Reason for pinout on nRFDongle Pin Header vs. Tag Connect

RE: Reason for pinout on nRFDongle Pin Header vs. Tag Connect

Håkon Alseth — Fri, 23 Feb 2024 08:38:13 GMT

Some debuggers are able to supply voltage to the DUT. This is why the VBUS is recommended routed out when using the TC layout.

Kind regards,

Håkon

RE: Reason for pinout on nRFDongle Pin Header vs. Tag Connect

parksj10 — Fri, 23 Feb 2024 06:45:04 GMT

Håkon Alseth just got back to the board design 🙂, did you happen to know why VBUS only exists on the TC, whereas the pin header has pin 5 to ground?

RE: Reason for pinout on nRFDongle Pin Header vs. Tag Connect

Håkon Alseth — Tue, 30 Jan 2024 08:55:52 GMT

The only pins that you strictly need for programming is SWDIO + SWDCLK and GND. A RESET command can be sent over SWD.

Kind regards,

Håkon

RE: Reason for pinout on nRFDongle Pin Header vs. Tag Connect

parksj10 — Mon, 29 Jan 2024 17:58:20 GMT

Håkon Alseth , thanks for the response! I understand the number of pins is higher for JTAG than SWD, but it seems that the TC and 10 pin header are both operating under SWD, however it looks like VBUS only exists on TC, whereas reset only RESET only exists on 10 pin... I'm a little unclear on why these differences exists? Are they not both intended to work with e.g. jlink?

RE: Reason for pinout on nRFDongle Pin Header vs. Tag Connect

Håkon Alseth — Mon, 29 Jan 2024 11:16:54 GMT

Hi,

There are more gnd pins on the 10 pin swd header, as compared to the tag-connect TC2050-IDC.

Here's a recommendation on the pin out for both SWD and JTAG communication:

https://shop.collion.de/out/media/TC2050-ARM2010.pdf

Kind regards,

Håkon