PIC18C658 MICROCHIP [Microchip Technology], PIC18C658 Datasheet - Page 106
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PIC18C658
Manufacturer Part Number
PIC18C658
Description
High-Performance Microcontrollers with CAN Module
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18C658.pdf
(366 pages)
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PIC18CXX8
8.9
PORTJ is an 8-bit wide, bi-directional port available
only on the PIC18C858 devices. The corresponding
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
hi-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).
Read-modify-write operations on the LATJ register
read and write the latched output value for PORTJ.
PORTJ on the PIC18C858 is an 8-bit port with Schmitt
Trigger input buffers. Each pin is individually config-
urable as an input or output.
FIGURE 8-18: PORTJ BLOCK DIAGRAM
DS30475A-page 106
Note:
PORTJ, LATJ, and TRISJ Registers
Note:
This port is available on PIC18C858.
RD PORTJ
Data Bus
WR LATJ
or
WR PORTJ
WR TRISJ
I/O pins have diode protection to V
D
TRIS Latch
D
Data Latch
CK
CK
RD TRISJ
RD LATJ
Q
Q
Q
Q
Advanced Information
DD
and V
SS
.
Q
EXAMPLE 8-9:
CLRF
CLRF
MOVLW
MOVWF
EN
D
PORTJ
LATJ
0xCF
TRISJ
V
N
V
P
SS
DD
Schmitt
Trigger
INITIALIZING PORTJ
; Initialize PORTJ by
; Alternate method
; RJ5:RJ4 as outputs
; RJ7:RJ6 as inputs
; clearing output
; data latches
; to clear output
; data latches
; Value used to
; initialize data
; direction
; Set RJ3:RJ0 as inputs
2000 Microchip Technology Inc.
I/O Pin
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