GigaDevice Semiconductor GD32F3x0 - Page 236

GD32F3x0 User Manual
236
1: Enable calibration output
22:21
OS[1:0]
Output selection
This bit is used for selecting flag source to output
0x0: Disable output RTC_ALARM
0x1: Enable alarm0 flag output
0x2: Reserved
0x3: Reserved
20
OPOL
Output polarity
This bit is used to invert output RTC_ALARM
0: Disable invert output RTC_ALARM
1: Enable invert output RTC_ALARM
19
COS
Calibration output selection
Valid only when COEN = 1 and prescalers are at default values
0: Calibration output is 512 Hz
1: Calibration output is 1Hz
18
DSM
Daylight saving mark
This bit is flexible used by software. Often can be used to recording the daylight
saving hour adjustment.
17
S1H
Subtract 1 hour (winter time change)
One hour will be subtracted from current time if it is not 0
0: No effect
1: 1 hour will be subtracted at next second change time.
16
A1H
Add 1 hour (summer time change)
One hour will be added from current time
0: No effect
1: 1 hour will be added at next second change time
15
TSIE
Time-stamp interrupt enable
0: Disable time-stamp interrupt
1: Enable time-stamp interrupt
14:13
Reserved
Must be kept at reset value.
12
ALRM0IE
RTC alarm-0 interrupt enable
0: Disable alarm interrupt
1: Enable alarm interrupt
11
TSEN
Time-stamp function enable
0: Disable time-stamp function
1: Enable time-stamp function
10:9
Reserved
Must be kept at reset value.