HD6433044 Datasheet, PDF (824/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

ABWCR—Bus Width Control Register
H'EC
Bus controller
Bit
7
ABW7
Initial ^{Mode 1,3,5,6 1}
value _{Mode 2,4,7 0}
Read/Write
R/W
6
ABW6
1
0
R/W
5
ABW5
1
0
R/W
4
ABW4
1
0
R/W
3
ABW3
1
0
R/W
2
ABW2
1
0
R/W
1
ABW1
1
0
R/W
0
ABW0
1
0
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'ED
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 Cycle
0
Areas 7 to 0 are two-state access areas
1
Areas 7 to 0 are three-state access areas
817