SH7785 Datasheet, PDF (720/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

14. Direct Memory Access Controller (DMAC)
Initial
Bit
Bit Name Value R/W Descriptions
11, 10 ⎯
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
9, 8
PR[1:0] 00
R/W Priority Mode 1, 0
Determine the priority between channels when there
are transfer requests for multiple channels
simultaneously.
00: CH0 > CH1 > CH2 > CH3 > CH4 > CH5 (DMAOR0)
CH6 > CH7 > CH8 > CH9 > CH10 > CH11
(DMAOR1)
01: CH0 > CH2 > CH3 > CH1 > CH4 > CH5 (DMAOR0)
CH6 > CH8 > CH9 > CH7 > CH10 > CH11
(DMAOR1)
10: Setting prohibited
11: Round-robin mode for CH0 to CH5 (DMAOR0)
Round-robin mode for CH6 to CH11 (DMAOR1)
When round-robin mode is specified, do not mix the
cycle steal mode and the burst mode in any channels
(channels 0 to 5) corresponding to DMAOR0. For any
channels corresponding to DMAOR1 (channels 6 to
11), only normal mode 2 in the cycle steal mode
(CHCR.LCKN = 1, CHCR.TB = 0) can be specified.
7 to 3 ⎯
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
Rev.1.00 Jan. 10, 2008 Page 690 of 1658
REJ09B0261-0100