Table 97 – Rainbow Electronics T89C51CC01 User Manual
Page 138
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138
T89C51CC01
Rev. D – 17-Dec-01
Table 97. AC Parameters for a Variable Clock
19.4.3 External Program
Memory Read Cycle
Symbol
Type
Standard
Clock
X2 Clock
X parameter
Units
T
LHLL
Min
2 T - x
T - x
10
ns
T
AVLL
Min
T - x
0.5 T - x
15
ns
T
LLAX
Min
T - x
0.5 T - x
15
ns
T
LLIV
Max
4 T - x
2 T - x
30
ns
T
LLPL
Min
T - x
0.5 T - x
10
ns
T
PLPH
Min
3 T - x
1.5 T - x
20
ns
T
PLIV
Max
3 T - x
1.5 T - x
40
ns
T
PXIX
Min
x
x
0
ns
T
PXIZ
Max
T - x
0.5 T - x
7
ns
T
AVIV
Max
5 T - x
2.5 T - x
40
ns
T
PLAZ
Max
x
x
10
ns
T
PLIV
TPLAZ
ALE
PSEN
PORT 0
PORT 2
A0-A7
A0-A7
INSTR IN
INSTR IN
INSTR IN
ADDRESS
OR SFR-P2
ADDRESS A8-A15
ADDRESS A8-A15
12 T
CLCL
T
AVIV
T
LHLL
T
AVLL
T
LLIV
T
LLPL
T
PLPH
T
PXAV
T
PXIX
T
PXIZ
T
LLAX
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