beautypg.com

Fly-by transfer mode, Figure 6-3 – FUJITSU MB91460 SERIES FR60 User Manual

Page 397

background image

381

Chapter 26 DMA Controller

6.DMA External Interface

Figure 6-3 Timing Chart in 2-Cycle Transfer Mode

Fly-by transfer mode

Figure 6-4

"Timing Chart in Fly-By Transfer Mode" shows the timing chart in fly-by transfer mode.

Figure 6-4 Timing Chart in Fly-By Transfer Mode

RD

DQMU/L

WR/WRn

DACK (AKxx=111

B

)

*

Same timing as the chip select

DACK (AKxx=001

B

)

*

2-cycle transfer setting disabled

DACK (AKxx=100

B

)

*

DACK (AKxx=101

B

)

*

* : AKxx is the setting value in the PFR register that corresponds to the DMA channel.

DACK (AKxx=010

B

)

*

DACK (AKxx=011

B

)

*

DACK (AKxx=110

B

)

*

RD

DQMU/L

WR/WRn

IORD

IOWR

DACK (AKxx=111

B

)

*

Same timing as the chip select

DACK (AKxx=001

B

)

*

DACK (AKxx=010

B

)

*

Fly-by transfer setting disabled

DACK (AKxx=011

B

)

*

Fly-by transfer setting disabled

DACK (AKxx=100

B

)

*

Fly-by transfer setting disabled

Memory to I/O I/O to memory

Memory to I/O

I/O to memory

* : AKxx is the setting value in the PFR register that corresponds to the DMA channel.

DACK (AKxx=101

B

)

*

Fly-by transfer setting disabled

DACK (AKxx=110

B

)

*

Fly-by transfer setting disabled