PIC18FXX20 Datasheet, PDF (128/366 Pages) Microchip Technology – 64/80-Pin High Performance 1 Mbit Enhanced FLASH Microcontrollers with A/D

PIC18FXX20
FIGURE 10-21:
RJ4:RJ0 PINS BLOCK DIAGRAM IN SYSTEM BUS MODE
RD PORTJ
Q
D
ENEN
RD LATJ
Data Bus
WR LATJ
or
PORTJ
D
Q
CK
Data Latch
Port ₀
Data ₁
WR TRISJ
DQ
CK
TRIS Latch
RD TRISJ
System Bus
Control
Control Out
External Enable
Drive System
Note 1: I/O pins have diode protection to VDD and VSS.
I/O pin⁽¹⁾
FIGURE 10-22: RJ7:RJ6 PINS BLOCK DIAGRAM IN SYSTEM BUS MODE
RD PORTJ
Q
D
ENEN
RD LATJ
Data Bus
WR LATJ
or
PORTJ
WR TRISJ
D
Q
CK
Data Latch
DQ
CK
TRIS Latch
Port ₀
Data ₁
System Bus
Control
RD TRISJ
UB/LB Out
WM = 01
Drive System
Note 1: I/O pins have diode protection to VDD and VSS.
I/O pin⁽¹⁾
DS39609A-page 126
Advance Information
 2003 Microchip Technology Inc.