Introduction - If you have any usage issues, please Google them yourself
The PCF8563 is a CMOS real-meclock/calendar optimized for low powerconsumption. A programmable clock output, interrupt output and voltage-low detectorare also provided. All address and data are transferred serially via a two-linebidirectional I C-bus. Maximum bus speed is 400 kbits/s. The built-in word address
register is incremented automatically after each written or read data byte.