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ABWCR—Bus Width Control Register
Bit
:
Mode 5 to 7
:
Initial value
:
R/W
:
Mode 4
Initial value
:
R/W
:
ASTCR—Access State Control Register
Bit
:
AST7
Initial value
:
R/W
:
Area 7 to 0 access state control
1066
7
6
ABW7
ABW6
1
1
R/W
R/W
0
0
R/W
R/W
Area 7 to 0 bus width control
0
1
7
6
AST6
1
1
R/W
R/W
0
Area n set as 2-state access area.
Insertion of wait states in area n external area access is disabled.
1
External area access of area n set as 3-state access area.
Insertion of wait states in area n external area access is enabled.
5
4
ABW5
ABW4
1
1
R/W
R/W
0
0
R/W
R/W
Sets area n to 16-bit access.
Sets area n to 8-bit access.
5
4
AST5
AST4
1
1
R/W
R/W
H'FED0
3
2
ABW3
ABW2
1
1
R/W
R/W
0
0
R/W
R/W
(n= 7 to 0)
H'FED1
3
2
AST3
AST2
1
1
R/W
R/W
(n= 7 to 0)
Bus Controller
1
0
ABW1
ABW0
1
1
R/W
R/W
0
0
R/W
R/W
Bus Controller
1
0
AST1
AST0
1
1
R/W
R/W
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