Renesas SH7709S Manuel D’Utilisation

Rev. 5.00, 09/03, page 346 of 760

Normal end

AE = 1 or

NMIF = 1 or

DE = 0 or 
DME = 0?

Bus mode,

transfer request mode,

DREQ detection selection

system

Initial settings

(SAR, DAR, DMATCR, CHCR, DMAOR)

Transfer (1 transfer unit);

DMATCR 

−

 1 

→ DMATCR, 

SAR and DAR updated

DEI interrupt request (when IE = 1)

No

Yes

No

Yes

No

Yes

Yes

No

Yes

No

*

3

*

2 

Start

Transfer aborted

DMATCR = 0?

Transfer request?

*

1

DE, DME = 1 and

AE, NMIF, TE = 0?

Does

AE = 1 or

NMIF = 1 or

DE = 0 or DME

= 0?

Transfer end

Notes: 1. 

In auto-request mode, transfer begins when AE, NMIF, and TE are both 0 and the DE and 
DME bits are set to 1.

 2. 

DREQ = level detection in burst mode (external request) or cycle-steal mode.

 3. 

DREQ = edge detection in burst mode (external request), or auto-request mode in burst mode.