ssi 2 - serial audio port 2 (configurable to i2s protocol and ac97) 89 3v3 ssi2_int upll_bypclk gpio3 [16] gpio 90 3v3 ssi2_rxd power_fail power_fail_int aud7_rxd / cts_4 gpio3[19] receive serial data 91 3v3 ssi2_txd gpio_e scl / lcdc_ld[16] aud7_txd uart4_rxd_mux cti_trig_in0_6 gpio1[4] transmit serial data 92 3v3 ssi2_clk gpio_f lcdc_ld[17] epito / aud7_txc uart4_txd_mux cti_trig_out0_6 gpio1[5] serial clock 93 3v3 ssi2_fs vstby_req aud7_txfs uart4_rts gpio3[17] frame sync 94 gnd gnd secure digital interface 2 95 nc not connected 96 nc not connected 97 nc not connected 98 nc not connected 99 nc not connected 100 nc not connected 101 nc not connected 102 gnd gnd cmos sensor interface 103 3v3 csi_d0 csi_d2 uart5_rxd / dat4 sckr / clk0 / mosi usbotg_data[0] gpio1[27] sensor port data 104 3v3 csi_d1 csi_d3 uart5_txd / dat5 fsr / rst0 / miso usbotg_data[1] gpio1[28] sensor port data 105 3v3 csi_d2 csi_d4 rts_5 / dat6 / hckr ven0 / sclk usbotg_data[2] gpio1[29] sensor port data 106 3v3 csi_d3 csi_d5 cts_5 / dat7 / sckt tx0 / rdy usbotg_data[3] gpio1[30] sensor port data 107 3v3 csi_d4 csi_d6 row[6] / cmd / fst pd0 / ss0 usbotg_data[4] gpio1[31] sensor port data 108 3v3 csi_d5 csi_d7 row[7] / clk / hckt rx0 / ss1 usbotg_data[5] gpio1[6] sensor port data 109 3v3 csi_d6 csi_d8 col[6] / aud6_rxc tx5_rx0 / clk0/ ss2 usbotg_data[6] gpio1[7] sensor port data 110 3v3 csi_d7 csi_d9 col[7] / aud6_rxfs tx4_rx1 / rst0/ ss3 usbotg_data[7] gpio4[21] sensor port data 111 gnd gnd 112 3v3 csi_hsync csi_hsync aud6_txc / dat2 tx1 / pd0 bt_res[2] usbotg_nxt gpio1[10] sensor port horizontal sync 113 3v3 csi_vsync csi_vsync aud6_rxd / dat1 tx2_rx3 / tx0 usbotg_stp bt_res[1] gpio1[9] sensor port vertical sync ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
TX25 pin type function i.mx25 pad name alternate functions gpio description (refer to i.mx25 manuals for details) 114 3v3 csi_pixclk csi_pixclk aud6_txfs dat3 / tx0 / rx0 usbotg_clk bt_res[3] gpio1[11] sensor port data latch clock 115 3v3 csi_mclk csi_mclk aud6_txd / dat0 tx3_rx2 / ven0 usbotg_dir bt_res[0] gpio1[8] sensor port master clock 116 gnd gnd lcd controller and smart lcd controller 117 3v3 gpio clko gpio2[21] clock out pin from crm, clock source is controlable and can also be used for debug. 118 3v3 contrast contrast capin1 / ss1 / da_2 pwmo / crs usbh2_pwr wdog_b 119 3v3 ld0 ld0 slcdc_data[0] csi_d[0] / data[0] clk1 / usbh2_clk bt_mem_ctrl[0] gpio2[15] 47k-pu lcd data bus 120 3v3 ld1 ld1 slcdc_data[1] csi_d[1] / data[1] rst1 / usbh2_dir bt_mem_ctrl[1] gpio2[16] 10k-pd lcd data bus 121 3v3 ld2 ld2 slcdc_data[2] csi_d[15] / data[2] ven1 / usbh2_stp bt_mem_type[0] gpio2[17] 10k-pd lcd data bus 122 3v3 ld3 ld3 slcdc_data[3] csi_d[14] / data[3] tx1 / usbh2_nxt bt_mem_type[1] gpio2[18] 10k-pd lcd data bus 123 3v3 ld4 ld4 slcdc_data[4] csi_d[13] / data[4] pd1/ usbh2_data[0] bt_page_size[0] gpio2[19] 47k-pu lcd data bus 124 3v3 ld5 ld5 slcdc_data[5] csi_d[12] / data[5] rx1/ usbh2_data[1] bt_page_size[1] gpio1[19] 10k-pd lcd data bus 125 3v3 gpio a13 eim_da_h[13] lcdc_cls gpio4[1] 126 3v3 gpio a15 eim_da_h2[15] rst1 / lcdc_ps gpio2[1] 127 3v3 ld6 ld6 slcdc_data[6] csi_d[11] / data[6] clk1 usbh2_data[2] bt_bus_width[0] gpio1[20] 10k-pd lcd data bus 128 3v3 ld7 ld7 slcdc_data[7] csi_d[10] / data[7] rst1 usbh2_data[3] bt_bus_width[1] gpio1[21] 10k-pd lcd data bus 129 gnd gnd 130 3v3 ld8 ld8 slcdc_data[8] uart4_rxd/data[8] aud3_txd / tx_err cmd bt_usb_src[0] 10k-pd lcd data bus 131 3v3 ld9 ld9 slcdc_data[9] uart4_txd/data[9] aud3_rxd / col clk bt_usb_src[1] 10k-pd lcd data bus 132 3v3 ld10 ld10 slcdc_data[10] rts_4 / data[10] aud3_txc / rx_err dat0 / bt_mlc_sel 10k-pd lcd data bus 133 3v3 ld11 ld11 slcdc_data[11] cts_4 / data[11] aud3_txfs rdata[2] / dat1 10k-pd lcd data bus 134 3v3 gpio a16 eim_a[16] ven1 / lcdc_rev gpio2[2] signal for common electrode driving signal preparation (sharp panel dedicated signal). 135 3v3 gpio a14 eim_da_h2[14] clk1 / lcdc_spl gpio2[0] sampling start signal for left and right scanning. 136 3v3 ld12 ld12 slcdc_data[12] mosi / data[12] row[6] / rdata[3] dat2 / bt_src[0] lcd data bus ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
TX25 pin type function i.mx25 pad name alternate functions gpio description (refer to i.mx25 manuals for details) 137 3v3 ld13 ld13 slcdc_data[13] miso / data[13] row[7] / tdata[2] dat3 / bt_src[1] lcd data bus 138 3v3 ld14 ld14 slcdc_data[14] sclk / data[14] col[6] / tdata[3] aud3_rxc bt_eeprom_cfg 47k-pu lcd data bus 139 3v3 ld15 ld15 slcdc_data[15] rdy / data[15] col[7] / rx_clk aud3_rxfs bt_uart_src[0] 10k-pd lcd data bus 140 3v3 ld16 / gpio d15 eim_d[15] / dat7 lcdc_ld[16] gpio4[5] lcd data bus 141 3v3 ld17 / gpio d14 eim_d[14] / dat6 lcdc_ld[17] gpio4[6] lcd data bus 142 gnd gnd 143 3v3 hsync hsync scl / buffer_en ven1 usbh2_data[4] bt_uart_src[1] gpio1[22] 10k-pd line pulse or hsync 144 3v3 vsync vsync sda / dmarq / tx1 usbh2_data[5] bt_uart_src[2] gpio1[23] 10k-pd frame sync or vsyncthis signal also serves as the clock signal output for gate; driver (dedicated signal sps for sharp panel hr- tft) 145 3v3 oe_acd oe_acd slcdc_rs ss0 / da_1 / rx1 usbh2_data[7] bt_lpb_freq[1] gpio1[25] 47k-pu alternate crystal direction/output enable 146 3v3 lsclk lsclk slcdc_cs da_0 / pd1 usbh2_data[6] bt_lpb_freq[0] gpio1[24] 47k-pu shift clock 147 gnd gnd module specific signals 148 3v3 gpio a10 gpio4[0] 149 3v3 gpio a17 tx1 tx_err gpio2[3] 150 3v3 gpio a18 pd1 col gpio2[4] 151 3v3 gpio a19 rx1 rx_err gpio2[5] 152 3v3 gpio a20 clk1 rdata[2] gpio2[6] 153 3v3 gpio a21 rst1 rdata[3] gpio2[7] 154 3v3 gpio a22 ven1 tdata[2] gpio2[8] 155 3v3 gpio a23 tx1 tdata[3] gpio2[9] 156 3v3 gpio a24 pd1 rx_clk gpio2[10] 157 3v3 gpio a25 rx1 crs gpio2[11] 158 3v3 gpio cs0 gpio4[2] 159 3v3 gpio cs1 nandf_ce3 gpio4[3] 160 gnd gnd 161 3v3 d[0] d[0] 162 3v3 d[1] d[1] 163 3v3 d[2] d[2] 164 3v3 d[3] d[3] 165 3v3 d[4] d[4] 166 3v3 d[5] d[5] 167 3v3 d[6] d[6] ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
TX25 pin type function i.mx25 pad name alternate functions gpio description (refer to i.mx25 manuals for details) 168 3v3 d[7] d[7] 169 3v3 a [0] a [0] 170 3v3 a [1] a [1] 171 gnd gnd 172 nvdd_dr yice tamper_a tamper_a dryice external tamper detect pins, active high. if either tamper_a or tamper_b asserted, then external tampering is detected. should be tied to pull-down if no tamper detection is required on board. 173 nvdd_dr yice tamper_b tamper_b 174 nvdd_dr yice mesh_c mesh_c wire-mesh tamper detect pins which can be routed at the pcb board to detect attempted tampering of a protected wire. mesh_c is active high and should be connected to an on-board pull-down if no tamper detection is required. mesh_d is active low and should be connected to an on-board pull-up if no tamper detection is required. 175 nvdd_dr yice mesh_d mesh_d 176 3v3 a [2] a [2] 177 3v3 a [3] a [3] 178 3v3 a [4] a [4] 179 3v3 a [5] a [5] 180 3v3 a [6] a [6] 181 3v3 a [7] a [7] 182 3v3 a [8] a [8] 183 gnd gnd 184 analog ref ref touchscreen adc external reference voltage (2.5 v). ref may be left floating if the internally generated 2.5 v supply is enabled. use of an external reference is recommended. 185 analog xn xn touscreen adc input channels 186 analog xp xp 187 analog yn yn 188 analog yp yp 189 analog wiper wiper 190 analog inaux0 inaux0 general purpose measurements channels 191 analog inaux1 inaux1 192 analog inaux2 inaux2 193 power nvcc_dryice nvcc_dryice dryice power supply output. source can be soc supply or backup supply. this pin can be used to power external tamper detect components. 194 3v3 a [9] a [9] 195 3v3 a [11] a [11] 196 3v3 a [12] a [12] 197 nc not connected 198 nc not connected 199 nc not connected 200 gnd gnd gnd ka-ro electronics gmbh - pascalstr. 22, d-52076 aachen, germany - tel.: +49 2408 1402-0 (fax -10) www.karo-electronics.de
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