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 ?