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15
14
MSB
15
14
MSB
7
6
15
14
MSB
15
14
MSB
MSB = MOST SIGNIFICANT BIT
LSB = LEAST SIGNIFICANT BIT
15
14
MSD
BCD 0
BCD 4
MSD = MOST SIGNIFICANT DIGIT
LSD = LEAST SIGNIFICANT DIGIT
MOTOROLA
M68000 8-/16-/32-BIT MICROPROCESSOR USER'S MANUAL
Freescale Semiconductor, Inc.
BIT DATA
1 BYTE = 8 BITS
7
6
5
INTEGER DATA
1 BYTE = 8 BITS
13
12
11
10
9
BYTE 0
BYTE 2
1 WORD = 16 BITS
13
12
11
10
9
EVEN BYTE
5
4
3
2
1
1 LONG WORD = 32 BITS
13
12
11
10
9
HIGH ORDER
LONG WORD 0
LOW ORDER
LONG WORD 1
LONG WORD 2
ADDRESSES
1 ADDRESS = 32 BITS
13
12
11
10
9
HIGH ORDER
ADDRESS 0
LOW ORDER
ADDRESS 1
ADDRESS 2
DECIMAL DATA
2 BINARY-CODED-DECIMAL DIGITS = 1 BYTE
13
12
11
10
9
BCD 1
LSD
BCD 5
Figure 2-6. Data Organization in Memory
For More Information On This Product,
Go to: www.freescale.com
4
3
2
1
0
8
7
6
5
4
3
BYTE 1
LSB
BYTE 3
8
7
6
5
4
3
WORD 0
WORD 1
WORD 2
ODD BYTE
0
7
6
5
4
3
8
7
6
5
4
3
8
7
6
5
4
3
8
7
6
5
4
3
BCD 2
BCD 6
2
1
0
2
1
0
LSB
2
1
0
2
1
0
LSB
2
1
0
LSB
2
1
0
BCD 3
BCD 7
2-7
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