PCF8563 pdf datasheet

The PCF8563 is a CMOS real-TIme clock/calendar opTImized for low power consumpTIon.

A programmable clock output, interrupt output and voltage-low detector are also provided.

All addresses and data are transferred serially via a two-line bidirecTIonal I

2C-bus.

Maximum bus speed is 400 kbit/s. The built-in word address register is incremented

automatically after each written or read data byte.