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18F8680 Datasheet(PDF) 149 Page - Microchip Technology

Part # 18F8680
Description  64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module
PDF  496 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

18F8680 Datasheet(HTML) 149 Page - Microchip Technology

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 2004 Microchip Technology Inc.
DS30491C-page 147
PIC18F6585/8585/6680/8680
FIGURE 10-24:
RH3:RH0 PINS BLOCK DIAGRAM IN SYSTEM BUS MODE
To Instruction Register
External Enable
Address Out
Drive System
System Bus
Control
Data Bus
WR LATH
WR TRISH
RD PORTH
Data Latch
TRIS Latch
RD TRISH
TTL
Input
Buffer
I/O pin(1)
Q
D
CK
Q
D
CK
EN
QD
EN
RD LATD
or
PORTH
0
1
Port
Data
Instruction Read
Note 1: I/O pins have diode protection to VDD and VSS.



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