Datasheet

RM46L450

RM46L850

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SPNS184A –SEPTEMBER 2012–REVISED SEPTEMBER 2013

4.16 DMA Controller

The DMA controller is used to transfer data between two locations in the memory map in the background

of CPU operations. Typically, the DMA is used to:

• Transfer blocks of data between external and internal data memories

• Restructure portions of internal data memory

• Continually service a peripheral

4.16.1 DMA Features

• CPU independent data transfer

• One 64-bit master port that interfaces to the RM4x Memory System.

• FIFO buffer(4 entries deep and each 64bit wide)

• Channel control information is stored in RAM protected by parity

• 16 channels with individual enable

• Channel chaining capability

• 32 peripheral DMA requests

• Hardware and Software DMA requests

• 8, 16, 32 or 64-bit transactions supported

• Multiple addressing modes for source/destination (fixed, increment, offset)

• Auto-initiation

• Power-management mode

• Memory Protection with four configurable memory regions

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