PIC18F2510 MICROCHIP [Microchip Technology], PIC18F2510 Datasheet - Page 106
PIC18F2510
Manufacturer Part Number
PIC18F2510
Description
28/40/44-PIN FLASH MICROCONTROLLERS WITH 10-BIT A/D AND NANO WATT TECHNOLOGY
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2510.pdf
(380 pages)
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PIC18F2X1X/4X1X
9.4
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
configurable as an input or output.
Three of the PORTD pins are multiplexed with outputs
P1B, P1C and P1D of the enhanced CCP module. The
operation of these additional PWM output pins is
covered in greater detail in Section 15.0 “Enhanced
Capture/Compare/PWM (ECCP) Module”.
DS39636A-page 104
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.
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 9.6 “Parallel Slave
Port” for additional information on the Parallel Slave
Port (PSP).
EXAMPLE 9-4:
CLRF
CLRF
MOVLW
MOVWF
Note:
PORTD
LATD
0CFh
TRISD
When the enhanced PWM mode is used
with either dual or quad outputs, the PSP
functions of PORTD are automatically
disabled.
; 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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