At 07:02 17/05/99 +0200, you wrote:
>Leo TImmer wrote:
>> 
>> Philips offers the PCF8553 clock/calendar with 240*8bit ram and the PCF8593
>> low power version with 8byte ram. Try
>> http://www-us.semiconductors.philips.com/
>> Leo
>
>It is a nice chip, but watch out - if you inadvertantly 
>write '11' to the setup bits, you're screwed. '11' Puts 
>the chip into a test mode, and you have to power-cycle 
>it to get it to recover. This 'feature' is pretty 
>dangerous if you have a volume application.
>
>-- 
>Friendly Regards          /"\
>                          \ /
>Tjaart van der Walt        X  ASCII RIBBON CAMPAIGN
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>

Hey, Tjaart; why should there be a difference between a one off application
and a "Volume" application in this case?
Nasty features like that can cause trouble at any point in time. Could be
interesting if your micro has taken a long walk of a short pier into the
inevitable bliss of electronic wonderland. There be no recovery for this
one opps, no defensive code recovery eh?

Dennis