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MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
16-1
Direct Memory Access (DMA) Controller
16
The MSC8113 multi-channel DMA system supports up to sixteen time-multiplexed channels and
buffer alignment by hardware. The DMA controller connects to both the system bus and local bus
and functions as a bridge between both buses. Transactions run simultaneously on both buses.
Flyby transactions (also known as single access transactions) can occur on either bus. The DMA
controller enables hot swap between time-multiplexed channels with no cost in clock cycles.
Synchronous and asynchronous transfers occur using sixteen priority levels or round-robin
priority on the bus and give a varying bus bandwidth per channel. The DMA controller services
up to thirty-two different requestors. A requestor can be any one of four external peripherals or
sixteen internal requests generated by the DMA FIFO itself, plus eight M1 flyby counters.
Using all the bus features, the DMA controller accommodates a total of seven different issued
bus transactions on both the system bus and the local bus. For example, each bus handles one
transaction in the data phase, one transaction in the address phase, and one pending transaction.
Each DMA channel handles a single unidirectional transaction at one time. The transaction can
be any one of the following (see Figure 16-1):
Memory to DMA FIFO
DMA FIFO to memory
Peripheral to DMA FIFO
DMA FIFO to peripheral
Memory to peripheral, in Flyby mode
Peripheral to memory, in Flyby mode
Internal memory to internal memory, in Flyby mode using flyby address counters
You can modify channel attributes. Each request activates a buffer according to its type, as
programmed in the dedicated parameter RAM.
Summary of Contents for MSC8113
Page 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Page 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
Page 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
Page 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Page 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Page 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Page 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Page 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Page 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Page 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Page 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Page 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Page 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Page 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Page 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Page 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Page 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Page 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Page 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Page 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...