CHAPTER 4 BUS CONTROL FUNCTION
User’s Manual U12688EJ4V0UM00
112
(b) When the data bus width is 8 bits
7
0
Word
data
7
0
15
8
External
data bus
4n
23
16
31
24
4n
Address
First
7
0
Word
data
7
0
15
8
External
data bus
4n + 1
23
16
31
24
Address
Second
<1> Access to address 4n
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 2
23
16
31
24
Address
Third
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 3
23
16
31
24
Address
Fourth
7
0
Word
data
7
0
15
8
External
data bus
4n + 1
23
16
31
24
4n
Address
First
7
0
Word
data
7
0
15
8
External
data bus
4n + 2
23
16
31
24
Address
Second
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 3
23
16
31
24
Address
Third
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 4
23
16
31
24
Address
Fourth
7
0
Word
data
7
0
15
8
External
data bus
4n + 2
23
16
31
24
4n
Address
First
7
0
Word
data
7
0
15
8
External
data bus
4n + 3
23
16
31
24
Address
Second
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 4
23
16
31
24
Address
Third
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 5
23
16
31
24
Address
Fourth
7
0
Word
data
7
0
15
8
External
data bus
4n + 3
23
16
31
24
4n
Address
First
7
0
Word
data
7
0
15
8
External
data bus
4n + 4
23
16
31
24
Address
Second
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 5
23
16
31
24
Address
Third
4n
7
0
Word
data
7
0
15
8
External
data bus
4n + 6
23
16
31
24
Address
Fourth
<2> Access to address 4n + 1
<4> Access to address 4n + 3
<3> Access to address 4n + 2
Remark
n = 0, 1, 2, 3, ···
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