How to use the PCA10028 or PCA10040 as a J-Link?

[Bee]

Hello everyone. I have both the two boards now. If I draw a PCB myself and want to use the Debug-out port to debug my PCB, what should I do? Which pin should be connected to VDD on my PCB? Need I use a knife to cut some wires of PCA10028 or PCA10040?

[Jørgen Holmefjord]

Hi,

The debug out port is described here. You need to connect SWCLK, SWDIO, VTG, and GND DETECT. In addition you need to power the external board. You do not need to cut anything, the OB J-Link will detect the exteranal board and flash this insted of the chip on the DK.

If you have som trouble getting this to work, try searching the other threads here at DevZone. There is a lot of questions and answers about this.

Best regards,

Jørgen

[Bee]

Thanks. It helps a lot.