1072
DRAMCR—DRAM Control Register
H'FED7
Bus Controller
7
RFSHE
0
R/W
6
CBRM
0
R/W
5
RMODE
0
R/W
4
CMF
0
R/W
3
CMIE
0
R/W
0
CKS0
0
R/W
2
CKS2
0
R/W
1
CKS1
0
R/W
Refresh control
0
[Clearing]
Writing 0 to CMF flag after reading CMF=1.
[Setting]
When RTCNT=RTCOR.
1
CBR refresh mode
Do not perform self-refresh in software standby
mode.
Perform self-refresh in software standby mode.
0
1
External access enabled at CAS-before-RAS refresh.
External access disabled at CAS-before-RAS refresh.
0
1
Do not perform refresh control.
Perform refresh control.
0
1
Refresh mode
CMF flag interrupt request (CMI) disabled.
CMF flag interrupt request (CMI) enabled.
Counting on ø/8
Counting on ø/32
No counting operation
Counting on ø/2
0
1
Compare match flag
Refresh counter clock select
Compare match interrupt enable
0
1
0
CKS0
CKS1
CKS2
0
0
1
1
Counting on ø/2048
Counting on ø/4096
Counting on ø/128
Counting on ø/512
0
1
0
1
0
1
1
Bit
Initial value
R/W
:
:
:
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 ...