AT80C51RA2-3CSCV View Datasheet(PDF) - International Rectifier
Part Name
Description
MFG CO.
'AT80C51RA2-3CSCV' PDF : 85 Pages View PDF
11.5.2
External Program Memory Characteristics
Table 11-5. 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
Table 11-6. AC Parameters for Fix Clock
Speed
Symbol
T
TLHLL
TAVLL
TLLAX
TLLIV
TLLPL
TPLPH
TPLIV
TPXIX
TPXIZ
TAVIV
TPLAZ
-M
40 MHz
-V
X2 mode
30 MHz
60 MHz equiv.
-V
standard
mode
40 MHz
-L
X2 mode
20 MHz
40 MHz equiv.
-L
standard
mode
30 MHz
Min Max Min Max Min Max Min Max Min Max
25
33
25
50
33
40
25
42
35
52
10
4
12
5
13
10
4
12
5
13
70
45
78
65
98
15
9
17
10
18
55
35
60
50
75
35
25
50
30
55
0
0
0
0
0
18
12
20
10
18
85
53
95
80
122
10
10
10
10
10
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
64 AT/TS8xC51Rx2
4188E–8051–08/06
Share Link: 
