SH7052 datasheet(582/919 Pages) RENESAS

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SH7052 Datasheet(PDF) 582 Page - Renesas Technology Corp

Part #	SH7052

Description	SuperHTM RISC engine

PDF	919 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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582 / 919 page

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15.3.8

DMAC Interface

The DMAC can be activated by reception of a message in HCAN’s mailbox 0. When DMAC

transfer ends after DMAC activation has been set, the RXPR0 and RFPR0 flags are acknowledge

signal automatically. An interrupt request due to a receive interrupt from the HCAN cannot be sent

to the CPU in this case. Figure 15.13 shows a DMAC transfer flowchart.

End of DMAC transfer?

End

DMAC initialization

• Activation source setting

• Source/destination address settings

• Transfer count setting

• Interrupt setting

Message reception in HCAN’s

mailbox 0

DMAC activation

DMAC transfer end bit setting

RXPR and RFPR clearing

DMAC interrupt enabled?

Interrupt to CPU

Clear DMAC interrupt flag

Yes

: Settings by user

: Processing by hardware

Figure 15.13 DMAC Transfer Flowchart

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