M41T93_08 Datasheet, PDF (17/51 Pages) STMicroelectronics – Serial SPI bus RTC with battery switchover

M41T93
Clock operation
completion of a WRITE to any clock address (00h to 07h). The system-to-user transfer of
clock data will be halted whenever the address being read is a clock address (00h to 07h).
The update will resume either due to a stop condition or when the pointer increments to a
non-clock address. Clock and alarm registers store data in BCD format. Calibration, timer,
watchdog, and square wave bits are written in a binary format.
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