## 1 The ESP32-S3 support use the JTAG pins or USB pins for JTAG debugging. For more instructions，please read the “ESP32-S3 JTAG Debugging ”guide.

• The ESP32-S3 JTAG pins are GPIO39~GPIO42, please read the "ESP32-S3 pins and JTAG signals " instructions.

For debugging with JTAG pins, you need to use the ESP-PROG tool.

• ESP32-S3 has a built-in JTAG circuitry and can be debugged without any additional chip. Only an USB cable connected to the D+/D- pins is necessary. The necessary connections are shown in the following section. Please read the "Configure ESP32-S3 built-in JTAG Interface " instructions.

2 Before JTAG debugging , please set up the esp-idf SDK software environment. please refer to the "ESP-IDF Programming Guide " .The ESP32-S3 only supports release/v4.4 and later version of the ESP-IDF SDK. Please refer to the “ESP-IDF Release and SoC Compatibility” instructions.

The software development environment we recommend to you is the simplest.

• For windows ,You can use “ESP-IDF Tools Installer ” to install ESP-IDF SDK Environment . Please refer to the “Set up the ESP-IDF SDK compilation environment + Visual Studio Code software programming environment” guide.

• For Ubuntu（We recommend） ， Please read "Standard Setup of Toolchain for Linux " instructions. You can also refer to the “How to set up the software development environment ESP-IDF for ESP32-S3” guide.

3 The following are the JTAG debugging steps:

• Under the esp-idf SDK compilation environment, to open the “openocd” environment，Please refer to the "Run OpenOCD " . For example，

openocd -f C:\Users\caiguanhong\.espressif\tools\openocd-esp32\v0.10.0-esp32-20211111\openocd-esp32\share\openocd\scripts\board\esp32s3-builtin.cfg

• Next , to flash the firmware：

idf.py flash

• Then , Under the current debug project, create a configuration file named “gdbinit” and write the following. Please read the “Command Line ” instructions.

target remote :3333
set remote hardware-watchpoint-limit 2
mon reset halt
flushregs
thb app_main
c

• Last ， to enable the “GDB” environment. Please refer to “” . For example,

xtensa-esp32s3-elf-gdb -x gdbinit build\hello_world.elf

4. The BSDL file can refer to “openocd-esp32 ” Source Code.