PIC16F818/819
REGISTER 12-1: CONFIGURATION WORD (ADDRESS 2007h)(1)
R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
CP CCPMX DEBUG WRT1 WRT0 CPD LVP BOREN MCLRE FOSC2 PWRTEN WDTEN FOSC1 FOSC0
bit 13 bit 0
R/P-1 R/P-1
R/P-1
R/P-1
R/P-1 R/P-1
bit 13
bit 12
bit 11
CP: Flash Program Memory Code Protection bit
1= Code protection off
0= All memory locations code-protected
CCPMX: CCP1 Pin Selection bit
1= CCP1 function on RB2
0= CCP1 function on RB3
DEBUG: In-Circuit Debugger Mode bit
1= In-Circuit Debugger disabled, RB6 and RB7 are general purpose I/O pins
0= In-Circuit Debugger enabled, RB6 and RB7 are dedicated to the debugger
bit 10-9
WRT1:WRT0: Flash Program Memory Write Enable bits
For PIC16F818:
11= Write protection off
10= 000h to 01FF write-protected, 0200 to 03FF may be modified by EECON control
01= 000h to 03FF write-protected
For PIC16F819:
11= Write protection off
10= 0000h to 01FFh write-protected, 0200h to 07FFh may be modified by EECON control
01= 0000h to 03FFh write-protected, 0400h to 07FFh may be modified by EECON control
00= 0000h to 05FFh write-protected, 0600h to 07FFh may be modified by EECON control
bit 8
CPD: Data EE Memory Code Protection bit
1= Code protection off
0= Data EE memory locations code-protected
bit 7
LVP: Low-Voltage Programming Enable bit
1= RB3/PGM pin has PGM function, Low-Voltage Programming enabled
0= RB3/PGM pin has digital I/O function, HV on MCLR must be used for programming
bit 6
BOREN: Brown-out Reset Enable bit
1= BOR enabled
0= BOR disabled
bit 5
MCLRE: RA5/MCLR/VPP Pin Function Select bit
1= RA5/MCLR/VPP pin function is MCLR
0= RA5/MCLR/VPP pin function is digital I/O, MCLR internally tied to VDD
bit 3
PWRTEN: Power-up Timer Enable bit
1= PWRT disabled
0= PWRT enabled
bit 2
WDTEN: Watchdog Timer Enable bit
1= WDT enabled
0= WDT disabled
bit 4, 1-0
FOSC2:FOSC0: Oscillator Selection bits
111= EXTRC oscillator; CLKO function on RA6/OSC2/CLKO pin
110= EXTRC oscillator; port I/O function on RA6/OSC2/CLKO pin
101= INTRC oscillator; CLKO function on RA6/OSC2/CLKO pin and port I/O function on
RA7/OSC1/CLKI pin
100= INTRC oscillator; port I/O function on both RA6/OSC2/CLKO pin and RA7/OSC1/CLKI pin
011= EXTCLK; port I/O function on RA6/OSC2/CLKO pin
010= HS oscillator
001= XT oscillator
000= LP oscillator
Note 1: The erased (unprogrammed) value of the Configuration Word is 3FFFh.
Legend:
R = Readable bit
P = Programmable bit
U = Unimplemented bit, read as ‘1’
-n = Value when device is unprogrammed
u = Unchanged from programmed state
DS39598E-page 90
2004 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
