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7721 Datasheet(PDF) 316 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) 316 Page - Renesas Technology Corp

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DMA CONTROLLER
7721 Group User’s Manual
13-37
13.4 Operation
[Precautions for 2-bus cycle transfer]
When the 16-bit external data bus width = 16 bits and the transfer unit = 16 bits under the following
conditions, 2-bus cycle transfer cannot be performed. (Refer to “Table 13.4.1.”)
• Conditions for transfer destination
Transfer destination = DRAM area, Address direction = Backward, Data’s start address = Odd
address
• Conditions for transfer source and destination
Transfer source = DRAM area, Address direction = Backward, Data’s start address = Odd address
Transfer destination = DRAM area



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