PT7C4307 module equivalent, real-time clock module.
* Using external 32.768kHz quartz crystal
* Supports I2C-Bus's high speed mode (400 kHz)
* Includes time (Hour/Minute/Second) and calendar
(Year/Month/Date/Da.
The PT7C4307 serial real-time clock is a low-power clock/calendar with a programmable square-wave output and 56 bytes of nonvolatile RAM. Address and data are transferred serially via a 2-wire, bidirectional bus. The clock/calendar provides seconds, .
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