Intel 8XC196MC User Manual page 155

8XC196MC, MD, MH USER'S MANUAL
Internal Bus
Px_REG
SFDATA
Px_DIR
SFDIR
Px_MODE
Read Port
6-8
0
1
0
1
Sample
Latch
Px_PIN
Q D
LE
PH1 Clock
300ns Delay
RESET#
RESET#
Any Write to Px_MODE
Figure 6-2. Bidirectional Port Structure
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150Ω to 200Ω
Vcc
Vcc
R
Q
S
Vcc
Q1
I/O Pin
Q2
Vss
R1
Medium
Pullup
Q3
Weak
Pullup
Q4
A0238-04