PIC18F87J90 Datasheet, PDF (160/450 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F87J90 FAMILY
REGISTER 15-5: ALRMRPT: ALARM REPEAT REGISTER
R/W-0
ARPT7
bit 7
R/W-0
ARPT6
R/W-0
ARPT5
R/W-0
ARPT4
R/W-0
ARPT3
R/W-0
ARPT2
R/W-0
ARPT1
R/W-0
ARPT0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-0
ARPT<7:0>: Alarm Repeat Counter Value bits
11111111 = Alarm will repeat 255 more times
.
.
.
00000000 = Alarm will not repeat
The counter decrements on any alarm event. The counter is prevented from rolling over from 00h to
FFh unless CHIME = 1.
15.1.2
RTCVALH AND RTCVALL
REGISTER MAPPINGS
REGISTER 15-6: RESERVED REGISTER
U-0
—
bit 7
U-0
U-0
U-0
—
—
—
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
bit 7-0
Unimplemented: Read as ‘0’
U-0
U-0
U-0
U-0
—
—
—
—
bit 0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
REGISTER 15-7: YEAR: YEAR VALUE REGISTER⁽¹⁾
R/W-x
YRTEN3
bit 7
R/W-x
YRTEN2
R/W-x
YRTEN1
R/W-x
YRTEN0
R/W-x
YRONE3
R/W-x
YRONE2
R/W-x
YRONE1
R/W-x
YRONE0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-4
bit 3-0
YRTEN<3:0>: Binary Coded Decimal Value of Year’s Tens Digit bits
Contains a value from 0 to 9.
YRONE<3:0>: Binary Coded Decimal Value of Year’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to the YEAR register is only allowed when RTCWREN = 1.
DS39933D-page 160
 2010 Microchip Technology Inc.