HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 693

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

ABWCR—Bus Width Control Register
ASTCR—Access State Control Register
Bit
Modes 1, 2, 3, 5, 6, 7
Initial value
Read/Write
Mode 4
Initial value
Read/Write
Bit
Initial value
Read/Write
:
:
:
:
:
:
:
:
AST7
ABW7
R/W
R/W
R/W
7
1
7
1
0
Note: n = 7 to 0
Area 7 to 0 Access State Control
AST6
R/W
ABW6
0
1
R/W
R/W
6
1
6
1
0
Area n is designated for 2-state access
Wait state insertion in area n external space is disabled.
Area n is designated for 3-state access
Wait state insertion in area n external space is enabled
AST5
R/W
ABW5
R/W
R/W
5
1
5
1
0
AST4
R/W
ABW4
Note: n = 7 to 0
Area 7 to 0 Bus Width Control
R/W
R/W
4
1
0
1
4
1
0
H'FED1
H'FED0
Area n is designated for 16-bit access
Area n is designated for 8-bit access
Rev.3.00 Mar. 26, 2007 Page 651 of 772
AST3
R/W
ABW3
R/W
R/W
3
1
3
1
0
AST2
R/W
ABW2
R/W
R/W
2
1
Appendix B Register Field
2
1
0
AST1
R/W
ABW1
REJ09B0355-0300
R/W
R/W
1
1
1
1
0
Bus Controller
Bus Controller
AST0
R/W
ABW0
R/W
R/W
0
1
0
1
0