| Pin | $PINS | Address | Mode | Name | Use |
|---|---|---|---|---|---|
| P8.1 | DGND | Digital Ground | |||
| P8.2 | DGND | Digital Ground | |||
| P8.3 | (allocated emmc2) | ||||
| P8.4 | (allocated emmc2) | ||||
| P8.5 | (allocated emmc2) | ||||
| P8.6 | (allocated emmc2) | ||||
| P8.7 | (unused) | ||||
| P8.8 | (unused) | ||||
| P8.9 | 39 | 0x89c/09c | 7 | GPIO 69 In | Available |
| P8.10 | 38 | 0x898/098 | 7 | GPIO 68 In | Available |
| P8.11 | 13 | 0x834/034 | 7 | GPIO 45 In | Available |
| P8.12 | 12 | 0x830/030 | 7 | GPIO 44 Out | ms timing test |
| P8.13 | 9 | 0x824/024 | 7 | GPIO 23 Out | 1 s timing test |
| P8.14 | 10 | 0x828/028 | 7 | GPIO 26 Out | AI out of range |
| P8.15 | (unused) | ||||
| P8.16 | (unused) | ||||
| P8.17 | (unused) | ||||
| P8.18 | (unused) | ||||
| P8.19 | (unused) | ||||
| P8.20 | (allocated emmc2) | ||||
| P8.21 | (allocated emmc2) | ||||
| P8.22 | (allocated emmc2) | ||||
| P8.23 | (allocated emmc2) | ||||
| P8.24 | (allocated emmc2) | ||||
| P8.25 | (allocated emmc2) | ||||
| P8.26 | (unused) | ||||
| P8.27 | 31 | 0x8e0/0e0 | 6 | pr1_pru1_pru_r31_8 | Data ready |
| P8.28 | 56 | 0x8d8/0d8 | 6 | pr1_pru1_pru_r31_10 | Spare, pulled high |
| P8.29 | 58 | 0x8e4/0e4 | 6 | pr1_pru1_pru_r31_9 | Over/under flow |
| P8.30 | 57 | 0x8ec/0ec | 6 | pr1_pru1_pru_r31_11 | STOP |
| P8.31 | (unused) | ||||
| P8.32 | (unused) | ||||
| P8.33 | (unused) | ||||
| P8.34 | (unused) | ||||
| P8.35 | (unused) | ||||
| P8.36 | (unused) | ||||
| P8.37 | (unused) | ||||
| P8.38 | (unused) | ||||
| P8.39 | 46 | 0x8b8/0b8 | 6 | pr1_pru1_pru_r31_6 | Low byte, bit 6 |
| P8.40 | 47 | 0x8bc/0bc | 6 | pr1_pru1_pru_r31_7 | Low byte, bit 7 |
| P8.41 | 44 | 0x8b0/0b0 | 6 | pr1_pru1_pru_r31_4 | Low byte, bit 4 |
| P8.42 | 45 | 0x8b4/0b4 | 6 | pr1_pru1_pru_r31_5 | Low byte, bit 5 |
| P8.43 | 42 | 0x8a8/0a8 | 6 | pr1_pru1_pru_r31_2 | Low byte, bit 2 |
| P8.44 | 43 | 0x8ac/0ac | 6 | pr1_pru1_pru_r31_3 | Low byte, bit 3 |
| P8.45 | 40 | 0x8a0/0a0 | 6 | pr1_pru1_pru_r31_0 | Low byte, bit 0 |
| P8.46 | 41 | 0x8a4/0a4 | 6 | pr1_pru1_pru_r31_1 | Low byte, bit 1 |
| Pin | $PINS | Address | Mode | Name | Use |
|---|---|---|---|---|---|
| P9.1 | GND | Ground | |||
| P9.2 | GND | Ground | |||
| P9.3 | DC 3.3 V | ||||
| P9.4 | DC 3.3 V | ||||
| P9.5 | VDD_5 V | ||||
| P9.6 | VDD_5 V | ||||
| P9.7 | SYS_5 V | ||||
| P9.8 | SYS_5 V | ||||
| P9.9 | PWR_BUT | Power Button | |||
| P9.10 | SYS_RESETn | Reset Button | |||
| P9.11 | (unused) | ||||
| P9.12 | (unused) | ||||
| P9.13 | 29 | 0x874/074 | 7 | GPIO 31 Out | SPI SCLK |
| P9.14 | 18 | 0x848/048 | 7 | GPIO 50 Out | SPI CBS |
| P9.15 | 16 | 0x840/040 | 7 | GPIO 48 In | SPI SDO |
| P9.16 | 19 | 0x84c/04c | 7 | GPIO 51 Out | SPI SDI |
| P9.17 | (unused) | ||||
| P9.18 | (unused) | ||||
| P9.19 | 95 | 0x97c/17c | 3 | I2C2_SCL | /dev/i2c-1 |
| P9.20 | 94 | 0x978/178 | 3 | I2C2_SDA | /dev/i2c-1 |
| P9.21 | 85 | 0x954/154 | 1 | uart2_txd | RS232 port 2 txd |
| P9.22 | 84 | 0x950/150 | 1 | uart2_rxd | RS232 port 2 rxd |
| P9.23 | (unused) | ||||
| P9.24 | 97 | 0x984/184 | 0 | uart1_txd | RS232 port 1 & TTL port1 txd |
| P9.25 | 107 | 0x9ac/1ac | 6 | pr1_pru0_pru_r31_7 | High byte, bit 7 |
| P9.26 | 96 | 0x980/180 | 0 | uart1_rxd | RS232 port 1 & TTL port 1 rxd |
| P9.27 | 105 | 0x9a4/1a4 | 6 | pr1_pru0_pru_r31_5 | High byte, bit 5 |
| P9.28 | 103 | 0x99c/19c | 6 | pr1_pru0_pru_r31_3 | High byte, bit 3 |
| P9.29 | 101 | 0x994/194 | 6 | pr1_pru0_pru_r31_1 | High byte, bit 1 |
| P9.30 | 102 | 0x998/198 | 6 | pr1_pru0_pru_r31_2 | High byte, bit 2 |
| P9.31 | 100 | 0x990/190 | 6 | pr1_pru0_pru_r31_0 | High byte, bit 0 |
| P9.32 | VADC | 1.8 V Reference | |||
| P9.33 | AIN4 | LD_Mon | |||
| P9.34 | AGND | ADC Ground | |||
| P9.35 | AIN6 | BatV | |||
| P9.36 | AIN5 | Temp | |||
| P9.37 | AIN2 | LD_Temp | |||
| P9.38 | AIN3 | Laser_FB | |||
| P9.39 | AIN0 | POPS_Flow | |||
| P9.40 | AIN1 | Pump_FB | |||
| P9.41B | 109 | 0x9a8/1a8 | 6 | pr1_pru0_pru_r31_6 | High byte, bit 6 |
| P9.42B | 80 | 0x9a0/1a0 | 6 | pr1_pru0_pru_r31_4 | High byte, bit 4 |
| P9.43 | GND | ||||
| P9.44 | GND | ||||
| P9.45 | GND | ||||
| P9.46 | GND |