Motorola MPC823e - Page 357

Endian Modes
14-4 MPC823e REFERENCE MANUAL MOTOROLA
ENDIAN MODES
14
Table 14-4. Little-Endian Program/Data Path Between the
Register and 16-Bit Memory
FETCH/
LOAD
STORE
TYPE
LITTLE-
ENDIAN
ADDRESS
U-BUS
AND
CACHES
ADDRESS
EXTERNAL
BUS
ADDRESS
DATA IN THE
REGISTER
U-BUS AND
CACHES FORMAT
E-BUS FORMAT LITTLE-ENDIAN
PROGRAM/DATA
0123012301233210
Word 0 0 0 11 12 13 14 11 12 13 14 14 13 13 14
2 1211 1112
Half-word 0 2 0 21 22 21 22 22 21 21 22
Half-word 2 0 2 31 32 31 32 32 31 31 32
Byte 0 3 0 ‘a’ ‘a’ ‘a’ ‘a’
Byte 1 2 1 ‘b’ ‘b’ ‘b’ ‘b’
Byte 2 1 2 ‘c’ ‘c’ ‘c’ ‘c’
Byte 3 0 3 ‘d’ ‘d’ ‘d’ ‘d’
Table 14-5. Little-Endian Program/Data Path Between the
Register and 8-Bit Memory
FETCH/
LOAD
STORE
TYPE
LITTLE-
ENDIAN
ADDRESS
U-BUS
AND
CACHES
ADDRESS
EXTERNAL
BUS
ADDRESS
DATA IN THE
REGISTER
U-BUS AND
CACHES FORMAT
E-BUS FORMAT LITTLE-ENDIAN
PROGRAM/DATA
0123012301233210
Word 0 0 0 11 12 13 14 11 12 13 14 14 14
11313
21212
31111
Half-word 0 2 0 21 22 21 22 22 22
12121
Half-word 2 0 2 31 32 31 32 32 32
33131
Byte 0 3 0 ‘a’ ‘a’ ‘a’ ‘a’
Byte 1 2 1 ‘b’ ‘b’ ‘b’ ‘b’
Byte 2 1 2 ‘c’ ‘c’ ‘c’ ‘c’
Byte 3 0 3 ‘d’ ‘d’ ‘d’ ‘d’