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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 AACC WR0XCASL WEL
BB BBDD WR1XCASH 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 pinInternal 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 pinInternal register External pin