# Pinout

| Pin Number | Pin Name   | Type  | Function Description                        |
|------------|------------|-------|--------------------------------------------|
| 1          | 3V3       | P     | 3.3 V Power                                |
| 2          | 3V3       | P     | 3.3 V Power                                |
| 3          | RST       | I     | Reset Pin                                  |
| 4          | GPIO4     | I/O/T | RTC GPIO 4, GPIO 4, TOUCH 4, ADC1_CH3     |
| 5          | GPIO5     | I/O/T | RTC GPIO 5, GPIO 5, TOUCH 5, ADC1_CH4     |
| 6          | GPIO6     | I/O/T | RTC GPIO 6, GPIO 6, TOUCH 6, ADC1_CH5     |
| 7          | GPIO7     | I/O/T | RTC GPIO 7, GPIO 7, TOUCH 7, ADC1_CH6     |
| 8          | GPIO15    | I/O/T | RTC GPIO 15, GPIO 15, U0RTS, ADC2_CH4     |
| 9          | GPIO16    | I/O/T | RTC GPIO 16, GPIO 16, U0CTS, ADC2_CH5     |
| 10         | GPIO17    | I/O/T | RTC GPIO 17, GPIO 17, U1TXD, ADC2_CH6     |
| 11         | GPIO18    | I/O/T | RTC GPIO 18, GPIO 18, U1RXD, ADC2_CH7     |
| 12         | GPIO8     | I/O/T | RTC GPIO 8, GPIO 8, TOUCH 8, ADC1_CH7     |
| 13         | GPIO3     | I/O/T | RTC GPIO 3, GPIO 3, TOUCH 3, ADC1_CH2     |
| 14         | GPIO46    | I/O/T | GPIO 46                                    |
| 15         | GPIO9     | I/O/T | RTC GPIO 9, GPIO 9, TOUCH 9, ADC1_CH8     |
| 16         | GPIO10    | I/O/T | RTC GPIO 10, GPIO 10, TOUCH 10, ADC1_CH9  |
| 17         | GPIO11    | I/O/T | RTC GPIO 11, GPIO 11, ADC2_CH0             |
| 18         | GPIO12    | I/O/T | RTC GPIO 12, GPIO 12, ADC2_CH1             |
| 19         | GPIO13    | I/O/T | RTC GPIO 13, GPIO 13, ADC2_CH2             |
| 20         | GPIO14    | I/O/T | RTC GPIO 14, GPIO 14, ADC2_CH3             |
| 21         | 5V        | P     | 5 V Power                                  |
| 22         | GND       | G     | Ground                                      |

## J3 Pin Header Definitions

| Pin Number | Pin Name   | Type  | Function Description                        |
|------------|------------|-------|--------------------------------------------|
| 1          | GND       | G     | Ground                                      |
| 2          | TX        | I/O/T | U0TXD, GPIO 43, CLK_OUT1                   |
| 3          | RX        | I/O/T | U0RXD, GPIO 44, CLK_OUT2                   |
| 4          | GPIO1     | I/O/T | RTC GPIO 1, GPIO 1, TOUCH 1, ADC1_CH0     |
| 5          | GPIO2     | I/O/T | RTC GPIO 2, GPIO 2, TOUCH 2, ADC1_CH1     |
| 6          | GPIO42    | I/O/T | MTMS, GPIO 42                              |
| 7          | GPIO41    | I/O/T | MTDI, GPIO 41                              |
| 8          | GPIO40    | I/O/T | MTDO, GPIO 40                              |
| 9          | GPIO39    | I/O/T | MTCK, GPIO 39, CLK_OUT3                   |
| 10         | GPIO38    | I/O/T | FSPIWP, GPIO 38, RGB LED                  |
| 11         | GPIO37    | I/O/T | SPIDQS, GPIO 37, FSPIQ                    |
| 12         | GPIO36    | I/O/T | SPIIO7, GPIO 36, FSPICLK                  |
| 13         | GPIO35    | I/O/T | SPIIO6, GPIO 35, FSPID                    |
| 14         | GPIO0     | I/O/T | RTC GPIO 0, GPIO 0                         |
| 15         | GPIO45    | I/O/T | GPIO 45                                    |
| 16         | GPIO48    | I/O/T | GPIO 48, SPICLK_N                          |
| 17         | GPIO47    | I/O/T | GPIO 47, SPICLK_P                          |
| 18         | GPIO21    | I/O/T | RTC GPIO 21, GPIO 21                       |
| 19         | GPIO20    | I/O/T | RTC GPIO 20, GPIO 20                       |
| 20         | GPIO19    | I/O/T | RTC GPIO 19, GPIO 19                       |
| 21         | GND       | G     | Ground                                      |
| 22         | GND       | G     | Ground                                      |

![Img](./media/img-20250318162525.png)

## Pin Type Description

- **P**: Power Pin.
- **G**: Ground Pin.
- **I**: Input Pin.
- **O**: Output Pin.
- **T**: Tri-state Pin.

## Functional Block Diagram

![](./media/img-20250318162746.png)