MKM34Z256VLL7 SWD interface

samdexter — Thu, 06 Oct 2016 14:00:30 GMT

Hi guys,

I've just finished a design of a board using MKM34Z256VLL7 and regretfully cannot program/debug it.

The SWD interface seems simple enough - all that it requires is Vtarget, GND, SWDIO and SWCLK.

However, I am not sure if it makes a use of RESET pin. Another thing is that the analog section on my

design is powered down.

So, I've got 2 questions:

1. Does SWD require RESET pin connected?

2. Does the micro have to be fully powered up, including the analog section in order to be programmed?

I presume it starts up with an internal oscillator (from the data sheet).

If anyone has any ideas please share...

Thank you very much.

Re: MKM34Z256VLL7 SWD interface

samdexter — Thu, 06 Oct 2016 17:07:22 GMT

Well, turns out I used wrong pin out for my j-link programming adapter...

Now, I guess, we know that the RESET pin is not required for SWD

and it does not matter if the analog section of the KM family powered

down.

Cheers.