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14 REAL-TIME CLOCK (RTC)
Note: Be sure to avoid writing to this register while the RTCCTL.RTCST bit = 1.
Bits 15–8 Reserved
Bit 7
aMPM
This bit is used to set and read A.M. or P.M. data in 12H mode (RTCCTL.RTC24H bit = 1).
1 (R/W): P.M.
0 (R/W): A.M.
In 24H mode (RTCCTL.RTC24H bit = 0), this bit is fixed at 0. In this case, do not write 1 to the
RTCHUR.AMPM bit.
Note: The RTCHUR.AMPM bit will be fixed at 0 immediately after the RTCCTL.RTC24H bit is
changed from 12-hour mode to 24-hour mode.
Bit 6
Reserved
Bits 5–0
RTChuR[5:0]
These bits are used to read and write data from/to the hour counter.
For the configuration of the hour counter, see "RTC Counters." For the counter read and write
procedures, see "Operations."
14-8
Seiko epson Corporation
S1C17F13 TeChniCal Manual
(Rev. 1.0)
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