Sujith Nair

Does not interface with perepheral when self powered

Discussion created by Sujith Nair on Oct 12, 2006
Latest reply on Oct 16, 2006 by Daniel Malik

I am using S12DP512 and Codewarrior 4.5 and have this very wierd problem. When I have the P&E BDM connected and I execute the program, everything works fine. But once the code is downloaded and I power the microcontroller board by itself, it fails to programm the DAC.

I have a few other perifpherals like two UART ports connected to RS485 chips, a 16 bit ADC etc.. All of them work, except the DAC!

What could the problem likely be? I have broken my head on it and can't think of any more things to try.