Production Data
WM8321
ADDRESS
R16416
BIT
LABEL
DEFAULT
DESCRIPTION
RTC Write Counter.
RTC_WR_CNT
15:0
0000h
(4020h)
This random number is updated on
every write to the RTC_TIME
registers.
RTC Write
Counter
R16417
(4021h)
RTC_TIME
[31:16]
RTC Seconds counter (MSW)
15:0
15:0
15:0
15:0
15
0000h
0000h
0000h
0000h
0
RTC_TIME increments by 1 every
second. This is the 16 MSBs.
RTC Time 1
R16418
(4022h)
RTC_TIME [15:0]
RTC_ALM [31:16]
RTC_ALM [15:0]
RTC_VALID
RTC Seconds counter (LSW)
RTC_TIME increments by 1 every
second. This is the 16 LSBs.
RTC Time 2
R16419
(4023h)
RTC Alarm time (MSW)
16 MSBs of RTC_ALM
RTC Alarm 1
R16420
(4024h)
RTC Alarm time (LSW)
16 LSBs of RTC_ALM
RTC Alarm 2
R16421
(4025h)
RTC Valid status
0 = RTC_TIME has not been set
since Power On Reset
RTC Control
1 = RTC_TIME has been written to
since Power On Reset
RTC_SYNC_BUS
Y
RTC Busy status
0 = Normal
14
0
1 = Busy
The RTC registers should not be
written to when RTC_SYNC_BUSY =
1.
RTC_ALM_ENA
RTC_TRIM
RTC Alarm Enable
0 = Disabled
10
0
1 = Enabled
R16422
(4026h)
RTC frequency trim. Value is a 10bit
fixed point <4,6> 2’s complement
number. MSB Scaling = -8Hz.
9:0
000h
RTC Trim
The register indicates the error (in
Hz) with respect to the ideal
32768Hz) of the input crystal
frequency.
Protected by user key
Table 49 Real Time Clock (RTC) Control
PD, February 2012, Rev 4.0
105
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
