156
Table 7-3
Bus Specifications for Each Area (Basic Bus Interface)
ABWCR
ASTCR
WCRH, WCRL
Bus Specifications (Basic Bus Interface)
ABWn
ASTn
Wn1
Wn0
Bus Width
Access States
Program Wait
States
0
0
—
—
16
2
0
1
0
0
3
0
1
1
1
0
2
1
3
1
0
—
—
8
2
0
1
0
0
3
0
1
1
1
0
2
1
3
7.3.3
Memory Interfaces
The H8S/2633 Series memory interfaces comprise a basic bus interface that allows direct
connection or ROM, SRAM, and so on, DRAM interface with direct DRAM connection 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 areas set for
DRAM interface are DRAM spaces an area for which the burst ROM interface is designated
functions as burst ROM space.
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...