FUJITSU MB91F109 FR30 - Manual (Page 175)

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4.16 Relationship between Data Bus Widths and Control Signals
4.16.3 External Access
This section lists several external accesses.
■ Word Access
Bus width Big endian mode Little endian mode
16-bit bus
width
8-bit bus
width
Control pin
address: '0' '2'
D31 D31
AA AA CC WR0X CASL WEL
BB BB DD WR1X CASH WEH
D16
CC
DD
D00
1) 2)
Internal register External pin
address: 0 2
D31 D31
AA DD BB WR0X CASL WEL
BB CC AA WR1X CASH WEH
D16
CC
DD
D00
1) 2)
Control pin Internal register External pin
address: 0 1 2 3
D31 D31
AA AA BB CC DD WR0X CAS WE
D24
BB
CC
DD
D00
1) 2) 3) 4)
Control pin Internal register External pin
address: 0 1 2 3
D31 D31
AA DD CC BB AA WR0X CAS WE
D24
BB
CC
DD
D00
1) 2) 3) 4)
Control pin Internal register External pin