
PIC18C601/801
DS39541A-page 114
Advance Information
2001 Microchip Technology Inc.
FIGURE 9-10:
PORTE BLOCK DIAGRAM IN SYSTEM BUS MODE
To Instruction Register
External Enable
Data/Address Out
Drive System
System Bus
Control
Data Bus
WR LATE
WR TRISE
RD PORTE
Data Latch
TRIS Latch
RD TRISE
TTL
Input
Buffer
I/O pin(1)
Q
D
CK
Q
D
CK
EN
QD
EN
RD LATD
or
PORTE
0
1
Port
Data
Instruction Read
Note 1: I/O pins have diode protection to VDD and VSS.