Dma Functional Description; Dma Block Diagram; Dma Overview; Figure 22. Dma Block Diagram - ST STM32F410 Reference Manual

Direct memory access controller (DMA)
8.3

DMA functional description

8.3.1

DMA block diagram

Figure 22
8.3.2

DMA overview

The DMA controller performs direct memory transfer: as an AHB master, it can take the
control of the AHB bus matrix to initiate AHB transactions.
It carries out the following transactions:
•
peripheral-to-memory
• memory-to-peripheral
•
memory-to-memory
The DMA controller provides two AHB master ports: the AHB memory port, intended to be
connected to memories and the AHB peripheral port, intended to be connected to
peripherals. However, to allow memory-to-memory transfers, the AHB peripheral port must
also have access to the memories.
The AHB slave port is used to program the DMA controller (it supports only 32-bit
accesses).
See Figure 23
164/771
shows the block diagram of a DMA.

Figure 22. DMA block diagram

for the implementation of the system of two DMA controllers.
RM0401 Rev 3
RM0401