Flash/CPU error on S32K1xx

sero — Mon, 08 Feb 2021 12:42:02 GMT

Hello Together,

i have some problems with a S32K142

I was able to debug and flash the device for quite some time.

Now, after i had some connection problems, i can still connect to the Debug-Interface (via Segger Jlink) but it tells me that the either CPU cannot be halted or that the device is in permanent reset .
After connecting the reset-pin to GND and another access via Jlink, I tried to unlock the device (which was successful).

After this, i can - sometimes - access the memory, but it keeps changing the content which is shown.

erase/flash/etc. is not possible

I tried SWD and JTAG, i also changed the speed.

As far as i can see from the datasheet, the device cannot start the internal RC Oscillator to provide a clock to the CPU and the memory.

To give some more hint: because i had an error in the design, i provided a signal on a pin before i had a power connected. I resolved the problem, so this was not happening any more at the time the above error occured.

Is it possible that i ruined the port or the oscillator unit with the "supply via ESD Diode"?

It doesn't seem that i had a latch-up because the ports still worked fine (and the connection via SWD/JTAG is still possible).

Thanks for your help

Roland

Re: Flash/CPU error on S32K1xx

sero — Mon, 08 Feb 2021 15:29:17 GMT

@admin: can you delete this please? i moved it to S32K subforum

Kinetis MicrocontrollersのトピックRe: Flash/CPU error on S32K1xx

Flash/CPU error on S32K1xx

Re: Flash/CPU error on S32K1xx