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by hlieberman 34 days ago
TagConnect or EdgeConnect ftw.
3 comments

Is there a standard for TTL-serial pinout on those? I'm not aware of one, only for SWD…
Yes. For about 98% of embedded, you want the pinout for the TC2030-FTDI-C232HD-DDHSP-0-DTR cable that has DTR and RTS on it for STM32, ESP32, and Arduino-style bootloaders. It's 3.3V only iirc. Power is delivered by the cable on pin 1 so leave that terminal disconnected if it's an issue.

You can "break glass" and get the off the shelf cable delivered overnight (and you can spec it if you need a spec cable) or you can make an adapter for the 6-pin tag-connect cable and the TTL-serial adapter that you have.

.100 headers tend to be smaller than most TagConnect/EdgeConnect footprints and you don't have to use expensive custom cables.

The alignment mechanisms on TagConnect/EdgeConnect negate any space advantage.

TagConnect is too fragile. Broken off way too many of the little plastic "hooks" that go through the board.