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236
DMAC
DACK
DREQ
External
memory
External device
with DACK
This LSI
External address bus
: Data flow
External data bus
Figure 11.5 Data Flow in Single Address Mode
Two types of transfers are possible in the single address mode: (a) transfers between external
devices with DACK and memory-mapped external devices, and (b) transfers between external
devices with DACK and external memory. The only transfer requests for either of these is the
external request (
DREQ
). Figure 11.6 shows the DMA transfer timing for the single address mode.
Summary of Contents for SH7041 Series
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