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WM8311 Datasheet(PDF) 138 Page - Wolfson Microelectronics plc

Part # WM8311
Description  Processor Power Management Subsystem
PDF  302 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8311 Datasheet(HTML) 138 Page - Wolfson Microelectronics plc

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WM8311
Pre-Production
w
PP, May 2012, Rev 3.1
138
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R16416
(4020h)
RTC Write
Counter
15:0
RTC_WR_CNT
0000h
RTC Write Counter.
This random number is updated on
every write to the RTC_TIME
registers.
R16417
(4021h)
RTC Time 1
15:0
RTC_TIME
[31:16]
0000h
RTC Seconds counter (MSW)
RTC_TIME increments by 1 every
second. This is the 16 MSBs.
R16418
(4022h)
RTC Time 2
15:0
RTC_TIME [15:0]
0000h
RTC Seconds counter (LSW)
RTC_TIME increments by 1 every
second. This is the 16 LSBs.
R16419
(4023h)
RTC Alarm 1
15:0
RTC_ALM [31:16]
0000h
RTC Alarm time (MSW)
16 MSBs of RTC_ALM
R16420
(4024h)
RTC Alarm 2
15:0
RTC_ALM [15:0]
0000h
RTC Alarm time (LSW)
16 LSBs of RTC_ALM
R16421
(4025h)
RTC Control
15
RTC_VALID
0
RTC Valid status
0 = RTC_TIME has not been set
since Power On Reset
1 = RTC_TIME has been written to
since Power On Reset
14
RTC_SYNC_BUS
Y
0
RTC Busy status
0 = Normal
1 = Busy
The RTC registers should not be
written to when RTC_SYNC_BUSY =
1.
10
RTC_ALM_ENA
0
RTC Alarm Enable
0 = Disabled
1 = Enabled
R16422
(4026h)
RTC Trim
9:0
RTC_TRIM
000h
RTC frequency trim. Value is a 10bit
fixed point <4,6> 2’s complement
number. MSB Scaling = -8Hz.
The register indicates the error (in
Hz) with respect to the ideal
32768Hz) of the input crystal
frequency.
Protected by user key
Table 74 Real Time Clock (RTC) Control



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