Nations N32G45 Series, User Manual

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420 / 838
Nations Technologies Inc.
Tel
：
+86-755-86309900
Email
：
info@nationstech.com
Address: Nations Tower, #109 Baoshen Road, Hi-tech Park North.
Nanshan District, Shenzhen, 518057, P.R.China
Bit field Name Description
* CP) – CM[8:0]).
0: No add pulse.
1: One RTCCLK pulse is inserted every 2
11
pulses.
14 CW8 Select an 8-second calibration cycle period
0: Not effect.
1: Select an 8-second calibration period.
When CW8 is set to ‘1’, the 8-second calibration cycle period is selected.
Note: when CW8 = 1, CM[1:0] will always be' 00'
13 CW16 To select a 16-second calibration cycle period
0: Not effect.
1: Select a calibration period of 16 seconds. If CW8 = 1, this bit cannot be set to 1.
Note: when CW16 = 1, CM[0] will always be '0'
12:9 Reserved Reserved, the reset value must be maintained
8:0 CM[8:0] Negative calibration bits
The number of mask pulse out of 2
20
RTCCLK pulses. This effectively decreases the
frequency of the calendar with a resolution of 0.9537 ppm.
14.3.17 RTC Alarm A sub-second register (RTC_ ALRMASS)
Address offset: 0x44
Reset value: 0x0000 0000
Bit field Name Description
31:28 Reserved Reserved, the reset value must be maintained
27:24 MASKSSB[3:0] Mask the most significant bit from this bits.
0x0: No comparison on sub seconds for Alarm. The alarm is set when the seconds
unit is incremented (assuming that the rest of the fields match).
0x1: Only SSV[0] is compared and other bits are not compared.
0x2: Only SSV[1:0] are compared and other bits are not compared.
0x3: Only SSV[2:0] are compared and other bits are not compared.
...
0xC: Only SSV[11:0] are compared and other bits are not compared.
0xD: Only SSV[12:0] are compared and other bits are not compared.
0xE: Only SSV[13:0] are compared and other bits are not compared.
0xF: SSV[14:0] are compared
Synchronization counter RTC_SUBS.SS[15] bit is never compared.