Chapter 22
Enhanced Direct Memory Access (eDMA)
22.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances, see the chip configuration information.
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 address and destination address calculations
• Data-movement operations
• Local memory containing transfer control descriptors for each of the 16 channels
22.1.1
eDMA system block diagram
Figure 22-1 illustrates the components of the eDMA system, including the eDMA
module ("engine").
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 425
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