PIC16F628-20P Datasheet, PDF (94/170 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontroller

PIC16F62X
REGISTER 14-1: CONFIGURATION WORD
CP1
CP0
CP1
CP0
—
CPD
LVP BODEN MCLRE FOSC2 PWRTE WDTE F0SC1 F0SC0
bit 13
bit 0
bit 13-10:
bit 9:
bit 8:
bit 7:
bit 6:
bit 5:
bit 3:
bit 2:
bit 4, 1-0:
CP1:CP0: Code Protection bits ⁽²⁾
Code protection for 2K program memory
11 = Program memory code protection off
10 = 0400h-07FFh code protected
01 = 0200h-07FFh code protected
00 = 0000h-07FFhcode protected
Code protection for 1K program memory
11 = Program memory code protection off
10 = Program memory code protection off
01 = 0200h-03FFh code protected
00 = 0000h-03FFh code protected
Unimplemented: Read as ‘0’
CPD: Data Code Protection bit⁽³⁾
1 = Data memory code protection off
0 = Data memory code protected
LVP: Low Voltage Programming Enable
1 = RB4/PGM pin has PGM function, low voltage programming enabled
0 = RB4/PGM is digital I/O, HV on MCLR must be used for programming
BODEN: Brown-out Detect Reset Enable bit ⁽¹⁾
1 = BOD Reset enabled
0 = BOD Reset disabled
MCLRE: RA5/MCLR pin function select
1 = RA5/MCLR pin function is MCLR
0 = RA5/MCLR pin function is digital Input, MCLR internally tied to VDD
PWRTEN: Power-up Timer Enable bit ⁽¹⁾
1 = PWRT disabled
0 = PWRT enabled
WDTEN: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled
FOSC2:FOSC0: Oscillator Selection bits⁽⁴⁾
111 = ER oscillator: CLKOUT function on RA6/OSC2/CLKOUT pin, Resistor on RA7/OSC1/CLKIN
110 = ER oscillator: I/O function on RA6/OSC2/CLKOUT pin, Resistor on RA7/OSC1/CLKIN
101 = INTRC oscillator: CLKOUT function on RA6/OSC2/CLKOUT pin, I/O function on RA7/OSC1/CLKIN
100 = INTRC oscillator: I/O function on RA6/OSC2/CLKOUT pin, I/O function on RA7/OSC1/CLKIN
011 = EC: I/O function on RA6/OSC2/CLKOUT pin, CLKIN on RA7/OSC1/CLKIN
010 = HS oscillator: High speed crystal/resonator on RA6/OSC2/CLKOUT and RA7/OSC1/CLKIN
001 = XT oscillator: Crystal/resonator on RA6/OSC2/CLKOUT and RA7/OSC1/CLKIN
000 = LP oscillator: Low power crystal on RA6/OSC2/CLKOUT and RA7/OSC1/CLKIN
Note 1: Enabling Brown-out Detect Reset automatically enables Power-up Timer (PWRT) regardless of the value of bit PWRTE.
Ensure the Power-up Timer is enabled anytime Brown-out Detect Reset is enabled.
2: All of the CP1:CP0 pairs have to be given the same value to enable the code protection scheme listed.
3: The entire data EEPROM will be erased when the code protection is turned off.
4: When MCLR is asserted in INTRC or ER mode, the internal clock oscillator is disabled.
Legend
R = Readable bit
-n = Value at POR
W = Writable bit
1 = bit is set
U = Unimplemented bit, read as ‘0’
0 = bit is cleared
x = bit is unknown
DS40300C-page 92
Preliminary
 2003 Microchip Technology Inc.