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Error after hard reset of a MC68360 QUICC

Question asked by jeromeg2 on Dec 2, 2014
Latest reply on Dec 8, 2014 by TomE

Hi all,

 

I've got a problem when performing a hard reset on a board using a MC68360 QUICC.

Basically, I use PA6 as a RS485 RX signal and PA7 as TX.

When /RESETH is driven low and maintained at low level, I expect to see PA7 goes in High-Z even if RX frames continue to come to the board. But sometimes, PA7 doesn't seem to go in High-Z (it stays at previous level). Even worse, after some milliseconds, it echoes RX frames leading to a failure detected by the board that communicates with it.

What could be wrong with the QUICC ?

 

Best regards,

Jérôme

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