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7721 Datasheet(PDF) 305 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) 305 Page - Renesas Technology Corp

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7721 Group User’s Manual
13-26
DMA CONTROLLER
13.3 Control
The above timing diagram applies on the following conditions:
• DMAACKi valid, TC valid
• External source (DMAREQi)
1
ALE
E
R/W
Address
Address/Data
DMAi enable bit
DMAi request bit
BUS REQUEST (DMAC)
Bus request sampling
DMAACKi
TC
ST1
ST0
DMAi interrupt request
bit
Transition of
right to use bus
SAR ± 1
SAR ± 1
L
0
0
When Burst transfer mode (edge sense) selected
When Burst transfer mode (level sense) selected
When Cycle-steal transfer mode selected
Terminate processing
Fig. 13.3.3 Timing example at normal termination



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