ESP32-S3 GPIO20
GPIO20 / U1CTS / ADC2_CH9 / CLK_OUT1 / USB_D+
Use with care
- Fine for many uses, but check the warnings below first.
What GPIO20 can do
- Digital input/output
- ADC2 analog input (unusable while Wi-Fi is active)
- PWM output (LEDC)
- UART (via GPIO matrix)
- Native USB
Warnings for GPIO20
USB / Serial-JTAG
Part of the native USB (Serial/JTAG) interface. Avoid repurposing while USB is in use.
Open the interactive ESP32-S3 pinout →All ESP32-S3 pins
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ESP32 Pinout Studio - free interactive pinout reference. Pin data generated from Espressif's official KiCad libraries. esp32pin.com