PIC18F6410ESLASHPTSQTP datasheet(140/404 Pages) MICROCHIP

140 / 404 page

PIC18F6310/6410/8310/8410

DS39635A-page 138

Preliminary

 2004 Microchip Technology Inc.

10.9

PORTJ, TRISJ and

LATJ Registers

PORTJ is an 8-bit wide, bidirectional port. The corre-

sponding data direction register is TRISJ. Setting a

TRISJ bit (= 1) will make the corresponding PORTJ pin

an input (i.e., put the corresponding output driver in a

high-impedance mode). Clearing a TRISJ bit (= 0) will

make the corresponding PORTJ pin an output (i.e., put

the contents of the output latch on the selected pin).

The Data Latch register (LATJ) is also memory

mapped. Read-modify-write operations on the LATJ

PORTJ.

All pins on PORTJ are implemented with Schmitt

Trigger

input

buffers.

Each

individually

configurable as an input or output.

When the external memory interface is enabled, all of

the PORTJ pins function as control outputs for the

interface. This occurs automatically when the interface

enabled

clearing

the

EBDIS

control

bit

(MEMCON<7>). The TRISJ bits are also overridden.

EXAMPLE 10-9:

INITIALIZING PORTJ

Note:

PORTJ

available

only

PIC18F8310/8410 devices.

Note:

On a Power-on Reset, these pins are

configured as digital inputs.

CLRF

PORTJ

; Initialize PORTG by

; clearing output

; data latches

CLRF

LATJ

; Alternate method

; to clear output

; data latches

MOVLW 0xCF

; Value used to

; initialize data

; direction

MOVWF TRISJ

; Set RJ3:RJ0 as inputs

; RJ5:RJ4 as output

; RJ7:RJ6 as inputs

PIC18F6410E/PTSQTP Datasheet(PDF) 140 Page - Microchip Technology

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