Motorola M68000 - Page 21

MOTOROLA M68000 8-/16-/32-BIT MICROPROCESSOR USER’S MANUAL 2-7
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MSB
BYTE 0
BYTE 2
BYTE 1
BYTE 3
LSB
INTEGER DATA
1 BYTE = 8 BITS
1 WORD = 16 BITS
BIT DATA
1 BYTE = 8 BITS
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WORD 0
WORD 1
WORD 2
LSBMSB
EVEN BYTE ODD BYTE
1 LONG WORD = 32 BITS
LONG WORD 0
LONG WORD 1
LONG WORD 2
LOW ORDER
HIGH ORDER
LSB
MSB
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76 54321 0
76 54321 0
ADDRESS 1
ADDRESS 2
LOW ORDER
HIGH ORDER
LSB
MSB
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ADDRESSES
1 ADDRESS = 32 BITS
MSB = MOST SIGNIFICANT BIT
LSB = LEAST SIGNIFICANT BIT
ADDRESS 0
DECIMAL DATA
2 BINARY-CODED-DECIMAL DIGITS = 1 BYTE
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MSD
BCD 0
BCD 4
BCD 1
BCD 5
BCD 2
BCD 6
BCD 3
BCD 7
MSD = MOST SIGNIFICANT DIGIT
LSD = LEAST SIGNIFICANT DIGIT
LSD
Figure 2-6. Data Organization in Memory
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cale Semiconductor,
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