Datasheet

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.