RM0319 datasheet(352/368 Pages) STMICROELECTRONICS

部件名	RM0319

功能描述	SPEAr320S architecture and functionality

PDF	368 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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352 / 368 page

DMA controller (DMAC)

RM0319

352/368

Doc ID 022640 Rev 3

36.3

Functional description

Figure 116. DMAC block diagram

For the DMA channel assignment, please refer to the DMA_CHN_CFG register description

in the System configuration registers (MISC) section of RM0321: SPEAr320S address map

and registers.

36.3.1

Signal interfaces

The DMAC directly interfaces with the signals summarized in Table 124. A functional

diagram of these signal interfaces is given in Figure 117.

Figure 117. DMAC signal interface diagram

DMA

REQUEST

AND

RESPONSE

BLOCK

AHB SLAVE

INTERFACE

CHANNEL 0

CHANNEL 1

CHANNEL 7

AHB

MAST

I/F

AHB

MAST

I/F

AHB MASTER

AHB MASTER 2

AHB

BUS

DMACTC[15:0]

DMACCLR[15:0]

DMACSREQ[15:0]

DMACBREQ[15:0]

DMACLSREQ[15:0]

DMACLBREQ[15:0]

AHB master #1

AHB master #2

AHB slave

DMA response

DMA request

Interrupt request

(to interrupt controller)

DMAC

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