Strange behavior on FADS with ICTRL==0

Jim Lewis jlewis at
Sun Oct 10 01:18:37 EST 1999

Claude and Dan:

Thanks for the pointers. I do have an old chip and the erratta does describe this
problem. Shame on me for not having looked at the erratta!
-Jim Lewis

Claude Robitaille wrote:

> Check the version of the chip and change it to a B2 version if it is
> not it. You should be able to get a sample.
> Claude
> > Jim Lewis wrote:
> >
> >
> > > ........ If the ISCT_SER field of the
> > > ICTRL register is set to 0 (which is the value on reset), the system is
> > > very unstable.
> >
> > You have to be very careful with the configuration of 8xx control and
> > debug registers.  Depending upon the silicon revision, there are certain
> > errata that require explicit settings of these registers.  This is certainly
> > one of them.....some die require serialization to be set, others require you
> > never set it, others require subsequent software work around depending
> > upon the setting.
> >

** Sent via the linuxppc-embedded mail list. See

More information about the Linuxppc-embedded mailing list