Sony CXD5602 User Manual page 205

EXTALM_SEL Description of Functions
1 is output as an External Output Alarm (RTC0_ExtAlm). (When EXTALM_POL indicates "1")
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bit[4] : EXTALM_POL (External Alarm Output Select Signal)
This register sets signal logic (positive logic or negative logic) of External Output Alarm.
EXTALM_POL Description of Functions
0 outputs an External Output Alarm (RTC0_ExtAlm) signal in positive logic
1 outputs an External Output Alarm (RTC0_ExtAlm) signal in negative logic
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bit[9:8] : SYNC_SEL [1:0] (External Alarm Output Select Signal)
This register selects one Alarm used as a trigger of Time Synchronization.
EXTALM_SEL Description of Functions
0 RTC0_ExtAlm is used as a trigger of Time Synchronization.
1 RTC1_ExtAlm is used as a trigger of Time Synchronization.
2 When IOCSYS_IOMD0.PMIC_INT indicates 2, this alarm is used. For details, refer to Chapter
3.1.4.3.2.
3 When IOCSYS_IOMD0.PMIC_INT indicates 3, this alarm is used. For details, refer to Chapter
3.1.4.3.3.
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bit[12] : CLKNEGEDGE_EN (Inverted Clock Setting)
By using this register, External Output Alarm and Time Synchronization Trigger Signal are set whether
to synchronize at the falling edge of the clock.
EXTALM_POL Description of Functions
0 External Output Alarm and Time Synchronization are performed at the rising edge of the clock.
External Output Alarm and Time Synchronization Trigger Signal synchronize to usual clock.
1 External Output Alarm and Time Synchronization are performed at the falling edge of the clock.
External Output Alarm and Time Synchronization Trigger Signal synchronize to inverted clock
(falling edge of the usual clock).
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CXD5602 User Manual