github.com/vcc-gnd/YD-ESP32-S3/, YD-ESP32-S3 Core Board

Documentation

Boot Mode Selection
Configure Other JTAG Interfaces
Configure ESP32-S3 built-in JTAG Interface

• Burning STRAP_JTAG_SEL eFuse will enable selection of JTAG interface by a strapping pin, GPIO3. If the strapping pin is low when ESP32-S3 is reset, JTAG interface will use GPIO39-GPIO42. If the strapping pin is high, USB_SERIAL_JTAG will be used as the JTAG interface.

Strapping Pins

ESP32-S3 has four strapping pins:

• GPIO0
• GPIO45
• GPIO46
• GPIO3

ESP32-S3: Strapping pins undocumented pull-up resistors (IDFGH-8243) #9731
ESP32-S3-WROOM-2 Datasheet (PDF)