> Or is it more recomendable to use an RTC-on-a-chip like the
> ones from Dallas (DS1307)? What is the more common/cheap/
> simple RTC that uses I2C?

Philips PCF8573, PCF8583 and others

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu