WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 230

• Manufacturer Part Number: WM8351CGEB/RV
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8351
Register 15h Alarm Hours/Day
Register 16h Alarm Date/Month
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REGISTER
REGISTER
REGISTER
ADDRESS
ADDRESS
ADDRESS
Date/Month
Hours/Day
R21 (15h)
RTC Time
R22 (16h)
R23 (17h)
Control
Alarm
Alarm
BIT
BIT
BIT
11:8
12:8
4:0
5:0
15
14
11
10
5
9
8
RTC_ALMHRS[4:0]
RTC_ALMDATE[5:0]
RTC_ALMDAY[3:0]
RTC_ALMMTH[4:0]
RTC_ALMSET
RTC_ALMSTS
RTC_ALMHPM
RTC_12HR
RTC_BCD
RTC_SET
RTC_STS
LABEL
LABEL
LABEL
DEFAULT
DEFAULT
DEFAULT
0_0000
0
0
0
0
1
1
00_0000
0000
0_0000
0
RTC Coding (applies to all time registers)
0 = Binary
1 = BCD
RTC 12/24 hours mode
1 = 12 hours (MSB of RTC_HRS indicates AM/PM)
0 = 24 hours (MSB of RTC_HRS is 0)
Stops RTC seconds counter (instruction only)
0 = normal operation
1 = stop counter
Status of RTC seconds counter
0 = normal operation
1 = counter stopped
Stops alarms (instruction only)
0 = normal operation
1 = stop alarms
It is recommended to stop alarms when setting the
RTC alarm. This avoids false alarms.
Actual status of ALARM circuitry
0 = normal operation
1 = alarms stopped
Day alarm register, with range 1-7, 1 = Sunday.
All 1's sets to 'don't care' state.
Note, during programming it is best to disable the
Alarm Enable request bit to avoid false alarms.
Alarm hours AM/PM flag
0 = AM
1 = PM
Only applicable in 12 hour mode. In 24 hour mode
set to 1 if RTC_ALMHRS is set to all 1’s ‘don’t care’
or 0 otherwise.
Hours alarm register with range 0-23 in 24 hours
mode and 1-12 in 12 hour. In 12 hour mode bit 5 is
used as PM/not-AM flag. All 1's sets to 'don't care'
state.
Note, during programming it is best to disable the
Alarm Enable request bit to avoid false alarms.
Month alarm register with range 1-12. All 1's sets
to 'don't care' state.
Note, during programming it is best to disable the
Alarm Enable request bit to avoid false alarms.
Date alarm register with range 1-31. All 1's sets to
'don't care' state.
Note, during programming it is best to disable the
Alarm Enable request bit to avoid false alarms.
DESCRIPTION
DESCRIPTION
DESCRIPTION
PD, April 2012, Rev 4.5
REFER TO
REFER TO
REFER TO
Production Data
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