CHAPTER 5 BUS CONTROL FUNCTION
Preliminary User’s Manual U15905EJ1V0UD
190
(b) 8-bit data bus width (1/2)
<1> Access to address (4n)
First access
Second access
Third access
Fourth access
7
0
7
0
15
8
4n
23
16
31
24
7
0
7
0
4n + 1
15
8
23
16
31
24
7
0
7
0
4n + 2
15
8
23
16
31
24
7
0
7
0
4n + 3
15
8
23
16
31
24
Word data
External data
bus
Address
Word data
External data
bus
Address
Word data
External data
bus
Address
Word data
External data
bus
Address
<2> Access to address (4n + 1)
First access
Second access
Third access
Fourth access
7
0
7
0
15
8
4n + 1
23
16
31
24
7
0
7
0
4n + 2
15
8
23
16
31
24
7
0
7
0
4n + 3
15
8
23
16
31
24
7
0
7
0
4n + 4
15
8
23
16
31
24
Word data
External data
bus
Address
Word data
External data
bus
Address
Word data
External data
bus
Address
Word data
External data
bus
Address
Summary of Contents for V850ES/SA2 UPD703201
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