Sony CXD5602 User Manual page 180

3.6.5.2.4 WrIntCtrl(0x18)
31 30 29 28
Reserved
-
15 14 13 12
Reserved
-

bit[0] : Busy (Request for waiting for External Alarm Flag)
When you write "1" on Busy, the internal RTC comes into the status of waiting for External Alarm Flag.
When the internal RTC detects the edge of the External Alarm Flag during this waiting status,
WrIntPostCnt value and WrIntPreCnt value are reflected on PostCounter and PreCounter separately, and
the internal RTC is synchronized with the external RTC.
You can cancel Request for waiting for External Alarm Flag by writing
Busy
0
1

bit[8] : Edge (Positive/Negative Edge Detection of the External Alarm Flag)
Edge
0
1
When WrReg(Post/Pre)Cnt value is reflected to (Post/Pre)Counter and Write Request
becomes possible to be issued again, this register is cleared to "0" automatically.
27 26 25 24
11 10 9 8
Edge
RW
Description of Functions
Writing 0: You cannot write "0".
Writing 1: makes internal RTC come into the status of waiting for the External Alarm
Flag. When the internal RTC detects the External Alarm Flag during this waiting status
and WrInt(Post/Pre)Cnt value is reflected on (Post/Pre)Counter, this register is
cleared to "0" automatically.
Description of Functions
Writing 0: detects rising edges of the External Alarm Flag and synchronizes the
internal RTC with the external RTC.
Writing 1: detects falling edges of the External Alarm Flag and synchronizes the
internal RTC with the external RTC.
－180/1010－
23 22 21 20
7 6 5 4
Reserved
-
on WrIntClr register.
"1"
CXD5602 User Manual
19 18 17 16
3 2 1 0
Busy
RW