- 您现在的位置：买卖IC网 > PDF目录381697 > DDRSDRAM (SAMSUNG SEMICONDUCTOR CO. LTD.) DDR SDRAM Specification Version 0.61 PDF资料下载
参数资料
| 型号： | DDRSDRAM |
| 厂商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | DDR SDRAM Specification Version 0.61 |
| 中文描述： | DDR SDRAM的规格版本0.61 |
| 文件页数： | 17/49页 |
| 文件大小： | 750K |
| 代理商： | DDRSDRAM |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页
- 17 of 63 -
REV. 0.61 August 9. '99
128Mb DDR SDRAM
Target
3.2.2.2 Extended Mode Register Set(EMRS)
The extended mode register stores the data for enabling or disabling DLL, QFC and selecting output driver
size. The default value of the extended mode register is not defined, therefore the extened mode register must
be written after power up for enabling or disabling DLL. The extended mode register is written by asserting low
on CS, RAS, CAS, WE and high on BA0(The DDR SDRAM should be in all bank precharge with CKE already
high prior to writing into the extended mode register). The state of address pins A0 ~ A11 and BA1 in the
same cycle as CS, RAS, CAS and WE going low are written in the extended mode register. Two clock cycles
are required to complete the write operation in the extended mode register. The mode register contents can
be changed using the same command and clock cycle requirements during operation as long as all banks are
in the idle state. A0 is used for DLL enable or disable. "High" on BA0 is used for EMRS. All the other address
pins except A0 and BA0 must be set to low for proper EMRS operation. Refer to the table for specific codes.
Address Bus
RFU
RFU : Must be set "0"
Extended Mode Register
DLL
BA
1
BA
0
A
11
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
1
A
0
0
1
DLL Enable
Enable
Disable
BA
0
0
1
A
n
~ A
0
(Existing)MRS Cycle
Extended Funtions(EMRS)
QFC control
Disable(Default)
Enable
0
1
Output Driver Impedence Control
0
Normal
1
Weak
QFC D.I.C
Figure 7. Extend Mode Register set
相关PDF资料 |
PDF描述 |
|---|---|
| DDTA113TCA-7-F | PNP PRE-BIASED SMALL SIGNAL SOT-23 SURFACE MOUNT TRANSISTOR |
| DDTA114TCA-7-F | PNP PRE-BIASED SMALL SIGNAL SOT-23 SURFACE MOUNT TRANSISTOR |
| DDTA115TCA-7-F | PNP PRE-BIASED SMALL SIGNAL SOT-23 SURFACE MOUNT TRANSISTOR |
| DDTA123TCA-7-F | PNP PRE-BIASED SMALL SIGNAL SOT-23 SURFACE MOUNT TRANSISTOR |
| DDTA124TCA-7-F | PNP PRE-BIASED SMALL SIGNAL SOT-23 SURFACE MOUNT TRANSISTOR |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DDRSDRAM1111 | 制造商:SAMSUNG 制造商全称:Samsung semiconductor 功能描述:DDR SDRAM Specification Version 1.0 |
| DDR-SJE-Q2 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:LED Colored Resin |
| DDR-SJE-Q2R-1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:LED Colored Resin |
| DDR-SJE-R1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:LED Colored Resin |
| DDR-SJE-R2 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:LED Colored Resin |
发布紧急采购，3分钟左右您将得到回复。