Exception handling on mpc8xx cores

Jaap-Jan Boor jjboor at aimsys.nl
Wed Dec 8 20:38:30 EST 2004

On Wed, 2004-12-08 at 05:15, Robin Gilks wrote:
> Greetings
> Any Freescale lurkers out there?
> The mpc866 manual implies that if the internal core times out an 
> external Transfer Acknowledge bus signal (by exerting the internally 
> generated Transfer Error Acknowledge signal) an exception is generated.
> I've tried extending the external TA signal well beyond 2040 clock 
> cycles the maximum timeout allows and I see the busses start up again 
> (indicationg that they are no longer waiting) but I don't see anything 
> on TEA and I don't get an exception thrown.
> Any clues? Manual error?, silicon error?, my brain error?

Did you enable the bus monitor in the SYPCR register?


> Cheers
J.G.J. Boor                       Anton Philipsweg 1
Software Engineer                 1223 KZ Hilversum
AimSys bv                         tel. +31 35 689 1941
Postbus 2194, 1200 CD Hilversum   mailto:jjboor at aimsys.nl

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