83C152JD Intel Corporation, 83C152JD Datasheet - Page 9

• Manufacturer Part Number: 83C152JD
• Description: UNIVERSAL COMMUNICATION CONTROLLER 8-BIT MICROCONTROLLER
• Manufacturer: Intel Corporation

EXPLANATION OF THE AC SYMBOLS
Each timing symbol has 5 characters The first char-
acter is always a ‘T’ (stands for time) The other
characters depending on their positions stand for
the name of a signal or the logical status of that
signal The following is a list of all the characters and
what they stand for
A
C
D
H
I
L
Instruction (program memory contents)
Logic level LOW or ALE
Address
Clock
Input data
Logic level HIGH
MAX I
MAX I
cc
(ACTIVE)
cc
(IDLE)
Figure 5 I
e
e
(0 8
(2 24
CC
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c
vs Frequency
c
FREQ)
For example
FREQ)
P
Q
R
T
V
W
X
Z
TAVLL
TLLPL
Time
PSEN
Valid
No longer a valid logic level
Float
a
Output data
READ signal
WRITE signal
a
2 2 (Note 6)
e
e
4 16 (Note 6)
Time for ALE Low to PSEN Low
Time for Address Valid to ALE Low
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