R5F72115D160FPV datasheet(358/1228 Pages) RENESAS

358 / 1228 page

Section 9 Direct Memory Access Controller (DMAC)

Rev. 2.00 May. 08, 2008 Page 334 of 1200

REJ09B0344-0200

Channel 2 is given the lowest priority

among the round-robin channels. The

priority of channels 0 and 1, which were

higher than channel 2, is also shifted. If

there is a transfer request only to

channel 5 immediately after that, the

priority does not change because

channel 5 is not a round-robin channel.

Channel 1 is given the lowest priority

among the round-robin channels. The

priority of channel 0, which was higher

than channel 1, is also shifted.

Channel 0 is given the lowest priority

among the round-robin channels.

CH0 > CH1 > CH2 > CH3 > CH4 > CH5 > CH6 > CH7

CH1 > CH2 > CH3 > CH0 > CH4 > CH5 > CH6 > CH7

CH0 > CH1 > CH2 > CH3 > CH4 > CH5 > CH6 > CH7

CH2 > CH3 > CH0 > CH1 > CH4 > CH5 > CH6 > CH7

CH0 > CH1 > CH2 > CH3 > CH4 > CH5 > CH6 > CH7

CH3 > CH0 > CH1 > CH2 > CH4 > CH5 > CH6 > CH7

CH0 > CH1 > CH2 > CH3 > CH4 > CH5 > CH6 > CH7

CH3 > CH0 > CH1 > CH2 > CH4 > CH5 > CH6 > CH7

(1) When channel 0 transfers

Initial priority order

Priority order

after transfer

Priority order

after transfer

Priority order

after transfer

Priority order

after transfer

Post-transfer priority order

when there is an

immediate transfer

request to channel 5 only

(2) When channel 1 transfers

(3) When channel 2 transfers

(4) When channel 7 transfers

Priority order does not change.

Figure 9.3 Round-Robin Mode

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