HD643303x Hitachi, HD643303x Datasheet - Page 131

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

Example of Wait State Control Settings: A reset initializes ASTCR and WCER to H'FF and
WCR to H'F3, selecting programmable wait mode and three wait states for all areas. Software can
select other wait modes for individual areas by modifying the ASTCR, WCER, and WCR settings.
Figure 6-9 shows an example of wait mode settings.
Note: Wait states cannot be inserted in areas designated for two-state access by ASTCR.
Area 0
Area 1
Area 2
Area 3
Area 4
Area 5
Area 6
Area 7
programmable wait mode
programmable wait mode
no wait states inserted
no wait states inserted
no wait states inserted
no wait states inserted
3-state-access area,
3-state-access area,
3-state-access area,
3-state-access area,
2-state-access area,
2-state-access area,
2-state-access area,
2-state-access area,
pin wait mode 0
pin wait mode 0
Figure 6-9 Wait Mode Settings (Example)
ASTCR H'0F:
WCER H'33:
WCR H'F3:
Bit:
—
7
0
0
116
—
6
0
0
—
5
0
1
—
4
0
1
3
1
0
0
2
1
0
0
1
1
1
1
0
1
1
1