HD64F3028F25 Datasheet, PDF (796/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

ABWCR—Bus Width Control Register
H'EE020
Bus controller
Bit
7
ABW7
Modes 1, 3, 5, 6, 7 Initial value
1
Modes 2, 4
Initial value
0
Read/Write R/W
6
ABW6
1
0
R/W
5
4
3
ABW5 ABW4 ABW3
1
1
1
0
0
0
R/W R/W R/W
2
ABW2
1
0
R/W
1
0
ABW1 ABW0
1
1
0
0
R/W R/W
Area 7 to 0 bus width control
Bits 7 to 0
ABW7
to ABW0
Bus Width of Access Area
0
Areas 7 to 0 are 16-bit access areas
1
Areas 7 to 0 are 8-bit access areas
ASTCR—Access State Control Register
H'EE021
Bus controller
Bit
Initial value
Read/Write
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
Bits 7 to 0
AST7
to AST0
Number of States in Access Area
0
Areas 7 to 0 are two-state access areas
1
Areas 7 to 0 are three-state access areas
Rev. 2.00, 09/03, page 764 of 890