FUJITSU MB91460 SERIES FR60 - Manual (Page 394)

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Chapter 26 DMA Controller
5.Data Bus
Figure 5-2 Examples of Fly-By Transfer
memory
Memory read by RD or CSn
I/O write by RD or DACK
memory
Memory write by WR or CSn
I/O read by WR or DACK
D-bus
X-bus
I-bus
F-bus
Bus controller
DMAC
RAM
CPU
MB91460
I/O
I/O
I/O
D-bus
X-bus
I-bus
F-bus
Bus controller
DMAC
RAM
CPU
MB91460
I/O
Read cycle
Read cycle
Fly-by transfer (memory to I/O)
Fly-by transfer (I/O to memory)
External bus I/F
Data buffer
Data buffer