PIC16F526 Datasheet, PDF (44/122 Pages) Microchip Technology – 14-Pin, 8-Bit Flash Microcontroller

PIC16F526
REGISTER 8-1: CONFIG: CONFIGURATION WORD REGISTER
CPDF
IOSCFS
MCLRE
CP
WDTE
FOSC2
FOSC1
FOSC0
bit 7
bit 0
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
CPDF: Code Protection bit – Flash Data Memory
1 = Code protection off
0 = Code protection on
IOSCFS: Internal Oscillator Frequency Select bit
1 = 8 MHz INTOSC frequency
0 = 4 MHz INTOSC frequency
MCLRE: Master Clear Enable bit
1 = RB3/MCLR pin functions as MCLR
0 = RB3/MCLR pin functions as RB3, MCLR internally tied to VDD
CP: Code Protection bit – User Program Memory
1 = Code protection off
0 = Code protection on
WDTE: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled
FOSC<2:0>: Oscillator Selection bits
000 = LP oscillator and 18 ms DRT
001 = XT oscillator and 18 ms DRT
010 = HS oscillator and 18 ms DRT
011 = EC oscillator with RB4 function on RB4/OSC2/CLKOUT and 1 ms DRT⁽¹⁾
100 = INTRC with RB4 function on RB4/OSC2/CLKOUT and 1 ms DRT⁽¹⁾
101 = INTRC with CLKOUT function on RB4/OSC2/CLKOUT and 1 ms DRT⁽¹⁾
110 = EXTRC with RB4 function on RB4/OSC2/CLKOUT and 1 ms DRT⁽¹⁾
111 = EXTRC with CLKOUT function on RB4/OSC2/CLKOUT and 1 ms DRT⁽¹⁾
Note 1: Refer to the “PIC16F526 Memory Programming Specification”, DS41317 to determine how to access the
Configuration Word.
2: DRT length (18 ms or 1 ms) is a function of Clock mode selection. It is the responsibility of the application
designer to ensure the use of either 18 ms (nominal) DRT or the 1 ms (nominal) DRT will result in
acceptable operation. Refer to Section 14.1 “DC Characteristics: PIC16F526 (Industrial)” and
Section 14.2 “DC Characteristics: PIC16F526 (Extended)” for VDD rise time and stability requirements
for this mode of operation.
DS41326D-page 44
 2010 Microchip Technology Inc.