PIC18F2450 MICROCHIP [Microchip Technology], PIC18F2450 Datasheet - Page 109

• Manufacturer Part Number: PIC18F2450
• Description: 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

9.4
PORTD is an 8-bit wide, bidirectional port. The
corresponding data direction register is TRISD. Setting
a TRISD bit (= 1) will make the corresponding PORTD
pin an input (i.e., put the corresponding output driver in
a high-impedance mode). Clearing a TRISD bit (= 0)
will make the corresponding PORTD pin an output (i.e.,
put the contents of the output latch on the selected pin).
The Data Latch register (LATD) is also memory
mapped. Read-modify-write operations on the LATD
register read and write the latched output value for
PORTD.
All pins on PORTD are implemented with Schmitt
Trigger input buffers. Each pin is individually
configurable as an input or output.
© 2006 Microchip Technology Inc.
Note:
Note:
PORTD, TRISD and LATD
Registers
PORTD is only available on 40/44-pin
devices.
On a Power-on Reset, these pins are
configured as digital inputs.
Advance Information
EXAMPLE 9-4:
CLRF
CLRF
MOVLW
MOVWF
PIC18F2450/4450
PORTD
LATD
0CFh
TRISD
; Initialize PORTD by
; clearing output
; data latches
; Alternate method
; to clear output
; data latches
; Value used to
; initialize data
; direction
; Set RD<3:0> as inputs
; RD<5:4> as outputs
; RD<7:6> as inputs
INITIALIZING PORTD
DS39760A-page 107