T89C51RD2-SMSC-M View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'T89C51RD2-SMSC-M' PDF : 86 Pages View PDF
Symbol
TRLRH
TWLWH
TRLDV
TRHDX
TRHDZ
TLLDV
TAVDV
TLLWL
TLLWL
TAVWL
TQVWX
TQVWH
TWHQX
TRLAZ
TWHLH
TWHLH
T89C51RD2
Table 43. AC Parameters for a Variable Clock
Type
Standard
Clock
X2 Clock
X parameter X parameter
for -M range for -L range
Min
6T-x
3T-x
20
20
Min
6T-x
3T-x
20
20
Max
5T-x
2.5 T - x
25
25
Min
x
x
0
0
Max
2T-x
T-x
20
20
Max
8T-x
4T -x
40
40
Max
9T-x
4.5 T - x
60
60
Min
3T-x
1.5 T - x
25
25
Max
3T+x
1.5 T + x
25
25
Min
4T-x
2T-x
25
25
Min
T-x
0.5 T - x
15
15
Min
7T-x
3.5 T - x
15
15
Min
T-x
0.5 T - x
10
10
Max
x
x
0
0
Min
T-x
0.5 T - x
15
15
Max
T+x
0.5 T + x
15
15
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
9.5.5. External Data Memory Write Cycle
ALE
PSEN
WR
PORT 0
PORT 2
ADDRESS
OR SFR-P2
TWHLH
TLLWL
TWLWH
TLLAX
A0-A7
TAVWL
TQVWX
TQVWH
DATA OUT
ADDRESS A8-A15 OR SFR P2
TWHQX
Rev. F - 15 February, 2001
80
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