Microchip Technology MA240017 データシート
2008-2011 Microchip Technology Inc.
DS39927C-page 159
PIC24F16KA102 FAMILY
REGISTER 19-3:
ALCFGRPT: ALARM CONFIGURATION REGISTER
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
ALRMEN
CHIME
AMASK3
AMASK2
AMASK1
AMASK0
ALRMPTR1
ALRMPTR0
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
ARPT7
ARPT6
ARPT5
ARPT4
ARPT3
ARPT2
ARPT1
ARPT0
bit 7
bit 0
Legend:
R = Readable bit
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 ARPT<7:0> = 00h and
CHIME = 0)
0
= Alarm is disabled
bit 14
CHIME:
Chime Enable bit
1
= Chime is enabled; ARPT<7:0> bits are allowed to roll over from 00h to FFh
0
= Chime is disabled; ARPT<7:0> bits stop once they reach 00h
bit 13-10
AMASK<3:0>:
Alarm Mask Configuration bits
0000
= Every half second
0001
= Every second
0010
= Every 10 seconds
0011
= Every minute
0100
= Every 10 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 29
th
, once every 4 years)
101x
= Reserved – do not use
11xx
= Reserved – do not use
bit 9-8
ALRMPTR<1:0>:
Alarm Value Register Window Pointer bits
Points to the corresponding Alarm Value registers when reading the ALRMVALH and ALRMVALL registers.
The ALRMPTR<1:0> value decrements on every read or write of ALRMVALH until it reaches ‘00’.
ALRMVAL<15:8>:
00
The ALRMPTR<1:0> value decrements on every read or write of ALRMVALH until it reaches ‘00’.
ALRMVAL<15:8>:
00
= ALRMMIN
01
= ALRMWD
10
= ALRMMNTH
11
= Unimplemented
ALRMVAL<7:0>:
00
00
= ALRMSEC
01
= ALRMHR
10
= ALRMDAY
11
= Unimplemented
bit 7-0
ARPT<7:0>:
Alarm Repeat Counter Value bits
11111111
= Alarm will repeat 255 more times
.
.
.
00000000
.
.
00000000
= Alarm will not repeat
The counter decrements on any alarm event; it is prevented from rolling over from 00h to FFh unless
CHIME = 1.
CHIME = 1.