problems with MPC8xx internal RTC !?

[Frank Robbins]

Just an a side note  has the errata for the RTC been fixed on the MPC855T it
is not fixed on the 860T  and I believe this feature is now missing on
future MPC 866T, 857 variants.

If not it will draw several mA from your battery and discharge it very
quickly

Frank

----- Original Message -----
From: "Steven Scholz" <steven.scholz at imc-berlin.de>
To: "Linuxppc-Embedded" <linuxppc-embedded at lists.linuxppc.org>
Sent: Wednesday, January 29, 2003 9:05 AM
Subject: problems with MPC8xx internal RTC !?


>
> Hi there,
>
> I am using an MPC855T, external clocked with 16 MHz. Using the internal
PLLs it
> runs at 80MHz/40Mhz. An 32.768KHZ crystal is connected to clock the MPCs
> internal RTC. A battery is there as well.
>
> All seems to be fine. But I realized that the RTC runs too fast. It seems
to be
> releated to systems restarts.
>
> It tested. After 25 reboots the RTC is already SIX seconds ahead!!!
>
> rdate:   Wed Jan 29 10:03:58 2003
> date:    Wed Jan 29 10:04:04 CET 2003
> hwclock: Wed Jan 29 10:04:04 2003  0.000000 seconds
>
> Any ideas?
>
> Thanks,
>
> Steven
>
>
>


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