PIC18F258 Datasheet, PDF (267/384 Pages) Microchip Technology – High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN

PIC18FXX8
REGISTER 24-7: CONFIGURATION REGISTER 6 LOW (CONFIG6L: 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⁾ WRT2⁽¹⁾ WRT1
WRT0
bit 7
bit 0
bit 7-4
bit 3
bit 2
bit 1
bit 0
Unimplemented: Read as ‘0’
WRT3: Write Protection bit⁽¹⁾
1 = Block 3 (006000-007FFFh) not write protected
0 = Block 3 (006000-007FFFh) write protected
WRT2: Write Protection bit⁽¹⁾
1 = Block 2 (004000-005FFFh) not write protected
0 = Block 2 (004000-005FFFh) write protected
WRT1: Write Protection bit
1 = Block 1 (002000-003FFFh) not write protected
0 = Block 1 (002000-003FFFh) write protected
WRT0: Write Protection bit
1 = Block 0 (000200-001FFFh) not write protected
0 = Block 0 (000200-001FFFh) write protected
Note 1: Unimplemented in PIC18FX48 devices; maintain this bit set.
Legend:
R = Readable bit
P = Programmable bit
- n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
REGISTER 24-8: CONFIGURATION REGISTER 6 HIGH (CONFIG6H: BYTE ADDRESS 30000Bh)
R/P-1
R/P-1
R-1
U-0
U-0
U-0
U-0
U-0
WRTD WRTB WRTC
—
—
—
—
—
bit 7
bit 0
bit 7
WRTD: Data EEPROM Write Protection bit
1 = Data EEPROM not write protected
0 = Data EEPROM write protected
bit 6
WRTB: Boot Block Write Protection bit
1 = Boot Block (000000-0001FFh) not write protected
0 = Boot Block (000000-0001FFh) write protected
bit 5
WRTC: Configuration Register Write Protection bit
1 = Configuration registers (300000-3000FFh) not write protected
0 = Configuration registers (300000-3000FFh) write protected
Note: This bit is read only, and cannot be changed in User mode.
bit 4-0 Unimplemented: Read as ‘0’
Legend:
R = Readable bit
P =Programmable bit
- n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
 2002 Microchip Technology Inc.
Preliminary
DS41159B-page 265