ESP32 Forum

Hello, you have been working with ESP32C3N4 for a while. I'm drawing, but there are things in the datasheet that I can't understand.
1-Will the program be thrown with GPIO9? Are things running like the ESP32-S? There I was able to program when I pulled down GPIO0 and reset it. How do I put it here?


2- I want to do SPI Communication. But it doesn't say which pins I can use. Can I choose the pins I want? SPID, SPIQ, SPICLK etc. The use of pins such as is not recommended. Should I leave them blank?


3- I want to do I2C Communication. But it doesn't say which pins I can use. Any GPIO pin writes. Can I choose the pins I want?

- For bootstrap behaviour, GPIO9 on the C3 is the same as GPIO0 on other ESP32 chips.
- For SPI, you can use any GPIO. SPID, SPIQ etc are reserved for the internal flash, as the datasheet says, so do not use those.
- You can indeed use any pin for I2C.

Thank you so much. I want to ask you a question again. My model is ESP32C3N4;
1-Can we debug with USB and program with USB?
2-Can I use GPIO9 pin and CHIP_En pin as output? If I can, how should the wiring diagram be?
3- If we can't use the SPIQ, SPID, SPICLK, SPICS0, SPIWP, SPIHD terminals, why does it say 22 pin GPIO in the specifications? Is there no way we can use it?

You already asked that and I already answered.