Suggestion for enhancement #22
Description
I like the idea to use the (cheap, small, ..) AVX edge connector as a debug interface. I also found the information on debug-edge.io very clearly structured and inspiring.. Thanks for this.
Recently I added the edge connector to one of my target boards and found it a bit confusing how exactly the pin assignment is meant. I guess the drawing on debug-edge.io is a "view towards the target board"?
I know I could find out by opening the KiCad files, but for us out there without KiCad it's a bit difficult..
May I suggest to place a small note on the drawing?
I also have a suggestion to extend the meaning/description of some pin assignments:
Vref: I think this normally is meant to be output from the target board and used as a reference voltage for the interface drivers on the interface side.
However, I often use this to power the target board during production programming and I think many developers do it this way.. What about naming this "Vref/Vcc"? This also would suggest that it is "bidirectional".
TRACE0/1: If I'm correct the signals TRACE_CLK, TRACE0, TRACE1 are normally output from the target to the host. You already specified that TRACE0 can also be used as RX, which is input to the target, i.e. TRACE0/RX is bidirectional.
I would like to suggest to change the specification for the TRACE signals like this:
TRACE_CLK/TX (no change)
TRACE0/RX/IO0 (added IO0, suggest use as general purpose bidirectional I/O)
TRACE1/IO1 (added IO1, suggest use as general purpose bidirectional I/O)
This would then look like this:
