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- Features
- Configuration Bits
- RAM map
- SFR map

PIC18F6490
CONFIG1H (address:0x300001, mask:0x07)
OSC -- Oscillator
| OSC = LP | 0xF0 | LP oscillator. |
| OSC = XT | 0xF1 | XT oscillator. |
| OSC = HS | 0xF2 | HS oscillator. |
| OSC = RC | 0xF3 | External RC oscillator, CLKO function on RA6. |
| OSC = EC | 0xF4 | EC oscillator, CLKO function on RA6. |
| OSC = ECIO | 0xF5 | EC oscillator, port function on RA6. |
| OSC = HSPLL | 0xF6 | HS oscillator, PLL enabled (clock frequency = 4 x FOSC1). |
| OSC = RCIO | 0xF7 | External RC oscillator, port function on RA6. |
| OSC = INTIO67 | 0xF8 | Internal oscillator block, port function on RA6 and RA7. |
| OSC = INTIO7 | 0xF9 | Internal oscillator block, CLKO function on RA6, port function on RA7. |
FCMEN -- Fail-Safe Clock Monitor Enable
| FCMEN = OFF | 0xBF | Fail-Safe Clock Monitor disabled. |
| FCMEN = ON | 0xFF | Fail-Safe Clock Monitor enabled. |
IESO -- Internal External Switch Over Mode
| IESO = OFF | 0x7F | Oscillator Switchover mode disabled. |
| IESO = ON | 0xFF | Oscillator Switchover mode enabled. |
CONFIG2L (address:0x300002, mask:0x1F)
PWRT -- Power Up Timer
| PWRT = ON | 0xFE | PWRT enabled. |
| PWRT = OFF | 0xFF | PWRT disabled. |
BOREN -- Brown Out Detect
| BOREN = OFF | 0xF9 | Brown-out Reset disabled in hardware and software. |
| BOREN = ON | 0xFB | Brown-out Reset enabled and controlled by software (SBOREN is enabled). |
| BOREN = NOSLP | 0xFD | Brown-out Reset enabled in hardware only and disabled in Sleep mode (SBOREN is disabled). |
| BOREN = SBORDIS | 0xFF | Brown-out Reset enabled in hardware only (SBOREN is disabled). |
BORV -- Brown Out Voltage
| BORV = 0 | 0xE7 | VBOR set to 4.6V. |
| BORV = 1 | 0xEF | VBOR set to 4.3V. |
| BORV = 2 | 0xF7 | VBOR set to 2.8V. |
| BORV = 3 | 0xFF | VBOR set to 2.1V. |
CONFIG2H (address:0x300003, mask:0x1F)
WDT -- Watchdog Timer
| WDT = OFF | 0xFE | WDT disabled (control is placed on the SWDTEN bit). |
| WDT = ON | 0xFF | WDT enabled. |
WDTPS -- Watchdog Postscaler
| WDTPS = 1 | 0xE1 | 1:1. |
| WDTPS = 2 | 0xE3 | 1:2. |
| WDTPS = 4 | 0xE5 | 1:4. |
| WDTPS = 8 | 0xE7 | 1:8. |
| WDTPS = 16 | 0xE9 | 1:16. |
| WDTPS = 32 | 0xEB | 1:32. |
| WDTPS = 64 | 0xED | 1:64. |
| WDTPS = 128 | 0xEF | 1:128. |
| WDTPS = 256 | 0xF1 | 1:256. |
| WDTPS = 512 | 0xF3 | 1:512. |
| WDTPS = 1024 | 0xF5 | 1:1024. |
| WDTPS = 2048 | 0xF7 | 1:2048. |
| WDTPS = 4096 | 0xF9 | 1:4096. |
| WDTPS = 8192 | 0xFB | 1:8192. |
| WDTPS = 16384 | 0xFD | 1:16384. |
| WDTPS = 32768 | 0xFF | 1:32768. |
CONFIG3H (address:0x300005, mask:0x81)
CCP2MX -- CCP2 Mux
| CCP2MX = PORTBE | 0xFE | CCP2 input/output is multiplexed with RE7. |
| CCP2MX = PORTC | 0xFF | CCP2 input/output is multiplexed with RC1. |
LPT1OSC -- Low Power Timer1 Osc enable
| LPT1OSC = OFF | 0xFB | Timer1 configured for higher power operation. |
| LPT1OSC = ON | 0xFF | Timer1 configured for low-power operation. |
MCLRE -- Master Clear Enable
| MCLRE = OFF | 0x7F | RG5 input pin enabled; MCLR disabled. |
| MCLRE = ON | 0xFF | MCLR pin enabled; RG5 input pin disabled. |
CONFIG4L (address:0x300006, mask:0x81)
STVREN -- Stack Overflow Reset
| STVREN = OFF | 0xFE | Stack full/underflow will not cause Reset. |
| STVREN = ON | 0xFF | Stack full/underflow will cause Reset. |
XINST -- Extended Instruction Set Enable bit
| XINST = OFF | 0xBF | Instruction set extension and Indexed Addressing mode disabled (Legacy mode). |
| XINST = ON | 0xFF | Instruction set extension and Indexed Addressing mode enabled. |
DEBUG -- Background Debugger Enable bit
| DEBUG = ON | 0x7F | Background debugger enabled, RB6 and RB7 are dedicated to In-Circuit Debug. |
| DEBUG = OFF | 0xFF | Background debugger disabled, RB6 and RB7 configured as general purpose I/O pins. |
CONFIG5L (address:0x300008, mask:0x01)
CP -- Code Protect 00000-03FFF
| CP = ON | 0xFE | Program memory block (000000-003FFFh) code-protected. |
| CP = OFF | 0xFF | Program memory block (000000-003FFFh) not code-protected. |

This page generated automatically by the device-help.pl program (2013-08-01 15:50:29 UTC) from the 8bit_device.info file (rev: 1.14) of mpasmx and from the gputils source package (rev: svn 983:985). The mpasmx is included in the MPLAB X.