
CHAPTER 5 BUS CONTROL FUNCTION
User’s Manual U15905EJ2V1UD
185
(a) 16-bit data bus width (2/2)
<3> Access to address (4n + 2)
First access
Second access
7
0
7
0
15
8
4n + 2
15
8
4n + 3
23
16
31
24
7
0
7
0
15
8
4n + 4
15
8
4n + 5
23
16
31
24
Word data
External data
bus
Address
Word data
External data
bus
Address
<4> Access to address (4n + 3)
First access
Second access
Third access
7
0
7
0
15
8
15
8
4n + 3
23
16
31
24
7
0
7
0
15
8
4n + 4
15
8
4n + 5
23
16
31
24
7
0
7
0
15
8
4n + 6
15
8
23
16
31
24
Word data
External data
bus
Address
Word data
External data
bus
Address
Word data
External data
bus
Address