 2001 Microchip Technology Inc.

DS30603B-page 7

PIC16C50X

3.0

CONFIGURATION WORD

The PIC16C50X family members have several config-

uration bits. These bits can be programmed (reads ’0’),

or left unprogrammed (reads ’1’), to select various

device configurations. Figure 3-1 provides an overview

of configuration bits.

FIGURE 3-1:

CONFIGURATION WORD BIT MAP

Bit Number:

11

10

9

8

7

6

54

3

2

FOSC2

1

FOSC1

0

FOSC0

WDTE

bit 5:

MCLRE: RB3/MCLR Pin Function Select bit

1

= RB3/MCLR pin function is MCLR

0

bit 3:

WDTE: Watchdog Timer Enable bit

1

= WDT enabled

0

= WDT disabled

bit 2-0:

FOSC2:FOSC0: Oscillator Selection bits

111

= External RC oscillator/CLKOUT function on RB4/OSC2/CLKOUT pin

110

= External RC oscillator/RB4 function on RB4/OSC2/CLKOUT pin

101

= Internal RC oscillator/CLKOUT function on RB4/OSC2/CLKOUT pin

100

= Internal RC oscillator/RB4 function on RB4/OSC2/CLKOUT pin

011

= Invalid selection

010

= HS oscillator

001

= XT oscillator

000

= LP oscillator

Note 1: All of the CP pins have to be given the same value to enable the code protection scheme listed.

2: 03FFh is always uncode protected on the PIC16C505. This location contains the MOVLW xx

calibration instruction for the INTRC.

MCLRE

CP CP

CP

CP

CP

CP

CP

Register:

CONFIG

Address

0FFFh