AT87C54X2-3CSUL View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT87C54X2-3CSUL Datasheet PDF : 62 Pages
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AT/TS8xC54/8X2
Table 19-7. AC Parameters for a Variable Clock: derating formula
Standard
Symbol
Type
Clock
X2 Clock
-M
-V
-L
TLHLL
TAVLL
TLLAX
TLLIV
TLLPL
TPLPH
TPLIV
TPXIX
TPXIZ
TAVIV
TPLAZ
Min
2T-x
T-x
10
8
15
Min
T-x
0.5 T - x
15
13
20
Min
T-x
0.5 T - x
15
13
20
Max
4T-x
2T-x
30
22
35
Min
T-x
0.5 T - x
10
8
15
Min
3T-x
1.5 T - x
20
15
25
Max
3T-x
1.5 T - x
40
25
45
Min
x
x
0
0
0
Max
T-x
0.5 T - x
7
5
15
Max
5T-x
2.5 T - x
40
30
45
Max
x
x
10
10
10
19.5.3 External Program Memory Read Cycle
Figure 19-6. External Program Memory Read Cycle
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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
49
4431E–8051–04/06
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