Microchip Technology DM183021 Data Sheet
2010 Microchip Technology Inc.
DS39616D-page 271
PIC18F2331/2431/4331/4431
REGISTER 23-9:
CONFIG6L: CONFIGURATION REGISTER 6 LOW (BYTE ADDRESS 30000Ah)
U-0
U-0
U-0
U-0
R/P-1
R/P-1
R/P-1
R/P-1
—
—
—
—
WRT3
(1,2)
WRT2
(1,2)
WRT1
(2)
WRT0
(2)
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed
U = Unchanged from programmed state
bit 7-4
Unimplemented:
Read as ‘0’
bit 3
WRT3:
Write Protection bit
(1,2)
1
= Block 3 is not write-protected
0
= Block 3 is write-protected
bit 2
WRT2:
Write Protection bit
(1,2)
1
= Block 2 is not write-protected
0
= Block 2 is write-protected
bit 1
WRT1:
Write Protection bit
(2)
1
= Block 1 is not write-protected
0
= Block 1 is write-protected
bit 0
WRT0:
Write Protection bit
(2)
1
= Block 0 is not write-protected
0
= Block 0 is write-protected
Note 1:
Unimplemented in PIC18F2331/4331 devices; maintain this bit set.
2:
for block boundary addresses.
REGISTER 23-10: CONFIG6H: CONFIGURATION REGISTER 6 HIGH (BYTE ADDRESS 30000Bh)
R/P-1
R/P-1
R-1
U-0
U-0
U-0
U-0
U-0
WRTD
(2)
WRTB
(2)
WRTC
(1,2)
—
—
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘0’
-n = Value when device is unprogrammed
U = Unchanged from programmed state
bit 7
WRTD:
Data EEPROM Write Protection bit
(2)
1
= Data EEPROM is not write-protected
0
= Data EEPROM is write-protected
bit 6
WRTB:
Boot Block Write Protection bit
(2)
1
= Boot block is not write-protected
0
= Boot block is write-protected
bit 5
WRTC:
Configuration Register Write Protection bit
(1,2)
1
= Configuration registers are not write-protected
0
= Configuration registers are write-protected
bit 4-0
Unimplemented:
Read as ‘0’
Note 1:
This bit is read-only in normal execution mode; it can be written only in Program mode.
2:
for block boundary addresses.