MC68030 Datasheet, PDF (45/602 Pages) Motorola, Inc – ENHANCED 32-BIT MICROPROCESSOR

Data Organization and Addressing Capabilities
BIT DATA
7
07
07
07
0
BYTE n - 1
76543210
BYTE n + 1
BYTE n + 2
BASE ADDRESS BIT NUMBER
BIT FIELD DATA
BASE BIT
7
07
07
07
0
BYTE n - 1
BYTE n
0 1 2 3 ...........w - 1
OFFSET
...3-2-1 0 1 2...
BASE ADDRESS
OFFSET
WIDTH
BYTE INTEGER DATA
7
07
07
07
0
BYTE n - 1
MSB BYTE n LSB
BYTE n + 1
BYTE n + 2
7
07
BYTE n - 1
ADDRESS
WORD INTEGER DATA
07
07
07
0
WORD INTEGER
BYTE n + 2
BYTE n + 3
ADDRESS
7
07
BYTE n - 1
07
07
07
LONG-WORD INTEGER
07
0
BYTE n + 4
ADDRESS
ADDRESS
7
07
BYTE n - 1
QUAD-WORD DATA
07
07
07
QUAD WORD
07
0
BYTE n + 8
PACKED BINARY-CODED DATA
7
07
43
07
07
0
BYTE n - 1
MSD
LSD
BYTE n + 1
BYTE n + 2
ADDRESS
UNPACKED BINARY-CODED DATA
7
07
43
07
43
07
0
BYTE n - 1
XX
MSD
XX
LSD
BYTE n + 2
XX = USER DEFINED VALUE
ADDRESS
Figure 2-2. Memory Data Organization
MOTOROLA
MC68030 USER’S MANUAL
2-7