121
Chapter 4
Bus Control Function
Preliminary User’s Manual U15839EE1V0UM00
(2)
Halfword access (16 bits)
(a) When the bus width is 16 bits (Little Endian)
<1> Access to even address (2n) <2> Access to odd address (2n + 1)
(b) When the data bus width is 8 bits (Little Endian)
<1> Access to even address (2n) <2> Access to odd address (2n + 1)
1-st Access
2-nd Access
7
0
7
0
Halfword
data
15
8
15
8
External
data bus
2n + 1
Address
7
0
7
0
Halfword
data
15
8
15
8
External
data bus
2n + 2
Address
7
0
7
0
Halfword
data
15
8
External
data bus
2n
Address
15
8
2n + 1
7
0
7
0
Halfword
data
15
8
External
data bus
Address
7
0
7
0
Halfword
data
15
8
External
data bus
2n + 1
Address
2n
1-st Access
2-nd Access
1-st Access
2-nd Access
7
0
7
0
Halfword
data
15
8
External
data bus
Address
7
0
7
0
Halfword
data
15
8
External
data bus
2n + 2
Address
2n + 1
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