HD6432646 Hitachi, HD6432646 Datasheet - Page 190
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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Table 7-3
ABWCR
ABWn
0
1
7.3.3
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
Memory Interfaces
ASTCR
ASTn
0
1
0
1
Bus Specifications for Each Area (Basic Bus Interface)
Wn1
—
0
1
—
0
1
WCRH, WCRL
Wn0
—
0
1
0
1
—
0
1
0
1
Bus Width
16
8
Bus Specifications (Basic Bus Interface)
Access States
2
3
2
3
Program Wait
States
0
0
1
2
3
0
0
1
2
3
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