AT80C51RA2-3CSCV View Datasheet(PDF) - International Rectifier
Part Name
Description
MFG CO.
'AT80C51RA2-3CSCV' PDF : 85 Pages View PDF
11.5.4
External Data Memory Characteristics
Symbol
TRLRH
TWLWH
TRLDV
TRHDX
TRHDZ
TLLDV
TAVDV
TLLWL
TAVWL
TQVWX
TQVWH
TWHQX
TRLAZ
TWHLH
Parameter
RD Pulse Width
WR Pulse Width
RD to Valid Data In
Data Hold After RD
Data Float After RD
ALE to Valid Data In
Address to Valid Data In
ALE to WR or RD
Address to WR or RD
Data Valid to WR Transition
Data set-up to WR High
Data Hold After WR
RD Low to Address Float
RD or WR High to ALE high
Speed
Symbol
TRLRH
TWLWH
TRLDV
TRHDX
TRHDZ
TLLDV
TAVDV
TLLWL
TAVWL
TQVWX
TQVWH
TWHQX
TRLAZ
TWHLH
Table 11-8. AC Parameters for a Fix Clock
-M
40 MHz
-V
X2 mode
30 MHz
60 MHz equiv.
-V
standard mode 40
MHz
-L
X2 mode
20 MHz
40 MHz equiv.
Min
Max
Min
Max
Min
Max
Min
Max
130
85
135
125
130
85
100
135
125
60
102
95
0
0
0
0
30
18
35
25
160
98
165
155
165
100
175
160
50
100
30
70
55
95
45
105
75
47
80
70
10
7
15
5
160
107
165
155
15
9
17
10
0
0
0
0
10
40
7
27
15
35
5
45
66 AT/TS8xC51Rx2
-L
standard mode
30 MHz
Min
Max
175
175
137
0
42
222
235
70
130
103
13
213
18
0
13
53
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
4188E–8051–08/06
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