PIC18F6525_13 Datasheet, PDF (123/400 Pages) Microchip Technology – 64/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with A/D

PIC18F6525/6621/8525/8621
FIGURE 10-20: RH3:RH0 PINS BLOCK DIAGRAM IN SYSTEM BUS MODE
RD PORTH
Q
D
ENEN
RD LATH
Data Bus
WR LATH
or
PORTH
D
Q
CK
Data Latch
Port
0
Data
1
WR TRISH
DQ
CK
TRIS Latch
System Bus
Control
RD TRISH
External Enable
Address Out
Drive System
To Instruction Register
Instruction Read
Note 1: I/O pins have diode protection to VDD and VSS.
I/O pin⁽¹⁾
TTL
Input
Buffer
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DS39612C-page 123