Microchip Technology MA180025 データシート
2010 Microchip Technology Inc.
DS39933D-page 329
PIC18F87J90 FAMILY
REGISTER 25-4:
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
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.
executed as a NOP if it is accidentally executed.
REGISTER 25-5:
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
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.
executed as a NOP if it is accidentally executed.