All Enhanced Extended Regular 12 bits 14 bits 16 bits RAM
size ROM
size EEPROM
size Common
SFRs
Features Configuration Bits RAM map SFR map

PIC18C452
CONFIG1L (address:0x300000, mask:0xFF, default:0xFF)
CP -- Code Protection bits (bitmask:0xFF)
CP = ON | 0x00 | All of program memory code protected.
CP = OFF | 0xFF | Program memory code protection off.
CONFIG1H (address:0x300001, mask:0x27, default:0x27)
OSC -- Oscillator Selection bits (bitmask:0x07)
OSC = LP | 0xF8 | LP oscillator.
OSC = XT | 0xF9 | XT oscillator.
OSC = HS | 0xFA | HS oscillator.
OSC = RC | 0xFB | RC oscillator.
OSC = EC | 0xFC | EC oscillator w/OSC2 configured as divide-by-4 clock output.
OSC = ECIO | 0xFD | EC oscillator w/OSC2 configured as RA6.
OSC = HSPLL | 0xFE | HS oscillator with PLL enabled/Clock frequency = (4 x FOSC).
OSC = RCIO | 0xFF | RC oscillator w/OSC2 configured as RA6.
OSCS -- Oscillator System Clock Switch Enable bit (bitmask:0x20)
OSCS = ON | 0xDF | Oscillator system clock switch option is enabled (oscillator switching is enabled).
OSCS = OFF | 0xFF | Oscillator system clock switch option is disabled (main oscillator is source).
CONFIG2L (address:0x300002, mask:0x0F, default:0x0F)
PWRT -- Power-up Timer Enable bit (bitmask:0x01)
PWRT = ON | 0xFE | PWRT enabled.
PWRT = OFF | 0xFF | PWRT disabled.
BOR -- Brown-out Reset Enable bit (bitmask:0x02)
BOR = OFF | 0xFD | Brown-out Reset disabled.
BOR = ON | 0xFF | Brown-out Reset enabled.
BORV -- Brown-out Reset Voltage bits (bitmask:0x0C)
BORV = 45 | 0xF3 | VBOR set to 4.5V.
BORV = 42 | 0xF7 | VBOR set to 4.2V.
BORV = 27 | 0xFB | VBOR set to 2.7V.
BORV = 25 | 0xFF | VBOR set to 2.5V.
CONFIG2H (address:0x300003, mask:0x0F, default:0x0F)
WDT -- Watchdog Timer Enable bit (bitmask:0x01)
WDT = OFF | 0xFE | WDT disabled (control is placed on the SWDTEN bit).
WDT = ON | 0xFF | WDT enabled.
WDTPS -- Watchdog Timer Postscale Select bits (bitmask:0x0E)
WDTPS = 1 | 0xF1 | 1:1.
WDTPS = 2 | 0xF3 | 1:2.
WDTPS = 4 | 0xF5 | 1:4.
WDTPS = 8 | 0xF7 | 1:8.
WDTPS = 16 | 0xF9 | 1:16.
WDTPS = 32 | 0xFB | 1:32.
WDTPS = 64 | 0xFD | 1:64.
WDTPS = 128 | 0xFF | 1:128.
CONFIG3H (address:0x300005, mask:0x01, default:0x01)
CCP2MX -- CCP2 Mux bit (bitmask:0x01)
CCP2MX = OFF | 0xFE | CCP2 input/output is multiplexed with RB3.
CCP2MX = ON | 0xFF | CCP2 input/output is multiplexed with RC1.
CONFIG4L (address:0x300006, mask:0x01, default:0x01)
STVR -- Stack Full/Underflow Reset Enable bit (bitmask:0x01)
STVR = OFF | 0xFE | Stack Full/Underflow will not cause RESET.
STVR = ON | 0xFF | Stack Full/Underflow will cause RESET.

This page generated automatically by the device-help.pl program (2022-01-30 15:56:10 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.