143
Bit 4—Burst Cycle Select 1 (BRSTS1): Selects the number of burst cycles for the burst ROM
interface.
Bit 4
BRSTS1
Description
0
Burst cycle comprises 1 state
1
Burst cycle comprises 2 states
(Initial value)
Bit 3—Burst Cycle Select 0 (BRSTS0): Selects the number of words that can be accessed in a
burst ROM interface burst access.
Bit 3
BRSTS0
Description
0
Max. 4 words in burst access
(Initial value)
1
Max. 8 words in burst access
Bits 2 to 0—RAM Type Select (RMTS2 to RMTS0): In advanced mode, these bits select the
memory interface for areas 2 to 5.
When DRAM space is selected, the appropriate area becomes the DRAM interface.
Bit 2
Bit 1
Bit 0
Description
RMTS2
RMTS1
RMTS0
Area 5
Area 4
Area 3
Area 2
0
0
0
Normal space
1
Normal space
DRAM space
1
0
Normal space
DRAM space
1
DRAM space
1
1
1
Contiguous DRAM space
Note: When all areas selected in DRAM are 8-bit space, the PF2 pin can be used as an I/O port
and for
BREQO
and
WAIT
. When contiguous RAM is selected set the appropriate bus width
and number of access states (the number of programmable waits) to the same values for all
of areas 2 to 5. Do not set other than the above combinations.
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 ...