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Table 7-3
Bus Specifications for Each Area (Basic Bus Interface)
ABWCR
ASTCR
ABWn
ASTn
0
0
1
1
0
1
7.3.3
Memory Interfaces
The H8S/2646 Series memory interfaces comprise a basic bus interface that allows direct
connection or ROM, SRAM, and so on, and a burst ROM interface that allows direct connection
of burst ROM. The memory interface can be selected independently for each area.
An area for which the basic bus interface is designated functions as normal space, and an area for
which the burst ROM interface is designated functions as burst ROM space.
156
WCRH, WCRL
Wn1
Wn0
—
—
0
0
1
1
0
1
—
—
0
0
1
1
0
1
Bus Specifications (Basic Bus Interface)
Bus Width
Access States
16
2
3
8
2
3
Program Wait
States
0
0
1
2
3
0
0
1
2
3
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