| Pin | Name | Description |
|---|---|---|
| 1 | VLD0 3.3V OUT | 3.3V output for sensors |
| 2 | GND | Ground |
| 3 | IO_ADC0 | General IO, A/D converter |
| 4 | IO_ADC1 | General IO, A/D converter |
| 5 | IO_DAC0 | General IO, D/A converter |
| 6 | IO_DAC1 | General IO, D/A converter |
| 7 | SPI_MISO | SPI data in |
| 8 | SPI_MOSI | SPI data out |
| 9 | SPI_SCK | SPI clock |
| 10 | SPI_CS | SPI chip select |
| 11 | TWI_SDA | TWI/I2C data |
| 12 | TWI_SCL | TWI/I2C clock |
| 13 | UART_TX | Serial port transmit |
| 14 | UART_RX | Serial port receive |
| 15 | POWER_IN | 3-5 V power supply |
| 16 | GND | Ground |
| 17 | PDI_DATA | Programming and debug interface |
| 18 | 3.3V MCU | Programming and debug interface |
| 19 | RESET/PDI_CLK | Programming and debug interface |
| 20 | GND | Ground |
| Port Pin | MCU Function | Name | Comment |
|---|---|---|---|
| PORTA0 | ADC | POWER_VBAT_SENSE | Measures the battery voltage |
| PORTA1 | ADC | POWER_VUSB_SENSE | Measures the USB power connector voltage |
| PORTA2 | ADC | SENSOR_ADC0 | |
| PORTA3 | ADC | SENSOR_ADC1 | |
| PORTA4 | ADC | SENSOR_TEMP | Internal temperature sensor |
| PORTA5 | ADC | POWER_GOOD | |
| PORTA6 | ADC | POWER_DCDC_ENABLE | |
| PORTA7 | Not used | ||
| PORTB0 | Not used | ||
| PORTB1 | DAC | SENSOR_DAC0 | |
| PORTB2 | DAC | SENSOR_DAC1 | |
| PORTB3 | GPIO | UI_SWITCH | Board switch |
| PORTB4 | GPIO | UI_LED_GREEN | |
| PORTB5 | GPIO | UI_LED_RED | |
| PORTB6 | GPIO | UI_LED_YELLOW | |
| PORTB7 | GPIO | UI_LED_BLUE | |
| PORTC0 | SDA | SENSOR_SDA | Sensor interface TWI/I2C data |
| PORTC1 | SCL | SENSOR_SCL | Sensor interface TWI/I2C clock |
| PORTC2 | Not used | ||
| PORTC3 | Not used | ||
| PORTC4 | Not used (Dataflash Reset) | ||
| PORTC5 | MOSI | BLE_MOSI | |
| PORTC6 | MISO | BLE_MISO | |
| PORTC7 | SCK | BLE_SCK | |
| PORTD0 | GPIO | BLE_ACTIVE | |
| PORTD1 | GPIO | BLE_RESET | |
| PORTD2 | RXD | ANT_UART_TX | |
| PORTD3 | TXD | ANT_UART_RX | |
| PORTD4 | Not used (Dataflash CS) | ||
| PORTD5 | Not used (Dataflash MOSI) | ||
| PORTD6 | Not used (Dataflash MISO) | ||
| PORTD7 | Not used (Dataflash SCK) | ||
| PORTE0 | INPUT | BLE_RDYN | Data ready |
| PORTE1 | OUTPUT | BLE_REQN | Request to send |
| PORTE2 | RXD | BLE_TXD | BLE Test Interface |
| PORTE3 | TXD | BLE_RXD | BLE Test Interface |
| PORTE4 | OUTPUT | SENSOR_CS | SPI Chip Select |
| PORTE5 | MOSI | SENSOR_MOSI | |
| PORTE6 | MISO | SENSOR_MISO | |
| PORTE7 | SCK | SENSOR_SCK | |
| PORTF0 | Not used | ||
| PORTF1 | Not used | ||
| PORTF2 | RXD | SENSOR_RX | |
| PORTF3 | TXD | SENSOR_TX | |
| PORTF4 | OUTPUT | ANT_SUSPEND | |
| PORTF5 | OUTPUT | ANT_SLEEP | |
| PORTF6 | OUTPUT | ANT_RTS | |
| PORTF7 | OUTPUT | ANT_RESET |