Hitachi SH7032 - Page 231

196
0
None
None
(1) Channels
0 and 1
(6) Channel 0
(2) Channel 1
transfer starts
(3) Channel 1
transfer ends
(5) Channel 0
transfer ends
(7) Channel 0
transfer starts
(4) Channel 0
transfer starts
(8) Channel 0
transfer ends
Priority order
changes
3 > 2 > 1 > 0
3 > 2 > 0 > 1
3 > 2 > 1 > 0
3 > 2 > 1 > 0
Transfer request Waiting channel(s) DMAC operation Channel priority
Priority order
changes
Priority order
does not change
Waiting for
transfer request
Figure 9.5 Example of Changes in Priority in External-Pin Round-Robin Mode