HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 594

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Appendix B Internal I/O Registers
ABWCR—Bus Width Control Register
ASTCR—Access State Control Register
Rev.4.00 Aug. 20, 2007 Page 550 of 638
REJ09B0395-0400
Modes
1 and 3
Modes
2 and 4
Initial value
Read/Write
Initial value
Initial value
Read/Write
Bit
Bit
AST7
R/W
7
1
ABW7
R/W
7
1
0
Area 7 to 0 access state control
Bits 7 to 0
AST6
to AST0
Area 7 to 0 bus width control
R/W
AST7
6
1
Bits 7 to 0
to ABW0
ABW6
0
1
ABW7
R/W
6
1
0
0
1
AST5
R/W
5
1
Areas 7 to 0 are two-state access areas
Areas 7 to 0 are three-state access areas
ABW5
R/W
5
1
0
Areas 7 to 0 are 16-bit access areas
Areas 7 to 0 are 8-bit access areas
AST4
R/W
4
1
Number of States in Access Area
ABW4
R/W
4
1
0
AST3
R/W
H'EE020
H'EE021
3
1
Bus Width of Access Area
ABW3
R/W
3
1
0
AST2
R/W
2
1
ABW2
R/W
2
1
0
AST1
R/W
1
1
ABW1
R/W
1
1
0
AST0
R/W
Bus controller
Bus controller
0
1
ABW0
R/W
0
1
0