HD6413008VF25 Datasheet, PDF (596/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

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