PIC18F87J90 Datasheet, PDF (158/450 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F87J90 FAMILY
REGISTER 15-2: RTCCAL: RTCC CALIBRATION REGISTER
R/W-0
CAL7
bit 7
R/W-0
CAL6
R/W-0
CAL5
R/W-0
CAL4
R/W-0
CAL3
R/W-0
CAL2
R/W-0
CAL1
R/W-0
CAL0
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
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 15-3: PADCFG1: PAD CONFIGURATION REGISTER
U-0
U-0
U-0
U-0
U-0
R/W-0
R/W-0
—
—
—
—
—
RTSECSEL1⁽¹⁾ RTSECSEL0⁽¹⁾
bit 7
U-0
—
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 7-3
bit 2-1
bit 0
Unimplemented: Read as ‘0’
RTSECSEL<1:0>: RTCC Seconds Clock Output Select bit⁽¹⁾
11 = Reserved; do not use
10 = RTCC source clock is selected for the RTCC pin (pin can be INTOSC or Timer1 oscillator, depending
on the RTCOSC (CONFIG3L<1>) bit setting)⁽²⁾
01 = RTCC seconds clock is selected for the RTCC pin
00 = RTCC alarm pulse is selected for the RTCC pin
Unimplemented: Read as ‘0’
Note 1: To enable the actual RTCC output, the RTCOE (RTCCFG<2>) bit must be set.
2: If the Timer1 oscillator is the clock source for RTCC, the T1OSCEN bit should be set (T1CON<3> = 1).
DS39933D-page 158
 2010 Microchip Technology Inc.