Features Configuration Bits RAM map SFR map

PIC16F877
CONFIG (address:0x2007, mask:0x3BFF, default:0x3BFF)
FOSC -- Oscillator Selection bits (bitmask:0x0003)
FOSC = LP | 0x3FFC | LP oscillator.
FOSC = XT | 0x3FFD | XT oscillator.
FOSC = HS | 0x3FFE | HS oscillator.
FOSC = EXTRC | 0x3FFF | RC oscillator.
WDTE -- Watchdog Timer Enable bit (bitmask:0x0004)
WDTE = OFF | 0x3FFB | WDT disabled.
WDTE = ON | 0x3FFF | WDT enabled.
PWRTE -- Power-up Timer Enable bit (bitmask:0x0008)
PWRTE = ON | 0x3FF7 | PWRT enabled.
PWRTE = OFF | 0x3FFF | PWRT disabled.
BOREN -- Brown-out Reset Enable bit (bitmask:0x0040)
BOREN = OFF | 0x3FBF | BOR disabled.
BOREN = ON | 0x3FFF | BOR enabled.
LVP -- Low Voltage In-Circuit Serial Programming Enable bit (bitmask:0x0080)
LVP = OFF | 0x3F7F | RB3 is digital I/O, HV on MCLR must be used for programming.
LVP = ON | 0x3FFF | RB3/PGM pin has PGM function; low-voltage programming enabled.
CPD -- Data EE Memory Code Protection (bitmask:0x0100)
CPD = ON | 0x3EFF | Data EEPROM memory code-protected.
CPD = OFF | 0x3FFF | Code Protection off.
WRT -- FLASH Program Memory Write Enable (bitmask:0x0200)
WRT = OFF | 0x3DFF | Unprotected program memory may not be written to by EECON control.
WRT = ON | 0x3FFF | Unprotected program memory may be written to by EECON control.
DEBUG -- In-Circuit Debugger Mode bit (bitmask:0x0800)
DEBUG = ON | 0x37FF | In-Circuit Debugger enabled, RB6 and RB7 are dedicated to the debugger.
DEBUG = OFF | 0x3FFF | In-Circuit Debugger disabled, RB6 and RB7 are general purpose I/O pins.
CP -- FLASH Program Memory Code Protection bits (bitmask:0x3030)
CP = ALL | 0x0FCF | 0000h to 1FFFh code protected.
CP = HALF | 0x1FDF | 1000h to 1FFFh code protected.
CP = UPPER_256 | 0x2FEF | 1F00h to 1FFFh code protected.
CP = OFF | 0x3FFF | Code protection off.

This page generated automatically by the device-help.pl program (2022-01-30 15:56:09 UTC) from the 8bit_device.info file (rev: 1.44) of mpasmx and from the gputils source package (rev: svn Unversioned directory). The mpasmx is included in the MPLAB X.