HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 1134

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Appendix B Internal I/O Registers
ABWCR—Bus Width Control Register
ASTCR—Access State Control Register
Rev.6.00 Sep. 27, 2007 Page 1104 of 1268
REJ09B0220-0600
Bit
Modes 5 to 7
Initial value
R/W
Mode 4
Initial value
Read/Write
Bit
Initial value
Read/Write
:
:
:
:
:
:
:
:
ABW7
AST7
R/W
R/W
R/W
7
1
0
7
1
Area 7 to 0 Access State Control
ABW6
AST6
R/W
R/W
R/W
0
1
6
1
0
6
1
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
ABW5
AST5
R/W
R/W
R/W
5
1
0
5
1
ABW4
AST4
Area 7 to 0 Bus Width Control
R/W
R/W
R/W
0
1
4
1
0
4
1
H'FED0
H'FED1
Area n is designated for 16-bit access
Area n is designated for 8-bit access
ABW3
AST3
R/W
R/W
R/W
3
1
0
3
1
ABW2
AST2
R/W
R/W
R/W
2
1
0
2
1
ABW1
AST1
R/W
R/W
R/W
1
1
0
1
1
Bus Controller
Bus Controller
(n = 7 to 0)
(n = 7 to 0)
ABW0
AST0
R/W
R/W
R/W
0
1
0
0
1