MSM6782-01 Datasheet, PDF (12/17 Pages) OKI electronic componets – REAL TIME CLOCK

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MSM6782-01
C_F REGISTER (Control F Register)
• TEST
The TEST bit is used for testing by OKI and should be set to “0”.
This bit can be cleared to “0” by setting the CE pin to “L” level.
• 24/12
This bit is used to switch between 24-hour system and 12-hour system.
24/12 = “1” : 24-hour system without PM/AM
24/12 = “0” : 12-hour system with PM/AM
When the 24/12 bit is overwritten, data in the H₁ ~ W registers may become undefined.
Therefore, it is required to newly set those registers again.
• STOP
“1” of this bit stops clocking and “0” restarts clocking.
• REST
“1” of this bit clears under-second-time to zero and at the same time stops clocking. “0” of
this bit restarts clocking.
Take care not to set the TEST bit to “1” when writing “0” into the REST bit.
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