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3.4
Data Configuration
The MB91319 uses the following two data ordering methods:
• Bit ordering
• Byte ordering
• Bit ordering
■ Bit Ordering
Use the little endian method for bit ordering.
bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MSB
■ Byte Ordering
Use the big endian method for byte ordering.
Memory
bit
7
Address n
10101010
Address (n+1)
11001100
Address (n+2)
11111111
Address (n+3)
00010001
CHAPTER 3 CPU AND CONTROL UNITS
MSB
bit 31
23
10101010 11001100 11111111 00010001
0
LSB
15
7
0
LSB
43
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