HD64F3028F25 Datasheet, PDF (165/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Table 6.3 Bus Specifications for Each Area (Basic Bus Interface)
ABWCR ASTCR WCRH/WCRL
ABWn ASTn Wn1 Wn0
0
0
—
—
1
0
0
1
1
0
1
1
0
—
—
1
0
0
1
1
0
1
Note: n = 7 to 0
Bus Specifications (Basic Bus Interface)
Bus Width Access States
Program Wait States
16
2
0
3
0
1
2
3
8
2
0
3
0
1
2
3
6.3.3 Memory Interfaces
The H8/3028 Group memory interfaces comprise a basic bus interface that allows direct
connection of ROM, SRAM, and so on; a DRAM interface that allows direct connection of
DRAM; and a burst ROM interface that allows direct connection of burst ROM. The interface can
be selected independently for each area.
An area for which the basic bus interface is designated functions as normal space, an area for
which the DRAM interface is designated functions as DRAM space, and area 0 for which the burst
ROM interface is designated functions as burst ROM space.
Rev. 2.00, 09/03, page 133 of 890