NEC UPD703116 User Manual page 110

(3) Word access (32 bits)
(a) When the data bus width is 16 bits (little endian) (1/2)
<1> Access to address (4n)
1st access
31
24
23
16
15 15
8 8
7 7
0 0
Word data External
data bus
<2> Access to address (4n + 1)
1st access
31
24
23
16
15 15
8 8
7 7
0 0
Word data External
data bus
110
CHAPTER 4 BUS CONTROL FUNCTION
2nd access
31
24
23
Address
16
15
4n + 1
8
7
4n
0
Word data
2nd access
31
24
23
Address
16
15
4n + 1
8
7
0
Word data
User's Manual U14492EJ5V0UD
Address
15
4n + 3
8
7
4n + 2
0
External
data bus
31
24
23
Address
16
15 15
4n + 3
8 8
7 7
4n + 2
0 0
External Word data
data bus
3rd access
Address
15
8
7
4n + 4
0
External
data bus