Block Diagram Of The Dma Controller - Texas Instruments OMAP5910 Reference Manual

DSP DMA
7.1.3

Block Diagram of the DMA Controller

122 DSP Subsystem
Figure 64 is a conceptual diagram of connections between the DMA controller
and other parts of the DSP subsystem. The DMA controller ports in the
diagram are:
Four standard ports. The DMA controller has a standard port for each of
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the following resources: internal dual-access RAM (DARAM), internal
single-access RAM (SARAM), DSP external memory, and peripherals.
Data transfers among the standard ports occur in the six DMA channels.
(The DMA channels are described in section 7.2.3).
Auxiliary port. A fifth port supports data transfers between memory and the
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MPUI. The MPUI cannot access the peripheral port. Transfers between
the MPU and the DSP peripherals are supported through a direct
connection that does not involve the DSP DMA controller. Transfers
between the MPUI and the memory ports are handled by the DMA
controller but do not use a DMA channel.
It is possible for multiple channels (or for one or more channels and the MPUI)
to request access to the same standard port at the same time. To arbitrate
simultaneous requests, the DMA controller has one programmable service
chain configuration that is used by each of the standard ports. For details on
the service chain, see section 7.2.6.
SPRU890A