HD6432633 Datasheet, PDF (1315/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

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