Datasheet

 2010 Microchip Technology Inc. Preliminary DS39979A-page 323
PIC18F87J72 FAMILY
REGISTER 26-4: CONFIG2H: CONFIGURATION REGISTER 2 HIGH (BYTE ADDRESS 300003h)
U-0 U-0 U-0 U-0 R/WO-1 R/WO-1 R/WO-1 R/WO-1
—
(1)
—
(1)
—
(1)
—
(1)
WDTPS3 WDTPS2 WDTPS1 WDTPS0
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed ‘1’ = Bit is set ‘0’ = Bit is cleared
bit 7-4 Unimplemented: Read as ‘0’
bit 3-0 WDTPS<3:0>: Watchdog Timer Postscale Select bits
1111 = 1:32,768
1110 = 1:16,384
1101 = 1:8,192
1100 = 1:4,096
1011 = 1:2,048
1010 = 1:1,024
1001 = 1:512
1000 = 1:256
0111 = 1:128
0110 = 1:64
0101 = 1:32
0100 = 1:16
0011 = 1:8
0010 = 1:4
0001 = 1:2
0000 = 1:1
Note 1: The value of these bits in program memory should always be ‘1’. This ensures that the location is
executed as a NOP if it is accidentally executed.
REGISTER 26-5: CONFIG3L: CONFIGURATION REGISTER 3 LOW (BYTE ADDRESS 300004h)
U-0 U-0 U-0 U-0 U-0 U-0 R/WO-1 U-0
—
(1)
—
(1)
—
(1)
—
(1)
— —RTCOSC—
bit 7 bit 0
Legend:
R = Readable bit WO = Write-Once bit U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed ‘1’ = Bit is set ‘0’ = Bit is cleared
bit 7-2 Unimplemented: Read as ‘0’
bit 1 RTCOSC: RTCC Reference Clock Select bit
1 = RTCC uses T1OSC/T1CKI as the reference clock
0 = RTCC uses INTRC as the reference clock
bit 0 Unimplemented: Read as ‘0’
Note 1: The value of these bits in program memory should always be ‘1’. This ensures that the location is
executed as a NOP if it is accidentally executed.