Fujitsu FR30 Computer Hardware User Manual


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4.16 Relationship between Data Bus Widths and Control Signals
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Byte Access
Bus width Big endian mode Little endian mode
16-bit bus
width
address:
'0'
D31 D31
AA WR0X CASL WEL
D16
AA
D00
1)
Control pinInternal register External pin
address: '0'
D31 D31
AA WR0X CASL WEL
D16
AA
D00
1)
Control pinInternal register External pin
address: '1'
D31 D31
BB WR1X CASH WEH
D16
BB
D00
1)
Control pin
Internal register External pin
address: '1'
D31
D31
BB WR1X CASH WEH
D16
BB
D00
1)
Control pinInternal register External pin
address: '2'
D31
D31
CC WR0XCASL WEL
D16
CC
D00
1)
Control pinInternal register External pin
address: '2'
D31 D31
CC WR0XCASL WEL
D16
CC
D00
1)
Control pin
Internal register External pin
address: '3'
D31 D31
DD WR1X CASH WEH
D16
DD
D00
1)
Control pin
Internal register External pin
address: '3'
D31 D31
DD WR1X CASH WEH
D16
DD
D00
1)
Control pin
Internal register External pin
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