PIC18FXX20 Datasheet, PDF (129/366 Pages) Microchip Technology – 64/80-Pin High Performance 1 Mbit Enhanced FLASH Microcontrollers with A/D

PIC18FXX20
TABLE 10-17: PORTJ FUNCTIONS
Name
RJ0/ALE
Bit# Buffer Type
bit0
ST
RJ1/OE
bit1
ST
RJ2/WRL
bit2
ST
RJ3/WRH
bit3
ST
RJ4/BA0
bit4
ST
RJ5/CE
bit5
ST
RJ6/LB
bit6
ST
RJ7/UB
bit7
ST
Legend: ST = Schmitt Trigger input
Function
Input/output port pin or Address Latch Enable control for external
memory interface.
Input/output port pin or Output Enable control for external memory
interface.
Input/output port pin or Write Low Byte control for external memory
interface.
Input/output port pin or Write High Byte control for external memory
interface.
Input/output port pin or Byte Address 0 control for external memory
interface.
Input/output port pin or Chip Enable control for external memory
interface.
Input/output port pin or Lower Byte Select control for external
memory interface.
Input/output port pin or Upper Byte Select control for external
memory interface.
TABLE 10-18: SUMMARY OF REGISTERS ASSOCIATED WITH PORTJ
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
PORTJ Read PORTJ pin/Write PORTJ Data Latch
LATJ
LATJ Data Output Register
TRISJ
Data Direction Control Register for PORTJ
Legend: x = unknown, u = unchanged
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on
all other
RESETS
xxxx xxxx
xxxx xxxx
1111 1111
uuuu uuuu
uuuu uuuu
1111 1111
 2003 Microchip Technology Inc.
Advance Information
DS39609A-page 127