Datasheet

PIC18F6520/8520/6620/8620/6720/8720
DS39609C-page 126  2003-2013 Microchip Technology Inc.
FIGURE 10-21: RJ4:RJ0 PINS BLOCK DIAGRAM IN SYSTEM BUS MODE
FIGURE 10-22: RJ7:RJ6 PINS BLOCK DIAGRAM IN SYSTEM BUS MODE
External Enable
Control Out
Drive System
System Bus
Control
Data Bus
WR LATJ
WR TRISJ
RD PORTJ
Data Latch
TRIS Latch
RD TRISJ
I/O pin
(1)
QD
CK
QD
CK
EN
QD
EN
RD LATJ
or
PORTJ
0
1
Port
Data
Note 1: I/O pins have diode protection to VDD and VSS.
WM = 01
UB
/LB Out
Drive System
System Bus
Control
Data Bus
WR LATJ
WR TRISJ
RD PORTJ
Data Latch
TRIS Latch
RD TRISJ
I/O pin
(1)
QD
CK
QD
CK
EN
QD
EN
RD LATJ
or
PORTJ
0
1
Port
Data
Note 1: I/O pins have diode protection to VDD and VSS.