PIC18F6525_13 Datasheet, PDF (112/400 Pages) Microchip Technology – 64/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with A/D

PIC18F6525/6621/8525/8621
FIGURE 10-10: PORTD BLOCK DIAGRAM IN SYSTEM BUS MODE
RD PORTD
QD
ENEN
RD LATD
Data Bus
WR LATD
or PORTD
WR TRISD
DQ
CK
Data Latch
DQ
CK
TRIS Latch
Port
0
Data
1
RD TRISD
System Bus
Control
Bus Enable
Data/TRIS Out
Drive Bus
Instruction Register
Instruction Read
Note 1: I/O pins have protection diodes to VDD and VSS.
I/O pin⁽¹⁾
TTL
Input
Buffer
DS39612C-page 112
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