wm8352 Wolfson Microelectronics plc, wm8352 Datasheet - Page 231

• Manufacturer Part Number: wm8352
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

Production Data
Register 17h RTC Time Control
w
REGISTER
ADDRESS
RTC Time
R23 (17h)
Control
BIT
6:4
3:0
15
14
11
10
9
8
RTC_PINT[2:0]
RTC_DSW[3:0]
RTC_ALMSET
RTC_ALMSTS
RTC_12HR
RTC_BCD
RTC_SET
RTC_STS
LABEL
DEFAULT
0000
010
0
0
0
0
1
1
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
Selects frequency of periodic interrupt output pulse
(32kHz period duration) as shown below. When set
time status is high, the periodic output is disabled.
000 = disabled
001 = 1 sec
010 = 1 min
011 = 1 hour
100 = 1 day
101 = 1 month
11x = disabled
Divided Square wave select.
0000 = disabled
0001 = 1Hz
0010 = 2Hz
…
1011 = 1024Hz
1100 = 2048Hz
1101 = 4096Hz
1110 = 8192Hz
1111 = 16384Hz
Note: due to trim settings for crystal intolerances a
single square wave period during seconds rollover
may be decrease its on time period or increase its off
time period by up to 8 32kHz periods.
DESCRIPTION
PD, June 2009, Rev 4.1
REFER TO
WM8352
231