NO CAN Communication in NXP DEVKITCOMM BOARD

[SAchary11]

Actually I have 2 questions related to the NXP DEVKIT- MPC5748G and NXP DEVKIT- COMM Board

1) I have observed that when there is a USB/UART connector, I see that proper communication in the CAN A, CAN B and CANC of the Devkit COMM(I mean all the channels), if I change the jumper and use only external power supply CAN channels are not acknowledging to the frame sent from the other ECU

I have changed the Jumper to the external 12V supply as per the Schematic.

Can anyone tell what could be the reason for it? 

[PetrS]

Hi,

try to check supply pins on COMM board. If VDD and P5V0 are correct then there should not be issue I think.

BR, Petr