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7721 Datasheet(PDF) 412 Page - Renesas Technology Corp

Part # 7721
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7721 Datasheet(HTML) 412 Page - Renesas Technology Corp

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APPLICATION
7721 Group User’s Manual
16–9
16.1 Memory connection
Table 16.1.4 Calculation formulas and Values for each
parameter in Figure 16.1.5 (unit : ns)
Calculation formulas and Values
No Wait
Wait
tw(EL)
td(E-DLQ)
td(E-DHQ)
th(E-DLQ)
th(E-DHQ)
2 ! 109
f(XIN)
–25
4 ! 109
f(XIN)
–25
1 ! 109
f(XIN)
–22
35
Fig. 16.1.6 Relationship between tsu(D) and f(XIN)
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
0
100
200
300
400
500
600
506
435
379
335
298
268
242
220
201
185 170
157 145
135 125 116
108 101 95
220
185
157
135
116
101
88
77
68
60
52
46
40
35
30
25
21
18
15
No Wait
Wait
External clock input frequency f(XIN)
[MHz]
[ns]



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