Il 02/03/2012 08:00, Zhang, Yang Z ha scritto:
> Use a timer to emulate update cycle. When update cycle ended and UIE is 
> setting, 
> then raise an interrupt. The timer runs only when UF or AF is cleared. 

Isn't AF=0 the common case when the RTC starts, so the timer always runs
until the time crosses midnight?

Paolo
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