ESP32-S3-PICO-1 Issues

[r758432]

Hi,

I recently purchased a pack of ESP32-S3-PICO-1 SIPs. However, I cannot establish USB connection with them. I have previously connected to other S3 modules, and I am wondering if there is some issue with the PICO that is preventing me from connecting to it. I have attached an image of how it is connected on my PCB, and can confirm that all voltages provided are as they should be. Have I made a mistake on my PCB, is there a known errata on the USB interface or is this likely a soldering issue?

Thanks

S3PICO.png (482.43 KiB) Viewed 1578 times

[ESP_Sprite]

Do you have access to the U0TxD pin? If so, do you see serial chatter on that when you apply power to the board? Also, can you post the schematics?

[r758432]

Here is the schematic. I can confirm that the power supply is stable.

I can't access the UART right now, but should be able to Monday.

I can't see anything on the USB monitor, even in the wrong boot mode or corrupted previous S3 boards would have some kind of ping when plugged in.

Could it be that VDD_SPI needs to be connected to something? Or does USB need to be enabled somehow?

Schematic.png (174.99 KiB) Viewed 1470 times

[r758432]

Well, this is embarrasing. I don't seem to have given the SIP a ground connection.

I'm very sorry for anyone's time I may have wasted, I'll update once I've added a ground wire

[r758432]

Final update:
It works, I simply forgot to ground the EP pad

[ESP_Sprite]

No worries, shit happens, glad you found the issue!