| Pin | Name | Function | Type |
|---|---|---|---|
| D0 | GPIO16 | Wake / GPIO | GPIO |
| D1 | GPIO5 | I2C SCL / GPIO | I2C/GPIO |
| D2 | GPIO4 | I2C SDA / GPIO | I2C/GPIO |
| D3 | GPIO0 | Flash / GPIO | GPIO |
| D4 | GPIO2 | TX1 / LED / GPIO | GPIO |
| D5 | GPIO14 | SPI CLK / GPIO | SPI/GPIO |
| D6 | GPIO12 | SPI MISO / GPIO | SPI/GPIO |
| D7 | GPIO13 | SPI MOSI / GPIO | SPI/GPIO |
| D8 | GPIO15 | SPI CS / GPIO | SPI/GPIO |
| RX | GPIO3 | UART RX | UART |
| TX | GPIO1 | UART TX | UART |
| A0 | ADC0 | Analog Input (10-bit, 0-1V) | Analog |
| 3V3 | 3V3 | 3.3V Power | Power |
| GND | GND | Ground | Ground |
| VIN | VIN | 5V USB Input | Power |
| Pin | Name | Function | Type |
|---|---|---|---|
| GPIO0 | Boot | Boot Mode / ADC2_1 / Touch1 | GPIO |
| GPIO2 | LED | Built-in LED / ADC2_2 / Touch2 | GPIO |
| GPIO4 | GPIO4 | ADC2_0 / Touch0 | GPIO/Analog |
| GPIO5 | SS | SPI SS / VSPI CS | SPI/GPIO |
| GPIO12-15 | HSPI | HSPI Bus / ADC2 | SPI/Analog |
| GPIO16 | RX2 | UART2 RX | UART |
| GPIO17 | TX2 | UART2 TX | UART |
| GPIO18 | SCK | VSPI CLK | SPI |
| GPIO19 | MISO | VSPI MISO | SPI |
| GPIO21 | SDA | I2C Data | I2C |
| GPIO22 | SCL | I2C Clock | I2C |
| GPIO23 | MOSI | VSPI MOSI | SPI |
| GPIO25 | DAC1 | DAC Channel 1 / ADC2_8 | Analog |
| GPIO26 | DAC2 | DAC Channel 2 / ADC2_9 | Analog |
| GPIO32-39 | ADC1 | ADC1 Channels (input only: 34-39) | Analog |
| 3V3 | 3V3 | 3.3V Power | Power |
| GND | GND | Ground | Ground |
| VIN | VIN | 5V Input | Power |
| Pin | Name | Function | Type |
|---|---|---|---|
| PA0-PA7 | Port A | GPIO / ADC / UART / Timer | GPIO/Analog |
| PA8-PA12 | Port A | GPIO / USB / Timer | GPIO |
| PA9 | USART1_TX | UART1 Transmit | UART |
| PA10 | USART1_RX | UART1 Receive | UART |
| PB0-PB1 | ADC | Analog Input (12-bit) | Analog |
| PB6 | I2C1_SCL | I2C Clock | I2C |
| PB7 | I2C1_SDA | I2C Data | I2C |
| PB13 | SPI2_SCK | SPI Clock | SPI |
| PB14 | SPI2_MISO | SPI MISO | SPI |
| PB15 | SPI2_MOSI | SPI MOSI | SPI |
| PC13 | LED | Built-in LED (active low) | GPIO |
| 3.3V | 3V3 | 3.3V Power | Power |
| GND | GND | Ground | Ground |
| 5V | 5V | 5V Input (USB) | Power |
| Pin | Name | Function | Type |
|---|---|---|---|
| 0 | RX1 | Serial1 RX / GPIO | UART/GPIO |
| 1 | TX1 | Serial1 TX / GPIO | UART/GPIO |
| 2-9 | PWM | PWM / GPIO | GPIO/PWM |
| 10 | CS | SPI CS / GPIO | SPI/GPIO |
| 11 | MOSI | SPI MOSI / GPIO | SPI/GPIO |
| 12 | MISO | SPI MISO / GPIO | SPI/GPIO |
| 13 | SCK/LED | SPI Clock / LED | SPI/GPIO |
| 14-23 | A0-A9 | Analog Input (10-bit) / GPIO | Analog/GPIO |
| 18 | SDA | I2C Data / A4 | I2C/Analog |
| 19 | SCL | I2C Clock / A5 | I2C/Analog |