T89C51RD2-3CSCM 查看數據表（PDF） - Atmel Corporation
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T89C51RD2-3CSCM Datasheet PDF : 104 Pages
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T89C51RD2
Table 47. AC Parameters for a Variable Clock
Symbol
TLHLL
TAVLL
TLLAX
TLLIV
TLLPL
TPLPH
TPLIV
TPXIX
TPXIZ
TAVIV
TPLAZ
Type
Min
Min
Min
Max
Min
Min
Max
Min
Max
Max
Max
Standard Clock
2T-x
T-x
T-x
4T-x
T-x
3T-x
3T-x
x
T-x
5T-x
x
X2 Clock
T-x
0.5 T - x
0.5 T - x
2T-x
0.5 T - x
1.5 T - x
1.5 T - x
x
0.5 T - x
2.5 T - x
x
X parameter for - X parameter for -
M range
L range
10
10
15
15
15
15
30
30
10
10
20
20
40
40
0
0
7
7
40
40
10
10
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
External Program Memory
Read Cycle
ALE
PSEN
PORT 0 INSTR IN
TLHLL
TLLAX
TAVLL
A0-A7
TLLIV
TLLPL
TPLPH
12 TCLCL
TPLIV
TPLAZ
TPXIX
INSTR IN
TPXAV
TPXIZ
A0-A7
PORT 2
ADDRESS
OR SFR-P2
TAVIV
ADDRESS A8-A15
INSTR IN
ADDRESS A8-A15
87
4243G–8051–05/03
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