Adafruit ESP32-S3 Feather pinout
All 28 pins of the Adafruit ESP32-S3 Feather (8 MB flash, no PSRAM), each mapped to the ESP32-S3FN8 pad it routes to, with its functions and — for 22 pins — the electrical limits from the chip datasheet. Every number cites its page and table.
28 pins documented22 with electrical limits2 control2 power out1 ground21 gpio2 power incomplete pinout
Pin table
Markdown · JSONAdafruit ESP32-S3 Feather pins, functions and electrical limits
| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant | Abs max | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RST | JP1 (16-pin) · 1 | control | CHIP_PU | RESET | 2.475–3.6 V | -0.3–0.825 V | no | ESP32-S3 datasheet p.65 table 65_2 | |||||
| 3V | JP1 (16-pin) · 2 | power out | power_out | p.15 | |||||||||
| 3V | JP1 (16-pin) · 3 | power out | power_out | p.15 | |||||||||
| GND | JP1 (16-pin) · 4 | ground | ground | ||||||||||
| A0 | JP1 (16-pin) · 5 | gpio | GPIO18 | A0, GPIO18, PWM (LEDC, any pin), ADC2_CH7, U1RXD, CLK_OUT3, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO18 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| A1 | JP1 (16-pin) · 6 | gpio | GPIO17 | A1, GPIO17, PWM (LEDC, any pin), ADC2_CH6, U1TXD, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO17 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| A2 | JP1 (16-pin) · 7 | gpio | GPIO16 | A2, GPIO16, PWM (LEDC, any pin), XTAL_32K_N, ADC2_CH5, U0CTS, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO16 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| A3 | JP1 (16-pin) · 8 | gpio | GPIO15 | A3, GPIO15, PWM (LEDC, any pin), XTAL_32K_P, ADC2_CH4, U0RTS, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO15 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| A4 | JP1 (16-pin) · 9 | gpio | GPIO14 | A4, GPIO14, PWM (LEDC, any pin), TOUCH14, ADC2_CH3, FSPIDQS, SUBSPIWP, FSPIWP, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO14 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| A5 | JP1 (16-pin) · 10 | gpio | GPIO8 | A5, GPIO8, PWM (LEDC, any pin), TOUCH8, ADC1_CH7, SUBSPICS1, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO8 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| SCK | JP1 (16-pin) · 11 | gpio | GPIO36 | SCK, GPIO36, PWM (LEDC, any pin), SPI SCK, FSPICLK, SUBSPICLK, SPIIO7, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera) | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| MOSI | JP1 (16-pin) · 12 | gpio | GPIO35 | MOSI, GPIO35, PWM (LEDC, any pin), SPI MOSI, FSPID, SUBSPID, SPIIO6, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera) | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| MISO | JP1 (16-pin) · 13 | gpio | GPIO37 | MISO, GPIO37, PWM (LEDC, any pin), SPI MISO, FSPIQ, SUBSPIQ, SPIDQS, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera) | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| RX | JP1 (16-pin) · 14 | gpio | GPIO38 | RX, GPIO38, PWM (LEDC, any pin), UART RX, FSPIWP, SUBSPIWP, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera) | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| TX | JP1 (16-pin) · 15 | gpio | GPIO39 | TX, GPIO39, PWM (LEDC, any pin), UART TX, MTCK, CLK_OUT3, SUBSPICS1, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera) | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| DB | JP1 (16-pin) · 16 | gpio | GPIO43 | DB, GPIO43, PWM (LEDC, any pin), debug serial TX (UART0 TXD0), U0TXD, CLK_OUT1, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera) | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| BAT | JP3 (12-pin) · 1 | power in | power_in | p.14 | |||||||||
| EN | JP3 (12-pin) · 2 | control | 3V3 regulator enable | ||||||||||
| USB | JP3 (12-pin) · 3 | power in | power_in | p.15 | |||||||||
| D13 | JP3 (12-pin) · 4 | gpio | GPIO13 | D13, GPIO13, PWM (LEDC, any pin), red LED #13, TOUCH13, ADC2_CH2, FSPIIO7, SUBSPIQ, FSPIQ, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO13 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| D12 | JP3 (12-pin) · 5 | gpio | GPIO12 | D12, GPIO12, PWM (LEDC, any pin), TOUCH12, ADC2_CH1, FSPIIO6, SUBSPICLK, FSPICLK, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO12 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| D11 | JP3 (12-pin) · 6 | gpio | GPIO11 | D11, GPIO11, PWM (LEDC, any pin), TOUCH11, ADC2_CH0, FSPIIO5, SUBSPID, FSPID, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO11 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| D10 | JP3 (12-pin) · 7 | gpio | GPIO10 | D10, GPIO10, PWM (LEDC, any pin), TOUCH10, ADC1_CH9, FSPIIO4, SUBSPICS0, FSPICS0, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO10 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| D9 | JP3 (12-pin) · 8 | gpio | GPIO9 | D9, GPIO9, PWM (LEDC, any pin), TOUCH9, ADC1_CH8, SUBSPIHD, FSPIHD, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO9 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| D6 | JP3 (12-pin) · 9 | gpio | GPIO6 | D6, GPIO6, PWM (LEDC, any pin), TOUCH6, ADC1_CH5, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO6 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| D5 | JP3 (12-pin) · 10 | gpio | GPIO5 | D5, GPIO5, PWM (LEDC, any pin), TOUCH5, ADC1_CH4, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO5 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| SCL | JP3 (12-pin) · 11 | gpio | GPIO4 | SCL, GPIO4, PWM (LEDC, any pin), I2C SCL (5k pull-up, shared with STEMMA QT), TOUCH4, ADC1_CH3, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO4 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
| SDA | JP3 (12-pin) · 12 | gpio | GPIO3 | SDA, GPIO3, PWM (LEDC, any pin), I2C SDA (5k pull-up, shared with STEMMA QT), TOUCH3, ADC1_CH2, GPIO matrix (any routable peripheral signal: UART, I2C, I2S, LEDC PWM, MCPWM, RMT, PCNT, TWAI, SPI, LCD/camera), RTC_GPIO3, sar_i2c_sda_1 | 2.475–3.6 V | -0.3–0.825 V | ≥ 2.64 V | ≤ 0.33 V | 40 mA typ | 28 mA typ | no | -0.3–3.6 V | ESP32-S3 datasheet p.65 table 65_2 |
Answers from the record
Adafruit ESP32-S3 Feather pinout FAQ
What microcontroller does the Adafruit ESP32-S3 Feather use?
The Adafruit ESP32-S3 Feather is built around the ESP32-S3FN8, alongside ESP32-S3, MCP73831, MAX17048, AP2112K-3.3 / RT9080-3.3.
How many GPIO pins does the Adafruit ESP32-S3 Feather have?
21 GPIO pins are exposed. Xirkit documents 28 board pins, 22 of them with pin-level electrical limits.
Are the Adafruit ESP32-S3 Feather I/O pins 5 V tolerant?
No. The I/O pins are not 5 V tolerant — they run at 3.3 V logic; use a level shifter for 5 V signals. Input-high threshold: 2.475–3.6 V.
How much current can a Adafruit ESP32-S3 Feather GPIO pin source?
Documented output-high current per pin: 40 mA typ. Values are traced to the chip datasheet; see the pinout table for per-pin limits and conditions.
What voltage powers the Adafruit ESP32-S3 Feather?
Supply range 3.7–5 V. Power inputs: BAT (3.7–4.2 V), USB.
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