PIC16C54AT-LP datasheet(46/194 Pages) MICROCHIP

46 / 194 page

PIC16C5X

DS30453D-page 44

Preliminary

9.1

Configuration Bits

Configuration bits can be programmed to select various

device configurations. Two bits are for the selection of

the oscillator type and one bit is the Watchdog Timer

enable bit. Nine bits are code protection bits for the

PIC16C54A,

PIC16CR54A,

PIC16C54C,

PIC16CR54C,

PIC16C55A,

PIC16C56A,

PIC16CR56A,

PIC16C57C,

PIC16CR57C,

PIC16C58B, and PIC16CR58B devices (Register 9-1).

One bit is for code protection for the PIC16C54,

PIC16C55,

PIC16C56

and

PIC16C57

devices

(Register 9-2).

QTP or ROM devices have the oscillator configuration

programmed at the factory and these parts are tested

accordingly (see "Product Identification System" dia-

grams in the back of this data sheet).

CONFIGURATION WORD FOR PIC16C54A/CR54A/C54C/CR54C/C55A/C56A/

CR56A/C57C/CR57C/C58B/CR58B

WDTE

FOSC1

FOSC0

bit 11

bit 0

bit 11-3:

CP: Code Protection Bit

= Code protection off

= Code protection on

bit 2:

WDTE: Watchdog timer enable bit

= WDT enabled

= WDT disabled

bit 1-0:

FOSC1:FOSC0: Oscillator Selection Bit

= LP oscillator

= XT oscillator

= HS oscillator

= RC oscillator

Note 1: Refer to the PIC16C5X Programming Specification (Literature Number DS30190) to determine how to

access the configuration word.

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

1 = bit is set

0 = bit is cleared

x = bit is unknown

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