SH7261 datasheet(401/1348 Pages) RENESAS

401 / 1348 page

Section 11 Direct Memory Access Controller (DMAC)

Rev. 2.00 Sep. 07, 2007 Page 369 of 1312

REJ09B0320-0200

11.11

Rotate Function

When rotation is selected as the address "indexing" mode, the address is incremented. On

completion of single operand transfer, the value in a working source or working destination

address register for which rotation has been selected returns to the value of the source or

destination address register (DMCSADRn or DMCDADRn) for the corresponding channel.

Figure 11.14 is an example of transfer using the rotate function (source: rotation, destination:

incrementation).

Number of transfers in single operand transfer: 8 bytes

Current source address

setting value

Source data for transfer

8 data

(32 bytes)

Current destination

address setting value

Total data

transferred

Interrupt

request

DMA end

Number of bytes for transfer: 96 bytes

Data transfer

Operand transfer

Block 1

8 data

(32 bytes)

Block 2

8 data

(32 bytes)

Block 3

8 data

(32 bytes)

Data transferred

in single operand

transfer

Data transferred

in single operand

transfer

Data transferred

in single operand

transfer

Operand transfer

Figure 11.14 Example of Transfer Using the Rotate Function

(Source: Rotate, Destination: Increment)

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