HD6432621 Hitachi, HD6432621 Datasheet - Page 196

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Table 7-3
ABWCR
ABWn
0
1
7.3.3
The H8S/2626 Series and H8S/2623 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.
152
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