The PCF8563 program found online is basically useless This program is based on 51 MCU, simulates the I2C interface, and has been successfully debugged, which can be turned into a perpetual calendar

PCF8563原程序
.............\DIS.H
.............\IIC.h
.............\PCF8563
.............\PCF8563.c
.............\PCF8563.hex

.............\PCF8563.lnp
.............\PCF8563.LST
.............\PCF8563.M51
.............\PCF8563.OBJ
.............\PCF8563.Opt
.............\PCF8563.plg
.............\PCF8563.Uv2
.............\PCF8563_Opt.Bak
.............\STARTUP.A51
.............\STARTUP.LST
.............\STARTUP.OBJ
.............\zf.h
.............\说明.txt

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