PCF8563

• VCC is 3.3 / 5V voltage polarity, and it can work if the voltage is lower, but it is not recommended to use AC voltage.
• GND is connected to the GND of the power supply (usually VCC, GND is obtained from the development motherboard).
• SDA connects according to the definition of the program (after opening the program, there are instructions on the program).
• SCL wiring method is the same as SDA.
• CLKOUT is the critical clock frequency output terminal, generally not used.
• INT is an interrupt output, generally not used.