ESP32-SL specification V1.0
C
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XVI
4. Use of GPIO port
(1) Some GPIO ports are led out of the periphery of the module. If you need to use a
10-100 ohm resistor in series with the IO port is recommended. This can suppress
overshoot, and the level on both sides is more stable. Help both EMI and ESD.
(2) For the up and down of the special IO port, please refer to the instruction manual of
the specification, which will affect the startup configuration of the module.
(3) The IO port of the module is 3.3V. If the IO level of the main control and the module
does not match, a level conversion circuit needs to be added.
(4) If the IO port is directly connected to the peripheral interface, or the pin header and
other terminals, it is recommended to reserve ESD devices near the terminal of the IO
trace.
Image
Level shift circuit
