Datasheet
PIC18F87K22 FAMILY
DS39960D-page 230 2009-2011 Microchip Technology Inc.
REGISTER 18-2: RTCCAL: RTCC CALIBRATION 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
CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0
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 7-0 CAL<7:0>: RTC Drift Calibration bits
01111111 = Maximum positive adjustment. Adds 508 RTC clock pulses every minute.
.
.
.
00000001 = Minimum positive adjustment. Adds four RTC clock pulses every minute.
00000000 = No adjustment
11111111 = Minimum negative adjustment. Subtracts four RTC clock pulses every minute.
.
.
.
10000000 = Maximum negative adjustment. Subtracts 512 RTC clock pulses every minute.
REGISTER 18-3: PADCFG1: PAD CONFIGURATION REGISTER
R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0 U-0
RDPU REPU RJPU
(2)
— — RTSECSEL1
(1)
RTSECSEL0
(1)
—
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 7 RDPU: PORTD Pull-up Enable bit
1 = PORTD pull-up resistors are enabled by individual port latch values
0 = All PORTD pull-up resistors are disabled
bit 6 REPU: PORTE Pull-up Enable bit
1 = PORTE pull-up resistors are enabled by individual port latch values
0 = All PORTE pull-up resistors are disabled
bit 5 RJPU: PORTJ Pull-up Enable bit
(
2
)
1 = PORTJ pull-up resistors are enabled by individual port latch values
0 = All PORTJ pull-up resistors are disabled
bit 2-1 RTSECSEL<1:0>: RTCC Seconds Clock Output Select bits
(1)
11 = Reserved; do not use
10 = RTCC source clock is selected for the RTCC pin (pin can be LF-INTOSC or SOSC, depending on
the RTCOSC (CONFIG3L<1>) bit setting)
01 = RTCC seconds clock is selected for the RTCC pin
00 = RTCC alarm pulse is selected for the RTCC pin
bit 0 Unimplemented: Read as ‘0’
Note 1: To enable the actual RTCC output, the RTCOE (RTCCFG<2>) bit must be set.
2: Unimplemented on 64-pin devices (PIC18F6XK22), read as ‘0’.