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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320VC5407 датащи(PDF) 46 Page - Texas Instruments |
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TMS320VC5407 датащи(HTML) 46 Page - Texas Instruments |
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46 / 110 page  Functional Overview 46 November 2001 − Revised April 2004 SPRS007D Hex 0000 0030 0031 003F Reserved 7FFF 8000 0000 FFFF 0032 0033 Hex 0000 FFFF On-Chip DARAM4† 8K Words 9FFF A000 Reserved DRR22 DRR12 DXR22 DXR12 0034 0040 0041 0042 0043 DRR21 DRR11 DXR21 DXR11 0044 0020 0021 005F 0022 0023 DRR20 DRR10 DXR20 DXR10 0024 002F 001F 005F 0060 0080 On-Chip DARAM3† 8K Words 1FFF 2000 3FFF 4000 5FFF 6000 Scratch-Pad RAM 007F On-Chip DARAM2† 8K Words On-Chip DARAM1 8K Words On-Chip DARAM0 8K Words Data Space (See Breakout) I/O Space Data Space Data Space (0000 − 005F) Reserved Reserved Reserved Reserved † Reserved on the 5404 Figure 3−20. On-Chip DMA Memory Map for Data and IO Space (DLAXS = 0 and SLAXS = 0) 3.12.4 DMA Priority Level Each DMA channel can be independently assigned high- or low-priority relative to each other. Multiple DMA channels that are assigned to the same priority level are handled in a round-robin manner. 3.12.5 DMA Source/Destination Address Modification The DMA provides flexible address-indexing modes for easy implementation of data management schemes such as autobuffering and circular buffers. Source and destination addresses can be indexed separately and can be post-incremented, post-decremented, or post-incremented with a specified index offset. 3.12.6 DMA in Autoinitialization Mode The DMA can automatically reinitialize itself after completion of a block transfer. Some of the DMA registers can be preloaded for the next block transfer through the DMA reload registers (DMGSA, DMGDA, DMGCR, and DMGFR). Autoinitialization allows: • Continuous operation: Normally, the CPU would have to reinitialize the DMA immediately after the completion of the current block transfers, but with the reload registers, it can reinitialize these values for the next block transfer any time after the current block transfer begins. • Repetitive operation: The CPU does not preload the reload register with new values for each block transfer but only loads them on the first block transfer. |
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