<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd"> <html lang="en"> <head> <title>PIC16F877A</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <link rel="stylesheet" type="text/css" href="main.css"> </head> <body> <ul class="classMenu"> <li><a href="index.html">All</a></li> <li><a href="enhanced-mcus.html">Enhanced</a></li> <li><a href="extended-mcus.html">Extended</a></li> <li><a href="regular-mcus.html">Regular</a></li> <li><a href="12-bits-mcus.html">12 bits</a></li> <li><a href="14-bits-mcus.html">14 bits</a></li> <li><a href="16-bits-mcus.html">16 bits</a></li> <li><a href="mcus-by-ram-size.html">by RAM size</a></li> <li><a href="mcus-by-rom-size.html">by ROM size</a></li> <li><a href="mcus-by-eeprom-size.html">by EEPROM size</a></li> </ul> <ul class="tabs"> <li><a href="PIC16F877A-feat.html">Features</a></li> <li class="selected"><a href="PIC16F877A-conf.html">Configuration Bits</a></li> <li><a href="PIC16F877A-ram.html">RAM map</a></li> <li><a href="PIC16F877A-sfr.html">SFR map</a></li> </ul> <table class="configList"> <tr><th colspan=5 class="confTableName">PIC16F877A</th></tr> <tr class="confGap"><td></td></tr> <tr><th colspan=4 class="configWord">CONFIG (address:0x2007, mask:0xFFFF)</th></tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">FOSC -- Oscillator Selection bits</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">FOSC = LP</td> <td class="confSwValue">0x3FFC</td> <td class="confSwExpl">LP oscillator.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">FOSC = XT</td> <td class="confSwValue">0x3FFD</td> <td class="confSwExpl">XT oscillator.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">FOSC = HS</td> <td class="confSwValue">0x3FFE</td> <td class="confSwExpl">HS oscillator.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">FOSC = EXTRC</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">RC oscillator.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">WDTE -- Watchdog Timer Enable bit</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">WDTE = OFF</td> <td class="confSwValue">0x3FFB</td> <td class="confSwExpl">WDT disabled.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">WDTE = ON</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">WDT enabled.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">PWRTE -- Power-up Timer Enable bit</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">PWRTE = ON</td> <td class="confSwValue">0x3FF7</td> <td class="confSwExpl">PWRT enabled.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">PWRTE = OFF</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">PWRT disabled.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">BOREN -- Brown-out Reset Enable bit</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">BOREN = OFF</td> <td class="confSwValue">0x3FBF</td> <td class="confSwExpl">BOR disabled.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">BOREN = ON</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">BOR enabled.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">LVP -- Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">LVP = OFF</td> <td class="confSwValue">0x3F7F</td> <td class="confSwExpl">RB3 is digital I/O, HV on MCLR must be used for programming.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">LVP = ON</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">RB3/PGM pin has PGM function; low-voltage programming enabled.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">CPD -- Data EEPROM Memory Code Protection bit</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">CPD = ON</td> <td class="confSwValue">0x3EFF</td> <td class="confSwExpl">Data EEPROM code-protected.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">CPD = OFF</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">Data EEPROM code protection off.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">WRT -- Flash Program Memory Write Enable bits</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">WRT = HALF</td> <td class="confSwValue">0x39FF</td> <td class="confSwExpl">0000h to 0FFFh write-protected; 1000h to 1FFFh may be written to by EECON control.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">WRT = 1FOURTH</td> <td class="confSwValue">0x3BFF</td> <td class="confSwExpl">0000h to 07FFh write-protected; 0800h to 1FFFh may be written to by EECON control.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">WRT = 256</td> <td class="confSwValue">0x3DFF</td> <td class="confSwExpl">0000h to 00FFh write-protected; 0100h to 1FFFh may be written to by EECON control.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">WRT = OFF</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">Write protection off; all program memory may be written to by EECON control.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">DEBUG -- In-Circuit Debugger Mode bit</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">DEBUG = ON</td> <td class="confSwValue">0x37FF</td> <td class="confSwExpl">In-Circuit Debugger enabled, RB6 and RB7 are dedicated to the debugger.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">DEBUG = OFF</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">In-Circuit Debugger disabled, RB6 and RB7 are general purpose I/O pins.</td> <td class="vMargin"></td> </tr> <tr class="confGap"><td></td></tr> <tr><th colspan=3 class="confOptName">CP -- Flash Program Memory Code Protection bit</th></tr> <tr> <td class="vMargin"></td> <td class="confSwName">CP = ON</td> <td class="confSwValue">0x1FFF</td> <td class="confSwExpl">All program memory code-protected.</td> <td class="vMargin"></td> </tr> <tr> <td class="vMargin"></td> <td class="confSwName">CP = OFF</td> <td class="confSwValue">0x3FFF</td> <td class="confSwExpl">Code protection off.</td> <td class="vMargin"></td> </tr> </table> <div class="legendContainer"> <p class="srcInfo">This page generated automatically by the <a href="https://sourceforge.net/p/gputils/code/HEAD/tree/trunk/scripts/tools/device-help.pl"><em>device-help.pl</em></a> program (2013-05-17 07:55:35 UTC) from the <em>8bit_device.info</em> file (rev: 1.13) of <em>mpasmx</em> and from the <a href="http://gputils.sourceforge.net#Download">gputils</a> source package (rev: svn 979:980). The <em>mpasmx</em> is included in the <a href="http://www.microchip.com/pagehandler/en-us/family/mplabx">MPLAB X</a>.</p> </div> </body> </html>