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H8SX1663 データシート(PDF) 433 Page - Renesas Technology Corp |
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H8SX1663 データシート(HTML) 433 Page - Renesas Technology Corp |
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433 / 1158 page  Section 7 DMA Controller (DMAC) Rev.1.00 Jun. 07, 2006 Page 381 of 1102 REJ09B0294-0100 (2) Single Address Mode (Write and Cycle Stealing) In single address mode, data of one byte, one word, or one longword is transferred at a single transfer request and after the transfer the bus is released temporarily. One bus cycle or more by the CPU or DTC are executed in the bus released cycles. In figure 7.35, the TEND signal output is enabled and data is transferred in bytes from the external 8-bit 2-state access space to the external device in single address mode (write). Bus released Bus released DMA write cycle B φ Address bus Bus released Bus released Last transfer cycle TEND DACK DMA write cycle DMA write cycle DMA write cycle LLWR Bus released Figure 7.35 Example of Transfer in Single Address Mode (Byte Write) |
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