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CHAPTER 4 External Bus Interface
4.6.4 Comparison between Big Endian and Little Endian for
External Access
Comparison between big endian and little endian of external access for word access,
half-word access, and byte access to the bus width is described.
■ Word Access
Big endian mode Little endian mode
16-bit bus
width
8-bit bus
width
Control pinInternal Reg External pin
address:
"0" "1"
D00
D31D31
AA
CC
BB
DD
WR0
WR1
AA CC
BB DD
D16
"0" "1"
D00
D31D31
AA
CC
BB
DD
DD BB
CC AA
D16
D16
WR0
WR1
Control pinInternal Reg External pin
address:
"0" "1" "2" "3"
D00
D31D31
AA
CC
BB
DD
AA CCBB DD
D24
D24
WR0
Control pinInternal Reg External pin
address:
"0" "1" "2" "3"
D00
D31D31
AA
CC
BB
DD
DD BBCC AA
D24
D24
WR0
Control pinInternal Reg External pin
address: