1.5.1 Pinout
The following table provides the pinout for the X32 Audio Interface. See Schematics for additional information.
| Pin Number | Name | Description | Interface |
|---|---|---|---|
| 1 | GND | Ground | Power |
| 2 | GND | Ground | Power |
| 3 | UART RX | UART RX, receive to MCU from DB | UART |
| 4 | UART CTS | UART Clear to send | UART |
| 5 | UART TX | UART TX, transmit from MCU to DB | UART |
| 6 | UART RTS | UART Ready to send | UART |
| 7 | I2C SCL | Clock line for I2C interface. | I2C |
| 8 | STBY/RST | Standby/Reset control | GPIO |
| 9 | I2C SDA | Data line for I2C interface. | I2C |
| 10 | Audio WS/LRCLK | Audio Word Select/Left Right Clock | I2S |
| 11 | Audio In | Audio into MCU, out from codac | I2S |
| 12 | Audio CLK | Audio clock | I2S |
| 13 | Audio out | Audio out of MCU, into codac/DAC | I2S |
| 14 | REFCLK/MCK | Reference clock #1 | REFCLK |
| 15 | GND | Ground | Power |
| 16 | GND | Ground | Power |
| 17 | NC | Legacy hold over | – |
| 18 | +3.3v | VDD | Power |
| 19 | NC | Legacy hold over | – |
| 20 | +5.0v | VDD | Power |
| 21 (1) | NC | NC | – |
| 22 (2) | ADC/Card ID pin | Analog-to-Digital Converter to read voltage on the daughter card | 1-wire |
| 23 (3) | NC | NC | – |
| 24 (4) | NC | NC | – |
| 25 (5) | NC | NC | – |
| 26 (6) | NC | NC | – |
| 27 (7) | NC | NC | – |
| 28 (8) | NC | NC | – |
| 29 (9) | NC | NC | – |
| 30 (10) | NC | NC | – |
| 31 (11) | GND | Ground | Power |
| 32 (12) | GND | Ground | Power |