External data memory write cycle, Table 117, Table 117 and – Rainbow Electronics AT89C5122 User Manual
Page 196
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196
AT8xC5122/23
4202E–SCR–06/06
Table 117. AC Parameters for a Variable Clock
(warning x value differ from AT89C51RD2)
External Data Memory Write
Cycle
Symbol
Type
Standard
Clock
X2 Clock
X parameter
Units
T
RLRH
Min
6T - x
3 T - x
20
ns
T
WLWH
Min
6T - x
3 T - x
20
ns
T
RLDV
Max
5T - x
2.5 T - x
25
ns
T
RHDX
Min
x
x
0
ns
T
RHDZ
Max
2T - x
T - x
20
ns
T
LLDV
Max
8T - x
4T - x
40
ns
T
AVDV
Max
9T - x
4.5 T - x
60
ns
T
LLWL
Min
3T - x
1.5 T - x
25
ns
T
LLWL
Max
3T + x
1.5 T + x
25
ns
T
AVWL
Min
4T - x
2 T - x
25
ns
T
QVWX
Min
T - x
0.5 T - x
15
ns
T
QVWH
Min
7 T - x
3.5 T - x
25
ns
T
WHQX
Min
T - x
0.5 T - x
10
ns
T
RLAZ
Max
x
x
0
ns
T
WHLH
Min
T - x
0.5 T - x
15
ns
T
WHLH
Max
T - x
0.5 T + x
15
ns
T
QVWH
T
LLAX
ALE
PSEN
WR
PORT 0
PORT 2
A0-A7
DATA OUT
ADDRESS
OR SFR-P2
T
AVWL
T
LLWL
T
QVWX
ADDRESS A8-A15 OR SFR P2
T
WHQX
T
WHLH
T
WLWH
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