what all the configuration bits available in mplab ide for 16f877a ??

[rangerskm]

1) what is configuration bits?explain one by one.
2) whats the role of these bits with respect to pic 16f877a ?
3) any fault in these bits will affect my code ?
compiler used is hi tech c compiler.

 

[Jinzpaul4u]

hello there,

try these links

https://saeedsolutions.blogspot.in/2012/05/how-to-write-configuration-bits-for-pic.html

https://singularengineer.com/programming-pic-18-using-xc8-mplab-x-configuration-bits-2/

https://electronics.stackexchange.c...nfiguration-bits-for-a-pic-16f1829-in-mplab-x

**broken link removed**

best regards,

 

[nagkiller]

The Bits of fuse is same in the datasheet!!!
If you not use the fuses, the mcu works wrong or not run!!!
To see the all fuses available for the pic, search into folder (?:\Program Files (x86)\HI-TECH Software\PICC\X.XX\include\) the file pic16f877a.h... In this file have all about of the target pic.

//
// Configuration mask definitions
//


// Config Register: CONFIG
#define CONFIG               0x2007
// Oscillator Selection bits
// RC oscillator
#define FOSC_EXTRC           0xFFFF
// HS oscillator
#define FOSC_HS              0xFFFE
// XT oscillator
#define FOSC_XT              0xFFFD
// LP oscillator
#define FOSC_LP              0xFFFC
// Watchdog Timer Enable bit
// WDT enabled
#define WDTE_ON              0xFFFF
// WDT disabled
#define WDTE_OFF             0xFFFB
// Power-up Timer Enable bit
// PWRT disabled
#define PWRTE_OFF            0xFFFF
// PWRT enabled
#define PWRTE_ON             0xFFF7
// Brown-out Reset Enable bit
// BOR enabled
#define BOREN_ON             0xFFFF
// BOR disabled
#define BOREN_OFF            0xFFBF
// Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit
// RB3/PGM pin has PGM function; low-voltage programming enabled
#define LVP_ON               0xFFFF
// RB3 is digital I/O, HV on MCLR must be used for programming
#define LVP_OFF              0xFF7F
// Data EEPROM Memory Code Protection bit
// Data EEPROM code protection off
#define CPD_OFF              0xFFFF
// Data EEPROM code-protected
#define CPD_ON               0xFEFF
// Flash Program Memory Write Enable bits
// Write protection off; all program memory may be written to by EECON control
#define WRT_OFF              0xFFFF
// 0000h to 00FFh write-protected; 0100h to 1FFFh may be written to by EECON control
#define WRT_256              0xFDFF
// 0000h to 07FFh write-protected; 0800h to 1FFFh may be written to by EECON control
#define WRT_1FOURTH          0xFBFF
// 0000h to 0FFFh write-protected; 1000h to 1FFFh may be written to by EECON control
#define WRT_HALF             0xF9FF
// In-Circuit Debugger Mode bit
// In-Circuit Debugger disabled, RB6 and RB7 are general purpose I/O pins
#define DEBUG_OFF            0xFFFF
// In-Circuit Debugger enabled, RB6 and RB7 are dedicated to the debugger
#define DEBUG_ON             0xF7FF
// Flash Program Memory Code Protection bit
// Code protection off
#define CP_OFF               0xFFFF
// All program memory code-protected
#define CP_ON                0xDFFF

 

[rangerskm]

explain oscillator ,watch dog timer,power up timer,brown on detector,low voltage programming,data eeprom,flash program write protect, code protect .in the configuration bits .explain how it affects the pic ic ??

 

[nagkiller]

See Configuration Bits:
https://ww1.microchip.com/downloads/en/DeviceDoc/config.pdf
https://ww1.microchip.com/downloads/en/devicedoc/31027a.pdf and https://ww1.microchip.com/downloads/en/DeviceDoc/70231D.pdf