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H8SX/1663M Datasheet(PDF) 540 Page - Renesas Technology Corp |
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H8SX/1663M Datasheet(HTML) 540 Page - Renesas Technology Corp |
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540 / 1504 page  Section 11 EXDMA Controller (EXDMAC) Rev. 2.00 Sep. 24, 2008 Page 508 of 1468 REJ09B0412-0200 (2) Normal Transfer Mode (Burst Mode) In burst mode, one-byte, one-word, or one-longword transfer is executed continuously until the transfer end condition is satisfied. Once burst transfer starts, requests from other channels, even of higher priority, are held pending until burst transfer ends. Figure 11.27 shows an example of transfer when ETEND output is enabled, and word-size, normal transfer mode (burst mode) is performed from external 16-bit, 2-state access space to external 16- bit, 2-state access space. EXDMA write Address bus EXDMA write EXDMA read B φ RD LHWR, LLWR ETEND Bus release Bus release Last transfer cycle Burst transfer EXDMA read EXDMA read EXDMA write Figure 11.27 Example of Normal Transfer Mode (Burst Mode) Transfer |
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