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7721 Datasheet(PDF) 56 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) 56 Page - Renesas Technology Corp

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CONNECTION WITH EXTERNAL DEVICES
7721 Group User's Manual
3–9
3.2 Software Wait
Fig. 3.2.2 Examples of bus timing when software Wait is used (BYTE = “L”)
<No Wait>
Clock 1
A0—A7
A8/D8—A15/D15, A16/D0—A23/D7
E
ALE
Address
1 bus cycle
(Note)
Note: When the external data bus is 8 bits wide (BYTE = “H”), A8/D8 to A15/D15 operate with the same bus timing as A0 to A7.
Address
Data
Data
Address
Address
qInternal areas are always accessed with this waveform.
<Wait>
Clock 1
A0—A7
A8/D8—A15/D15, A16/D0—A23/D7
E
ALE
(Note)
1 bus cycle
Address
Address
Data
Data
Address
Address



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