PIC18F87J11_12 Datasheet, PDF (164/466 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Flash Microcontrollers

PIC18F87J11 FAMILY
11.10 PORTJ, TRISJ and
LATJ Registers
Note: PORTJ is available only on 80-pin devices.
PORTJ is an 8-bit wide, bidirectional port. All pins on
PORTJ are digital only and tolerate voltages up to 5.5V.
All pins on PORTJ are implemented with Schmitt
Trigger input buffers. Each pin is individually
configurable as an input or output.
Note: These pins are configured as digital inputs
on any device Reset.
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
is enabled by clearing the EBDIS control bit
(MEMCON<7>). The TRISJ bits are also overridden.
Each of the PORTJ pins has a weak internal pull-up. A
single control bit can turn off all the pull-ups. This is
performed by clearing bit RJPU (PORTG<5>). The
weak pull-up is automatically turned off when the port
pin is configured as an output. The pull-ups are
disabled on any device Reset.
EXAMPLE 11-10: INITIALIZING PORTJ
CLRF
CLRF
MOVLW
MOVWF
PORTJ
LATJ
H'CF'
TRISJ
; Initialize PORTG by
; clearing output
; data latches
; Alternate method to clear
; output data latches
; Value used to initialize
; data direction
; Set RJ3:RJ0 as inputs
; RJ5:RJ4 as output
; RJ7:RJ6 as inputs
DS39778E-page 164
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