John bob

RTC registers dont function if SuperCap drained? (MCF52210)

Discussion created by John bob on Aug 13, 2008
Latest reply on Aug 13, 2008 by John bob
Hi, I'm using the M52210DEMO board and the RTC in the processor runs fine, but when the board hasn't been powered in a long time and then is powered the RTC clock just doesnt work.  Values can't even be written to the registers.  The only thing I can think of is that it has to wait for the Supercap to charge.  Because after active for I donno 10 mins the clock begins to run again.
 
Anyone know how to prevent this?
 
Thanks


Message Edited by joey c on 2008-08-13 09:38 AM

Outcomes