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DVR21 数据表(PDF) 255 Page - Microchip Technology

部件名 DVR21
功能描述  16-Bit General Purpose Microcontrollers with 256-Kbyte Flash and 16-Kbyte RAM in Low Pin Count Packages
PDF  416 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

DVR21 数据表(HTML) 255 Page - Microchip Technology

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 2016-2018 Microchip Technology Inc.
DS30010118D-page 255
PIC24FJ256GA705 FAMILY
REGISTER 21-2:
RTCCON1H: RTCC CONTROL REGISTER 1 (HIGH)
R/W-0
R/W-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
ALRMEN
CHIME
—
—
AMASK3
AMASK2
AMASK1
AMASK0
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ALMRPT7
ALMRPT6
ALMRPT5
ALMRPT4
ALMRPT3
ALMRPT2
ALMRPT1
ALMRPT0
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
ALRMEN: Alarm Enable bit
1 = Alarm is enabled (cleared automatically after an alarm event whenever ALMRPT<7:0> = 00h and
CHIME = 0)
0 = Alarm is disabled
bit 14
CHIME: Chime Enable bit
1 = Chime is enabled; ALMRPT<7:0> bits roll over from 00h to FFh
0 = Chime is disabled; ALMRPT<7:0> bits stop once they reach 00h
bit 13-12
Unimplemented: Read as ‘0’
bit 11-8
AMASK<3:0>: Alarm Mask Configuration bits
0000 = Every half second
0000 = Every second
0010 = Every ten seconds
0011 = Every minute
0100 = Every ten minutes
0101 = Every hour
0110 = Once a day
0111 = Once a week
1000 = Once a month
1001 = Once a year (except when configured for February 29th, once every four years)
101x = Reserved – do not use
11xx = Reserved – do not use
bit 7-0
ALMRPT<7:0>: Alarm Repeat Counter Value bits
11111111 = Alarm will repeat 255 more times
•
•
•
00000000 = Alarm will repeat 0 more times
The counter decrements on any alarm event. The counter is prevented from rolling over from ‘00’ to ‘FF’
unless CHIME = 1.



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