HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 1140

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Appendix B Internal I/O Registers
DRAMCR—DRAM Control Register
Rev.6.00 Sep. 27, 2007 Page 1110 of 1268
REJ09B0220-0600
Bit
Initial value
Read/Write
:
:
:
(Not supported in H8S/2321)
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
Self-refreshing is not performed in software standby mode
Self-refreshing is performed in software standby mode
5
0
r
c1
cycle
Compare Match Flag
cycle
0
1
[Clearing condition]
When 0 is written to CMF after reading CMF = 1
[Setting condition]
When RTCNT = RTCOR
CMF
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 φ /2
Count uses φ /8
Count uses φ /32
Count uses φ /128
Count uses φ /512
Count uses φ /2048
Count uses φ /4096
CKS1
R/W
1
0
Bus Controller
CKS0
R/W
0
0