SH7203 Datasheet, PDF (469/1686 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 10 Direct Memory Access Controller (DMAC)
10.5.4 Notice about using on-chip peripheral module request mode or auto-request mode
In case that one or more channels are set that transfer request source is on-chip peripheral module
request or auto-request mode and use DACKn pin or TENDn pin, please use one of the following
four ways.
1) Please set all channels to cycle-steal mode.
2) Please set all channels to burst-mode with all of the following three conditions.
2-1) Please set channel priority mode to fixed mode 1 or fixed mode 2.
2-2) Please set all channels to dual-address mode.
2-3) Please set transfer source address and transfer destination address of each channels to one
of the followings.
A. transfer source address: external address space
transfer destination address: external address space
B. transfer source address: external address space
transfer destination address: internal address space
C. transfer source address: internal address space
transfer destination address internal address space
3) If there are both of one or more channels set to cycle-steal mode and one or more channels set
to burst mode, please use with all of the following three conditions.
3-1) Please set channel priority mode to fixed mode 1 or fixed mode 2.
3-2) Please set all channels to dual-address mode.
3-3) Please set transfer source address and transfer destination address of each channels to one
of the followings.
A. transfer source address: external address space
transfer destination address: external address space
B. transfer source address: external address space
transfer destination address: internal address space
C. transfer source address: internal address space
transfer destination address: internal address space
4) Please use only one channel.
If using other than the above four ways, there is a possibility that DACKn pin and TENDn pin
show wrong transfer channel.
Rev. 2.00 Apr. 16, 2008 Page 439 of 1652
REJ09B0313-0200