8XC152JA JB JC JD
MAX I
cc
(ACTIVE)
e
(2 24
c
FREQ)
a
4 16 (Note 6)
MAX I
cc
(IDLE)
e
(0 8
c
FREQ)
a
2 2 (Note 6)
270431– 7
Figure 5 I
CC
vs Frequency
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 Address
C Clock
D Input data
H Logic level HIGH
I Instruction (program memory contents)
L Logic level LOW or ALE
P
Q
R
T
V
W
X
Z
PSEN
Output data
READ signal
Time
Valid
WRITE signal
No longer a valid logic level
Float
For example
TAVLL
e
Time for Address Valid to ALE Low
TLLPL
e
Time for ALE Low to PSEN Low
9
INTEL [ INTEL CORPORATION ]
