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D301 Datasheet(PDF) 255 Page - Microchip Technology |
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D301 Datasheet(HTML) 255 Page - Microchip Technology |
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255 / 416 page  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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