HD643303x Hitachi, HD643303x Datasheet - Page 541

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

ASTCR—Access State Control Register
WCR—Wait Control Register
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
Wait mode select 1 and 0
WMS1
Bit 3
0
1
WMS0
Bit 2
0
1
0
1
Area 7 to 0 access state control
Wait Mode
Programmable wait mode
No wait states inserted by
wait-state controller
Pin wait mode
Pin auto-wait mode
AST7
AST7 to AST0
R/W
—
—
7
1
7
1
Bits 7 to 0
0
1
AST6
R/W
—
—
6
1
6
1
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
—
—
5
1
5
1
526
AST4
R/W
—
—
4
1
4
1
Wait count 1 and 0
WC1
Bit 1
0
1
WMS1
AST3
R/W
R/W
3
0
3
1
WC0
Bit 0
0
1
0
1
H'ED
H'EE
WMS0
AST2
R/W
Number of Wait States
No wait states inserted by
wait-state controller
1 state inserted
2 states inserted
3 states inserted
R/W
2
0
2
1
AST1
WC1
R/W
R/W
1
1
1
1
Bus controller
Bus controller
AST0
WC0
R/W
R/W
0
1
0
1