PIC18F1220ESLASHSOSQTP datasheet(177/308 Pages) MICROCHIP

177 / 308 page

DS39605F-page 175

PIC18F1220/1320

CONFIG3H: CONFIGURATION REGISTER 3 HIGH (BYTE ADDRESS 300005h)

CONFIG4L: CONFIGURATION REGISTER 4 LOW (BYTE ADDRESS 300006h)

R/P-1

U-0

MCLRE

—

bit 7

bit 0

bit 7

MCLRE: MCLR Pin Enable bit

=MCLR pin enabled, RA5 input pin disabled

= RA5 input pin enabled, MCLR disabled

bit 6-0

Unimplemented: Read as ‘0’

Legend:

R = Readable bit

P = Programmable bit

U = Unimplemented bit, read as ‘0’

-n = Value when device is unprogrammed

u = Unchanged from programmed state

R/P-1

U-0

R/P-1

U-0

R/P-1

DEBUG

—

—LVP

—STVR

bit 7

bit 0

bit 7

DEBUG: Background Debugger Enable bit (see note)

= Background debugger disabled, RB6 and RB7 configured as general purpose I/O pins

= Background debugger enabled, RB6 and RB7 are dedicated to In-Circuit Debug

bit 6-3

Unimplemented: Read as ‘0’

bit 2

LVP: Low-Voltage ICSP Enable bit

= Low-Voltage ICSP enabled

= Low-Voltage ICSP disabled

bit 1

Unimplemented: Read as ‘0’

bit 0

STVR: Stack Full/Underflow Reset Enable bit

= Stack full/underflow will cause Reset

= Stack full/underflow will not cause Reset

Legend:

R = Readable bit

C = Clearable bit

U = Unimplemented bit, read as ‘0’

-n = Value when device is unprogrammed

u = Unchanged from programmed state

Note:

The Timer1 oscillator shares the T1OSI and T1OSO pins with the PGD and PGC

pins used for programming and debugging.

When using the Timer1 oscillator, In-Circuit Serial Programming (ICSP) may not

function correctly (high voltage or low voltage), or the In-Circuit Debugger (ICD) may

not communicate with the controller. As a result of using either ICSP or ICD, the

Timer1 crystal may be damaged.

If ICSP or ICD operations are required, the crystal should be disconnected from the

circuit (disconnect either lead) or installed after programming. The oscillator loading

capacitors may remain in-circuit during ICSP or ICD operation.

PIC18F1220E/SOSQTP Datasheet(PDF) 177 Page - Microchip Technology

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