Direct Memory Access (DMA)

DMA Purpose and Benefits

DMA Controller Structure

Channel and Stream Concepts

Request Mapping

Source and Destination Addresses

Transfer Direction

Data Width Configuration

Transfer Count and Size

Normal Mode

Circular Mode

Double Buffer Mode

FIFO Mode (where available)

DMA Request Sources

Peripheral-specific Configuration

Transfer Complete Interrupt

Half Transfer Interrupt

Transfer Error Interrupt

FIFO Error Interrupt

DMA Status Flags

Memory Alignment

Burst Transfers

Priority Levels

Arbitration Schemes