for ESP32-S3-dat - ESP32-dat - HDK-dat - peripherals-dat - interface-dat - ADC-dat - DAC-dat - I2C-dat - serial-dat - gpio-dat - usb-sdk-dat - SPI-dat - I2S-dat - PDM-dat - DMA-dat - ISR-dat - Interrupt-dat - RMT-dat - PWM-dat
board
interface
pins
The ESP32-S3 features a GPIO Matrix. This internal switching fabric allows you to route almost any internal peripheral signal (like I2S, PWM, or UART) to almost any physical GPIO pin (GPIO 0 through 48).
- I2S0: Can be mapped to any available GPIO.
- I2S1: Can also be mapped to any available GPIO.
built-in USB JTAG
IDF list
- ESP32-S3 chip (via builtin USB-JTAG)
- ESP32-S3 chip (via builtin USB-JTAG)
- ESP32-S3 chip (via ESP-PROG)
- ESP32-S3 chip (via ESP-PROG-2)
- Custom board
✅ Supported Features
The ESP32-S3 includes a USB Serial/JTAG Controller, meaning:
- ✅ Built-in USB JTAG debugging — no need for an external debugger.
- ✅ USB Serial for logs and communication.
- ✅ USB DFU / flashing support.
- ✅ All over a single USB connection.
🔌 Hardware Connections
Make sure the native USB pins are used:
| Function | GPIO Pin |
|---|---|
| USB D+ | GPIO19 |
| USB D− | GPIO20 |
⚠️ These pins must not be remapped or disabled in software if using USB JTAG.
🧰 Setup for Debugging with OpenOCD
- Install ESP-IDF (v4.4 or later recommended, v5.x best).
- Connect ESP32-S3 to your PC via USB (native USB, not UART).
- Run OpenOCD with:
openocd -f interface/esp_usb_jtag.cfg -f board/esp32s3.cfgUse GDB, VS Code, or Eclipse for debugging.
S2 / S3 modules
min. Core
common issues
Quad vs. Octal SPI
| Feature | Quad SPI (Standard) | Octal SPI (OPI) |
|---|---|---|
| Data Lines | 4 ($D_0$–$D_3$) | 8 ($D_0$–$D_7$) |
| GPIOs 33–37 | Often available | Reserved / Internal |
| Performance | Standard | High-speed throughput |
Note: If you are using a standard Quad SPI module (like the basic N4 or N8 models without the "R8" suffix), these pins might be physically broken out to the header, but it is still best practice to check the specific datasheet for your module variant to ensure they aren't tied to internal PSRAM.
However, GPIO 33–37 are reserved for the Octal SPI flash interface on many ESP32-S3 modules (e.g. ESP32-S3-WROOM-1 with OPI flash). This means GPIO 37 (LF_PIN) likely conflicts with the flash bus and cannot be used for servo output.
GPIO 38 (LR_PIN) should be fine on most ESP32-S3 modules.