Hi, I have a question for anyone out there. I'm going to use the HT1380 as an RTC datasheet available at http://www.holtek.com.tw/pdf/consumer/1380_1.pdf I was originally using the DS1307, but this one is cheaper. Now, instead of using a battery for backup I'll use a 0.1F x 5V supercap. The circuit (the PIC connected to the RTC) is working at 5V, the RTC has an voltage range of 2~5V. How should I connect properly the SUPERCAP to the system in order to maintain the time in the RTC?? Best regards, Mauricio -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist