NEC V850E/MA1, User Manual

Page: 111 / 567

CHAPTER 4 BUS CONTROL FUNCTION
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User’s Manual U14359EJ4V0UM
(3) Word access (32 bits)
(a) When the bus width is 16 bits (little endian) (1/2)
<1> Access to address (4n)
1st access 2nd access
7
0
7
0
Word data
15
8
External
data bus
4n
Address
15
8
4n + 1
23
16
31
24
7
0
7
0
Word data
15
8
External
data bus
4n + 2
Address
15
8
4n + 3
23
16
31
24
<2> Access to address (4n + 1)
1st access 2nd access 3rd access
7
0
7
0
Word data
15
8
External
data bus
Address
15
8
4n + 1
23
16
31
24
7
0
7
0
Word data
15
8
External
data bus
4n + 2
Address
15
8
4n + 3
23
16
31
24
7
0
7
0
Word data
15
8
External
data bus
4n + 4
Address
15
8
23
16
31
24