MC68HC000RC12 Datasheet, PDF (21/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor, Inc.
BIT DATA
1 BYTE = 8 BITS
76 543210
INTEGER DATA
1 BYTE = 8 BITS
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MSB
BYTE 0
LSB
BYTE 1
BYTE 2
BYTE 3
1 WORD = 16 BITS
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MSB
WORD 0
LSB
WORD 1
WORD 2
EVEN BYTE
ODD BYTE
76
54 3 2 1 0 7 6
54 3 2
1 LONG WORD = 32 BITS
15 14 13 12 11 10 9 8 7 6 5 4 3 2
MSB
LONG WORD 0
HIGH ORDER
LOW ORDER
10
10
LSB
LONG WORD 1
LONG WORD 2
ADDRESSES
1 ADDRESS = 32 BITS
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MSB
HIGH ORDER
ADDRESS 0
LOW ORDER
LSB
ADDRESS 1
ADDRESS 2
MSB = MOST SIGNIFICANT BIT
LSB = LEAST SIGNIFICANT BIT
DECIMAL DATA
2 BINARY-CODED-DECIMAL DIGITS = 1 BYTE
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MSD
BCD 0
BCD 1 _LSD
BCD 2
BCD 3
BCD 4
BCD 5
BCD 6
BCD 7
MSD = MOST SIGNIFICANT DIGIT
LSD = LEAST SIGNIFICANT DIGIT
Figure 2-6. Data Organization in Memory
MOTOROLA
M68000 8-/16-/32-BIT MICROPROCESSOR USER’S MANUAL
2-7
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