Information

Chapter 21
Direct Memory Access Controller (eDMA)
21.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances see the chip configuration chapter.
The enhanced direct memory access (eDMA) controller is a second-generation module
capable of performing complex data transfers with minimal intervention from a host
processor. The hardware microarchitecture includes:
• A DMA engine that performs:
• Source- and destination-address calculations
• Data-movement operations
• Local memory containing transfer control descriptors for each of the 4 channels
21.1.1 Block diagram
This diagram illustrates the eDMA module.
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 333