> > Have you considered simply using a seperate RTC chip to track the > > time? >=20 > There are several accurate low-power I2C/SPI RTC ICs >=20 > eg http://www.maxim-ic.com/products/timers/ds3234.cfm >=20 I believe Microchip has one now too. --=20 Scanned by iCritical. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .