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TMS320C54CST Datasheet(PDF) 68 Page - Texas Instruments |
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TMS320C54CST Datasheet(HTML) 68 Page - Texas Instruments |
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68 / 171 page  Functional Overview 68 November 2001 − Revised September 2003 SPRS187B 3.18 DMA Subbank Addressed Registers The direct memory access (DMA) controller has several control registers associated with it. The main control register (DMPREC) is a standard memory-mapped register. However, the other registers are accessed using the subbank addressing scheme. This allows a set or subbank of registers to be accessed through a single memory location. The DMA subbank address (DMSA) register is used as a pointer to select a particular register within the subbank, while the DMA subbank data (DMSD) register or the DMA subbank data register with autoincrement (DMSDI) is used to access (read or write) the selected register. When the DMSDI register is used to access the subbank, the subbank address is automatically postincremented so that a subsequent access affects the next register within the subbank. This autoincrement feature is intended for efficient, successive accesses to several control registers. If the autoincrement feature is not required, the DMSDN register should be used to access the subbank. Table 3−25 shows the DMA controller subbank addressed registers and their corresponding subaddresses. Table 3−25. DMA Subbank Addressed Registers NAME ADDRESS SUB- ADDRESS DESCRIPTION DMSRC0 56h/57h 00h DMA channel 0 source address register DMDST0 56h/57h 01h DMA channel 0 destination address register DMCTR0 56h/57h 02h DMA channel 0 element count register DMSFC0 56h/57h 03h DMA channel 0 sync select and frame count register DMMCR0 56h/57h 04h DMA channel 0 transfer mode control register DMSRC1 56h/57h 05h DMA channel 1 source address register DMDST1 56h/57h 06h DMA channel 1 destination address register DMCTR1 56h/57h 07h DMA channel 1 element count register DMSFC1 56h/57h 08h DMA channel 1 sync select and frame count register DMMCR1 56h/57h 09h DMA channel 1 transfer mode control register DMSRC2 56h/57h 0Ah DMA channel 2 source address register DMDST2 56h/57h 0Bh DMA channel 2 destination address register DMCTR2 56h/57h 0Ch DMA channel 2 element count register DMSFC2 56h/57h 0Dh DMA channel 2 sync select and frame count register DMMCR2 56h/57h 0Eh DMA channel 2 transfer mode control register DMSRC3 56h/57h 0Fh DMA channel 3 source address register DMDST3 56h/57h 10h DMA channel 3 destination address register DMCTR3 56h/57h 11h DMA channel 3 element count register DMSFC3 56h/57h 12h DMA channel 3 sync select and frame count register DMMCR3 56h/57h 13h DMA channel 3 transfer mode control register DMSRC4 56h/57h 14h DMA channel 4 source address register DMDST4 56h/57h 15h DMA channel 4 destination address register DMCTR4 56h/57h 16h DMA channel 4 element count register DMSFC4 56h/57h 17h DMA channel 4 sync select and frame count register DMMCR4 56h/57h 18h DMA channel 4 transfer mode control register DMSRC5 56h/57h 19h DMA channel 5 source address register DMDST5 56h/57h 1Ah DMA channel 5 destination address register DMCTR5 56h/57h 1Bh DMA channel 5 element count register DMSFC5 56h/57h 1Ch DMA channel 5 sync select and frame count register DMMCR5 56h/57h 1Dh DMA channel 5 transfer mode control register DMSRCP 56h/57h 1Eh DMA source program page address (common channel) DMDSTP 56h/57h 1Fh DMA destination program page address (common channel) |
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