HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 824

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

ABWCR—Bus Width Control Register
ASTCR—Access State Control Register
Bit
Initial
value
Read/Write
Bit
Initial value
Read/Write
Mode 1, 3, 5, 6
Mode 2, 4, 7
Area 7 to 0 access state control
Area 7 to 0 bus width control
AST7
AST7 to AST0
R/W
ABW7
ABW7 to ABW0
7
1
R/W
Bits 7 to 0
7
1
0
Bits 7 to 0
0
1
0
1
AST6
R/W
ABW6
6
1
R/W
6
1
0
Number of States in Access Cycle
Areas 7 to 0 are two-state access areas
Areas 7 to 0 are three-state access areas
AST5
R/W
Bus Width of Access Area
Areas 7 to 0 are 16-bit access areas
Areas 7 to 0 are 8-bit access areas
ABW5
5
1
R/W
5
1
0
817
AST4
R/W
ABW4
4
1
R/W
4
1
0
AST3
R/W
ABW3
3
1
R/W
3
1
0
H'EC
H'ED
AST2
R/W
ABW2
2
1
R/W
2
1
0
AST1
R/W
ABW1
1
1
R/W
Bus controller
Bus controller
1
1
0
AST0
R/W
ABW0
0
1
R/W
0
1
0