RTC Board PCF8563 Real Time Clock Module I2C Interface 3.3V

From the shop's description

A, PCF8563 clock chip PCF8563 is a PHILIPS company launched an industrial I2C bus interface with a very low power consumption of multi-functional clock / calendar chip. PCF8563 a variety of alarm function, timer function, clock output function and interrupt output function to complete a variety of complex timing services, and even for the microcontroller to provide watchdog function. It is a cost-effective clock chip, which has been widely used in the field of electric meters, water meters, gas meters, telephones, fax machines, portable instruments and battery powered instruments and meters. Main performance index of PCF8563: You can use the standby battery Wide voltage range of 1.0~5.5V. This ultra low power consumption: the typical value is 0.25uA It through the I2C bus serial input / output This programmable clock output frequency: 32.768KHz, 1024Hz, 32Hz, 1Hz. * four alarm and timer function It includes a reset circuit, oscillator capacitor and power failure detection circuit Open drain interrupt output. 400KHZ read and write speed Two, module interface description Left battery mounting interface Pay attention to the installation direction, according to the direction of the image installation Right INT interrupt output (generally not used) COT clock output (generally not used) SCL IIC clock interface MCU IO port SDA IIC digital interface MCU IO port The GND module of extraterrestrial grounding VCC power supply interface 3.3v-5v