HD6432646 Hitachi, HD6432646 Datasheet - Page 1037

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

ABWCR—Bus Width Control Register
ASTCR—Access State Control Register
Modes 5 to 7
Mode 4
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
Initial value
Read/Write
Area 7 to 0 Access State Control
AST7
0
1
ABW7
Area 7 to 0 Bus Width Control
R/W
R/W
R/W
0
1
7
1
7
1
0
Area n is designated for 2-state access
Wait state insertion in area n external space is disabled
Area n is designated for 3-state access
Wait state insertion in area n external space is enabled
Area n is designated for 16-bit access
Area n is designated for 8-bit access
AST6
ABW6
R/W
R/W
R/W
6
1
6
1
0
AST5
ABW5
R/W
R/W
R/W
5
1
5
1
0
AST4
ABW4
R/W
R/W
R/W
4
1
4
1
0
(n = 7 to 0)
H'FED0
H'FED1
AST3
ABW3
R/W
R/W
R/W
3
1
3
1
0
(n = 7 to 0)
AST2
ABW2
R/W
R/W
R/W
2
1
2
1
0
AST1
ABW1
R/W
R/W
R/W
1
1
1
1
0
Bus Controller
Bus Controller
AST0
ABW0
R/W
R/W
R/W
0
1
0
1
0
1003