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MCF54415 Software Reset Failed

Question asked by Leo Cheng on Oct 14, 2015
Latest reply on Oct 19, 2015 by TomE

I came accross a problem that software reset fails.

 

System board:

The board uses serial boot facility to boot up, there is a 16MB SPI flash connected to SBF pins, and also the DSPI0 is used to connect another device.

 

Symptoms:

Spftware reset failed sometimes, but /RSTOUT pin will also be asserted (from high to low level).

 

Troubleshooting:

I found there is a strange phenomenon, There is no problem and software reset is always OK if DSPI0 is never used(not communicate with the external SPI device), while software reset shall be failed sometimes if DSPI0 is used before.

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