PIC18F2480 MICROCHIP [Microchip Technology], PIC18F2480 Datasheet - Page 140
PIC18F2480
Manufacturer Part Number
PIC18F2480
Description
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2480.pdf
(484 pages)
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PIC18F2480/2580/4480/4580
10.4
PORTD is an 8-bit wide, bidirectional port. The corre-
sponding 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 con-
figurable as an input or output.
Four of the PORTD pins are multiplexed with outputs
P1A, P1B, P1C and P1D of the Enhanced CCP
module. The operation of these additional PWM output
pins is covered in greater detail in Section 16.0
“Enhanced
Module”.
Four of the PORTD pins are multiplexed with the input
pins of the comparators. The operation of these input
pins is covered in greater detail in Section 20.0
“Comparator Module”.
DS39637A-page 138
Note:
Note:
PORTD, TRISD and LATD
Registers
PORTD is only available on PIC18F4X80
devices.
On a Power-on Reset, these pins are
configured as analog inputs.
Capture/Compare/PWM
(ECCP)
Preliminary
PORTD can also be configured as an 8-bit wide micro-
processor port (Parallel Slave Port) by setting control
bit, PSPMODE (TRISE<4>). In this mode, the input
buffers are TTL. See Section 10.6 “Parallel Slave
Port” for additional information on the Parallel Slave
Port (PSP).
EXAMPLE 10-4:
CLRF
CLRF
MOVLW
MOVWF
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
2004 Microchip Technology Inc.
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