
CHAPTER 5 BUS CONTROL FUNCTION
User’s Manual U15905EJ2V1UD
184
(3) Word access (32 bits)
(a) 16-bit data bus width (1/2)
<1> Access to address (4n)
First access
Second access
7
0
7
0
15
8
4n
15
8
4n + 1
23
16
31
24
7
0
7
0
15
8
4n + 2
15
8
4n + 3
23
16
31
24
Word data
External data
bus
Address
Word data
External data
bus
Address
<2> Access to address (4n + 1)
First access
Second access
Third access
7
0
7
0
15
8
15
8
4n + 1
23
16
31
24
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
23
16
31
24
Word data External data
bus
Address
Word data External data
bus
Address
Word data External data
bus
Address