Chapter 12
Real Time Clock (RTC)
XII - 12 Control Registers
Hours Setting Register (RTCHD: 0x03EE2)
Day of Week Setting Register (RTCWD: 0x03EE3)
bp 76543210
Bit name - HD6 HD5-0
At reset00000000
Access R R/W R/W R/W R/W R/W R/W R/W
bp Bit name Description
7 - Always read as 0.
6HD6
"AM/PM" setting
0: AM
1: PM
* In 24-hour clock mode, bit setting of the HD6 is ignored.
5 to 0 HD5 to 0
"Hour" setting
<24-hour clock mode>
Set a value within the range of "00" to "23" using the BCD format.
The value is incremented by one from "00" to "23" per hour.
<In 12-hour clock>
Set a value within the range of "00" to "11" using the BCD format.
The value is incremented by one from "00" to "11" per hour.
* The value which doesn’t exist must not be set.
bp 76543210
Bit name----- WD2-0
At reset00000000
Access R R R R R R/W R/W R/W
bp Bit name Description
7 to 3 - Always read as 0.
2 to 0 WD2 to 0
"Day of the week" setting
000: Sunday
001: Monday
010: Tuesday
011: Wednesday
100: Thursday
101: Friday
110: Saturday
111: Setting Prohibited
* The value is incremented by one from "000" to "110" per day.
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