Realtime clock module based on the NXP PCF8563T
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Realtime clock module based on the NXP PCF8563T a programmable, I2C communicating up to 400KHz / 400Kb/S, high precision real time clock chipset. It offers multiple functions such as external programmable clock output, alarm, timer, it features and external quartz and a backup battery. More steady and precise than DS1302 or DS1307