CHAPTER 4 BUS CONTROL FUNCTION
122
User’s Manual U14492EJ3V0UD
(b) When the data bus width is 8 bits (little endian) (1/2)
<1> Access to address (4n)
1st access
2nd access
3rd access
4th access
7
0
7
0
Word data
External
data bus
Address
15
8
4n
23
16
31
24
7
0
7
0
Word data
External
data bus
4n + 1
Address
15
8
23
16
31
24
7
0
7
0
Word data
External
data bus
4n + 2
Address
15
8
23
16
31
24
7
0
7
0
Word data
External
data bus
4n + 3
Address
15
8
23
16
31
24
<2> Access to address (4n + 1)
1st access
2nd access
3rd access
4th access
7
0
7
0
Word data
External
data bus
Address
15
8
4n + 1
23
16
31
24
7
0
7
0
Word data
External
data bus
4n + 2
Address
15
8
23
16
31
24
7
0
7
0
Word data
External
data bus
4n + 3
Address
15
8
23
16
31
24
7
0
7
0
Word data
External
data bus
4n + 4
Address
15
8
23
16
31
24
Содержание V850E/IA1 mPD703116
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