H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 882

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Appendix B Internal I/O Register
DRAMCR—DRAM Control Register
Rev. 3.00 Sep 15, 2006 page 848 of 988
REJ09B0330-0300
Bit
Initial value
Read/Write
:
:
:
Refresh Control
RFSHE
0
1
R/W
7
0
Refresh control is not performed
Refresh control is performed
RAS-CAS Wait
0
1
RCW
R/W
Wait state insertion in CAS-before-RAS refreshing disabled
RAS falls in T
One wait state inserted in CAS-before-RAS refreshing
RAS falls in T
6
0
Refresh Mode
0
1
RMODE
R/W
DRAM interface: CAS-before-RAS refreshing used
Self-refreshing used
5
0
Rr
Rc1
Compare Match Flag
cycle
cycle
0
1
CMF
[Clearing condition]
Cleared by reading the CMF flag when CMF = 1, then
writing 0 to the CMF flag
[Setting condition]
Set when RTCNT = RTCOR
R/W
4
0
Compare Match Interrupt Enable
0
1
H'FED7
CMIE
Interrupt request (CMI) by CMF flag disabled
Interrupt request (CMI) by CMF flag enabled
R/W
3
0
Refresh Counter Clock Select
0
1
CKS2
R/W
0
1
0
1
2
0
0
1
0
1
0
1
0
1
Count operation disabled
Count uses /2
Count uses /8
Count uses /32
Count uses /128
Count uses /512
Count uses /2048
Count uses /4096
CKS1
R/W
1
0
Bus Controller
CKS0
R/W
0
0