Please check my esp32-s3 pins

[munderwoods]

Hello! I am designing a board for work and it's my first time using an esp32. It's been a bit confusing figuring out which pins I am supposed to use, which I am not, and which is best for what. Could any of you take a quick look at what I'm doing here and tell me if there's anything obviously stupid?

I am using the esp32 module because I need a lot of connectivity options. I have a W5500 Ethernet circuit wired up on the SPI and a MAX3485 RS485 circuit on some gpio. The PISO and SIPO go to bit-shift registers in both directions.

2024-07-29-103155_1073x733_scrot.png (114.41 KiB) Viewed 1975 times

Thanks very much, any input is appreciated!

[jgustavoam]

Recommended reading:
https://www.espressif.com/sites/default ... ual_en.pdf

Chapter 30 - SPI Controller (SPI)

And :
https://docs.espressif.com/projects/esp ... l#ethernet

https://docs.espressif.com/projects/esp ... index.html

[RandomInternetGuy]

1) Before you build, prototype. Dev boards are faster and cheaper than the fastest and cheapest PCB house.

2) Reading datasheets is essential, as already answered, but also see. https://github.com/atomic14/esp32-s3-pinouts

[munderwoods]

Thanks guys, I'll read through this stuff. I did prototype a bunch, but it's damn hard to get the W5500 working, I just can't solder those tiny pins properly.

[munderwoods]

Thanks very much for the replies! The repo was super helpful. I had read a lot of the docs already, but they are fairly confusing and just thought since I had some trouble with it it would be smart to get another pair of eyes on it before I go to print. I have built many prototype boards for different modules of this PCB, and I have eliminated all my screw ups that actually broke stuff, but wanted to make sure there wasn't anything more subtle that might mess me up later down the line.