AT87C54X2-3CSUL View Datasheet(PDF) - Atmel Corporation
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AT87C54X2-3CSUL Datasheet PDF : 62 Pages
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19.5.2 External Program Memory Characteristics
Table 19-5. Symbol Description
Symbol
T
TLHLL
TAVLL
TLLAX
TLLIV
TLLPL
TPLPH
TPLIV
TPXIX
TPXIZ
TPXAV
TAVIV
TPLAZ
Parameter
Oscillator clock period
ALE pulse width
Address Valid to ALE
Address Hold After ALE
ALE to Valid Instruction In
ALE to PSEN
PSEN Pulse Width
PSEN to Valid Instruction In
Input Instruction Hold After PSEN
Input Instruction FloatAfter PSEN
PSEN to Address Valid
Address to Valid Instruction In
PSEN Low to Address Float
Speed
Symbol
T
TLHLL
TAVLL
TLLAX
TLLIV
TLLPL
TPLPH
TPLIV
TPXIX
TPXIZ
TAVIV
TPLAZ
Table 19-6. AC Parameters for Fix Clock
-M
40 MHz
Min
Max
25
40
10
10
70
15
55
35
0
18
85
10
-V
X2 mode
30 MHz
60 MHz equiv.
Min
Max
33
25
4
4
45
9
35
25
0
12
53
10
-V
standard mode 40
MHz
Min
Max
25
42
12
12
78
17
60
50
0
20
95
10
-L
X2 mode
20 MHz
40 MHz equiv.
Min
Max
50
35
5
5
65
10
50
30
0
10
80
10
-L
standard mode
30 MHz
Min
Max
33
52
13
13
98
18
75
55
0
18
122
10
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
48 AT/TS8xC54/8X2
4431E–8051–04/06
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