esp32-pico design help

a22zsol
Posts: 6
Joined: Sat Aug 25, 2018 3:28 pm

esp32-pico design help

Postby a22zsol » Tue Aug 27, 2019 5:44 am

I am designing a proto based on esp32-pico, below is my pin configuration is it OK.

1.) Ethernet = GPIO25, GPIO26, GPIO0, GPIO13, GPIO22, GPIO21
2.) SD card = GPIO12, GPIO13, GPIO15, GPIO2, GPIO4
3.) SPI = GPIO11, GPIO6, GPIO7, GPIO8,
4.) UART0 = GPIO3, GPIO1
5.) UART1 = GPIO9, GPIO10,
6.) UART2 = GPIO16, GPIO17
7.) I2C = GPIO18, GPIO23

As some pins are used for BOOT strapping, how should i proceed.
Also esp32-pico has internal flash so are those pins reserved?

WiFive
Posts: 3529
Joined: Tue Dec 01, 2015 7:35 am

Re: esp32-pico design help

Postby WiFive » Tue Aug 27, 2019 7:37 am

Yes 6,7,8,11,16,17 are reserved for internal flash and strapping pins have the usual restrictions

a22zsol
Posts: 6
Joined: Sat Aug 25, 2018 3:28 pm

Re: esp32-pico design help

Postby a22zsol » Wed Aug 28, 2019 4:36 am

Will there be contention issue if i use GPIO18, GPIO23 for eth_phy(MDIO, MDC) and general purpose I2C?

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