HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 494

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

Two types of transfers are possible in single address mode: 1) transfers between external
devices with DACK and memory-mapped external devices; and 2) transfers between external
devices with DACK and external memory. For both of them, transfer must be requested by the
external request signal (DREQ). For the combination of the specifiable setting to perform data
transfer using an external request (DREQ), see table 11.9. Figure 11.7 shows the DMA transfer
timing for single address mode.
Chip
Figure 11.6 Data Flow in Single Address Mode
External address bus
DMAC
: Data flow
DACKn
DREQn
External data bus
External device
with DACK
External
memory
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