PIC18F6X2X Datasheet, PDF (127/386 Pages) Microchip Technology – 64/80-Pin High Performance, 64-Kbyte Enhanced FLASH Microcontrollers with A/D

PIC18F6X2X/8X2X
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
 2003 Microchip Technology Inc.
Advance Information
DS39612A-page 125