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H8S/2225 数据表(PDF) 292 Page - Renesas Technology Corp |
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H8S/2225 数据表(HTML) 292 Page - Renesas Technology Corp |
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292 / 1071 page ![]() Section 8 DMA Controller (DMAC) Rev. 5.00 Aug 08, 2006 page 206 of 982 REJ09B0054-0500 • DMA control register_1A (DMACR_1A) • DMA control register_1B (DMACR_1B) • DMA band control register H (DMABCRH) • DMA band control register L (DMABCRL) • DMA write enable register (DMAWER) • DMA terminal control register (DMATCR) The functions of MAR, IOAR, ETCR, DMACR, and DMABCR differ according to the transfer mode (short address mode or full address mode). The transfer mode can be selected by means of the FAE1 and FAE0 bits in DMABCRH. The register configurations for short address mode and full address mode of channel 0 are shown in table 8.2. Table 8.2 Short Address Mode and Full Address Mode (Channel 0) FAE0 Description 0 Short address mode specified (channels 0A and 0B operate independently) MAR_0AH Specifies transfer source/transfer destination address Specifies transfer destination/transfer source address Specifies number of transfers Specifies transfer size, mode, activation source. Specifies transfer source/transfer destination address Specifies transfer destination/transfer source address Specifies number of transfers Specifies transfer size, mode, activation source. IOAR_0A ETCR_0A DMACR_0A MAR_0BH MAR_0AL MAR_0BL IOAR_0B ETCR_0B DMACR_0B 1 Full address mode specified (channels 0A and 0B operate in combination as channel 0) MAR_0AH Specifies transfer source address Specifies transfer destination address Not used Not used Specifies number of transfers Specifies number of transfers (used in block transfer mode only) Specifies transfer size, mode, activation source, etc. IOAR_0A ETCR_0A DMACR_0A MAR_0BH MAR_0AL MAR_0BL IOAR_0B ETCR_0B DMACR_0B |
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