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参数资料
| 型号： | DDRSDRAM1111 |
| 厂商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | DDR SDRAM Specification Version 1.0 |
| 中文描述： | DDR SDRAM的规范版本1.0 |
| 文件页数： | 51/53页 |
| 文件大小： | 669K |
| 代理商： | DDRSDRAM1111 |
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REV. 1.0 November. 2. 2000
128Mb DDR SDRAM
12. QFC function
when drive low on reads coincident with the start of DQS, this DRAM output signal says that one cycle later
there will be the first valid DQS output and returned to HI-Z after this finishing a burst operation. It is also
driven low shortly after a write command is received and returned to HI-Z shortly after the last data strobe
transition is received. Whenever the device is in standby, the signal is HI-Z. DQS is intended to enable an
external data switch. QFC can be enabled or disabled through EMRS control
.
QFC timing on Read operation
QFC on reads is enabled coincident with the start of DQS preamble, and disabled coincident with the end of
DQS postamble
Command
2
0
1
5
3
4
8
6
7
Read
Dout 0 Dout 1
Hi-Z
DQS
DQ’S
QFC
t
QCS
t
QCH
CL = 2, BL = 2
CK
CK
QFC definition
Figure 26. QFC timing on read operation
相关PDF资料 |
PDF描述 |
|---|---|
| DDRSDRAM | DDR SDRAM Specification Version 0.61 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| DDR-SJS-R1 | 制造商:DOMINANT 制造商全称:DOMINANT Semiconductors 功能描述:LED AlInGaP |
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