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Word access – FUJITSU MB91460 SERIES FR60 User Manual

Page 571

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Chapter 31 External Bus

4.Endian and Bus Access

Word Access

Big endian mode

Little endian mode

32-bit bus
width

16-bit bus
width

8-bit bus
width

(1)

D00

D31

AA

CC

BB

DD

WR0

WR1

WR3

WR2

D00

D31

AA

CC

BB

DD

address: Lower 2-bit: "0"

Internal External Control
Reg terminal terminal

(1)

D00

D31

AA

CC

BB

DD

WR0

WR1

WR3

WR2

D00

D31

DD

BB

CC

AA

address : "0"

Internal External Control
Reg terminal terminal

address: "0" "2"

D00

D31

D31

AA

CC

BB

DD

WR0

WR1

AA

CC

BB

DD

Internal External Control
Reg terminal terminal

(1) (2)

D16

AA

CC

BB

DD

WR0

WR1

DD BB

CC AA

D16

address: "0" "2"

Internal External Control
Reg terminal terminal

D00

D31

D31

D16

(1) (2)

"0" "1" "2" "3"

AA

AA BB CC DD

CC

BB

DD

WR0

(1) (2) (3) (4)

address:

Internal External Control
Reg terminal terminal

D00

D31

D31

D24

AA

AA

DD CC BB

CC

BB

DD

WR0

"0" "1" "2" "3"

(1) (2) (3) (4)

address:

Internal External Control
Reg terminal terminal

D00

D31

D31

D24