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M16C/26 датащи(PDF) 78 Page - Renesas Technology Corp |
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M16C/26 датащи(HTML) 78 Page - Renesas Technology Corp |
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78 / 239 page ![]() Renesas Technology Corp. DMAC 72 M16C/26 Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Under development Preliminary Specifications Rev. 0.9 Specifications in this manual are tentative and subject to change. Figure 1.11.5. Example of the transfer cycles for a source read BCLK Address bus RD signal WR signal Data bus CPU use CPU use CPU use CPU use Source Source Destination Destination Dummy cycle Dummy cycle (1) 8-bit transfers 16-bit transfers and the source address is even. BCLK Address bus RD signal WR signal Data bus CPU use CPU use CPU use CPU use Source Source Destination Destination Dummy cycle Dummy cycle (3) One wait is inserted into the source read under the conditions in (1) BCLK Address bus RD signal WR signal Data bus CPU use CPU use CPU use CPU use Source Source Destination Destination Dummy cycle Dummy cycle Source + 1 Source + 1 (2) 16-bit transfers and the source address is odd BCLK Address bus RD signal WR signal Data bus CPU use CPU use CPU use CPU use Source Source Destination Destination Dummy cycle Dummy cycle Source + 1 Source + 1 (4) One wait is inserted into the source read under the conditions in (2) Note: The same timing changes occur with the respective conditions at the destination as at the source |
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