HD6473032F16 Datasheet, PDF (166/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 6 Bus Controller
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 6.16 shows an example of wait mode settings.
Area 0
Area 1
Area 2
3-state-access area,
programmable wait mode
(3 states inserted)
3-state-access area,
programmable wait mode
(3 states inserted)
3-state-access area,
pin wait mode 0
Area 3
3-state-access area,
pin wait mode 0
Area 4
2-state-access area,
no wait states inserted
Area 5
2-state-access area,
no wait states inserted
Area 6
2-state-access area,
no wait states inserted
Area 7
2-state-access area,
no wait states inserted
Bit: 7 6 5 4 3 2 1 0
ASTCR H'0F: 0 0 0 0 1 1 1 1
WCER H'33: 0 0 1 1 0 0 1 1
WCR H'F3: — — — — 0 0 1 1
Note: Wait states cannot be inserted in areas designated for two-state access by ASTCR.
Figure 6.16 Wait Mode Settings (Example)
Rev. 3.00 Mar 21, 2006 page 136 of 814
REJ09B0302-0300