Chapter 12
Real Time Clock (RTC)
XII - 8 Control Registers
Alarm 1 Hours Setting Register (AL1IRQH: 0x03ED9)
Alarm 1 Day Setting Register (AL1IRQD: 0x03EDA)
bp76543210
Bit name - AL1IRQH6 AL1IRQH5-0
At reset00000000
Access R R/WR/WR/WR/WR/WR/WR/W
bp Bit name Description
7 - Always read as 0.
6 AL1IRQH6
Alarm 1 "AM/PM" setting
0: AM
1: PM
* This bit must be set in 12-hour clock mode.
When 24-hour clock mode, this bit must be set to "0".
5 to 0 AL1IRQH5-0
Alarm 1 "Hour" setting
<24-hour clock mode>
Set a value within the range of "00" to "23" using the BCD format.
<In 12-hour clock>
Set a value within the range of "00" to "11" using the BCD format.
* The value which doesn’t exist must not be set.
bp76543210
Bit name - - AL1IRQD5-0
At reset00000000
Access R R R/WR/WR/WR/WR/WR/W
bp Bit name Description
7 to 6 - Always read as 0.
5 to 0 AL1IRQD5-0
Alarm 1 "Day" setting
Set a value within the range of "01" to "31" using the BCD format.
* The value which doesn’t exist must not be set.
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