Building a USB-C USB-UART Board

RE: Building a USB-C USB-UART Board

embeddedguy — Sun, 30 Jun 2024 18:25:41 GMT

Hi [mention:b0bc65b9ecdc4307bd967592f00e340a:e9ed411860ed4f2ba0265705b8793d05] ,

I wanted to ask about USB-C. Recently, I was looking to design a PCB and in USB-C connector I saw Tx/Rx lines. The specification states that it can be used as alternate mode. ie. can be used for other protocols such as HDMI, media etc.

Do you know weather these same pins can be used for UART?

RE: Building a USB-C USB-UART Board

procrastin8 — Wed, 29 Nov 2023 14:42:10 GMT

Thank you for this write-up, I'm using it for the basis of my own USB-C powered design. That said, I was wondering what are the purposes of the cap from one shield pin to ground and the resistor from the other shield pin to ground? Not seeing any recommendations in the data sheet for this part around this.

RE: Building a USB-C USB-UART Board

phoenixcomm — Wed, 28 Dec 2022 18:50:24 GMT

Nice job.. why the header? maybe a DB-9F?? BTW USB-RS232 New 10pcs MAX3232 RS232 to TTL Serial Port Module Converter Board for Arduino less than $10.00 US

RE: Building a USB-C USB-UART Board

DAB — Thu, 17 Feb 2022 20:09:38 GMT

Nicely done.

The USB C specification places a lot of hidden capability within what was once a simple serial data interface.

RE: Building a USB-C USB-UART Board

genebren — Thu, 17 Feb 2022 15:25:40 GMT

Very nice project! Wow, your hand soldering looks so good. I use the same diameter solder, and even with careful application, my joints are flooded with way more solder. What solder are you using?

I have finally upgraded my PC for USB-C (mainly to speed up my PicoScope), but if I get more USB-C ports, I can see where this will be a useful project to build.

Thanks for sharing.

RE: Building a USB-C USB-UART Board

wolfgangfriedrich — Thu, 17 Feb 2022 12:53:11 GMT

Nice. I especially like the all through hole USB-C connector. That is a part number to remember, good price too.

First I thought, it is even a PMOD compatible connector on the UART business end, but then it was missing 2 pins and with 3.3V and 5V at the same time, it is not really possible to do that.

RE: Building a USB-C USB-UART Board

embeddedguy — Thu, 17 Feb 2022 05:04:37 GMT

Good one.

You do not want to mention which PCB design software you are using?