Hello,
I'm trying to flash a S32K311 MCU from NXP using two PEmicro Universal Multilink debuggers. With one of them, after connecting to the JTAG connector and powering up the MCU board, the current consumption of the MCU board seems normal and the flashing procedure works. With the other debugger, after connecting the JTAG and powering up the MCU board, a high current consumption is present and is limited by 30V PSU that supplies the MCU board.
What could be the cause of this? The same issue is present on other MCU boards, so it's unlikely the MCU board would be the cause.
Daniel,
It sounds like your USB Multilink Universal has a Vdd (power) to ground short. Can you confirm that with a multimeter?
Which revision of the USB Multilink Universal do you have?
Regards,
Johnny
PEmicro
I measured 120 Ohms between TVCC and GND for the faulty device and about 140kOhms for the device that works.
Does that mean the debugger is damaged? It worked before, with another MCU board with S32K394.
It is Revision E.
Daniel,
Yes your Multilink Universal Rev E is definitely damaged somehow. Any of the components connected to that Vdd pin could be causing the short. I recommend you trade in the device for a new one.
https://www.pemicro.com/products/product_viewDetails.cfm?product_id=15320176
Regards,
Johnny
PEmicro