8XC196L
X
SUPPLEMENT

5-6

Figure 5-2. Ports 3 and 4 Internal Structure (87C196LA, LB Only)
Q2
Q1
P
x
_REG
P34_DRV
Sample
Latch
PH1 Clock
Internal Bus
Address/Data
P
x
_PIN
DQ
Weak
Pullup
RESET# Q3
Q4
Buffer
Read Port
LE
300ns Delay
I/O Pin
Bus Control Select
0 = Address/Data
1 = I/O
RESET#
A5264-01
150 to 200R1
1
0
V
SS
Medium
Pullup
VSS
V
SS
V
CC