- 您现在的位置：买卖IC网 > PDF目录68559 > W972GG8JB-18 (WINBOND ELECTRONICS CORP) 256M X 8 DDR DRAM, 0.35 ns, PBGA60 PDF资料下载
参数资料
| 型号： | W972GG8JB-18 |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | DRAM |
| 英文描述： | 256M X 8 DDR DRAM, 0.35 ns, PBGA60 |
| 封装： | 11 X 11.50 MM, ROHS COMPLIANT, WBGA-60 |
| 文件页数： | 19/86页 |
| 文件大小： | 1466K |
| 代理商： | W972GG8JB-18 |
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页第17页第18页当前第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页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页
W972GG8JB
Publication Release Date: Feb. 18, 2011
- 26 -
Revision A02
7.4.5
Write data mask
One write data mask (DM) pin for each 8 data bits (DQ) will be supported on DDR2 SDRAM,
consistent with the implementation on DDR1 SDRAM. It has identical timings on write operations as
the data bits, and though used in a unidirectional manner, is internally loaded identically to data bits to
insure matched system timing. DM function is disabled, when RDQS / RDQS are enabled by
EMRS(1). (Example timing waveform refer to 10.15 Write operation with Data Mask diagram in
Chapter 10)
7.5
Burst Interrupt
Read or Write burst interruption is prohibited for burst length of 4 and only allowed for burst length of 8
under the following conditions:
1. Read burst of 8 can only be interrupted by another Read command. Read burst interruption by
Write or Precharge Command is prohibited.
2. Write burst of 8 can only be interrupted by another Write command. Write burst interruption by
Read or Precharge Command is prohibited.
3. Read burst interrupt must occur exactly two clocks after the previous Read command. Any other
Read burst interrupt timings are prohibited.
4. Write burst interrupt must occur exactly two clocks after the previous Write command. Any other
Write burst interrupt timings are prohibited.
5. Read or Write burst interruption is allowed to any bank inside the DDR2 SDRAM.
6. Read or Write burst with Auto-precharge enabled is not allowed to interrupt.
7. Read burst interruption is allowed by a Read with Auto-precharge command.
8. Write burst interruption is allowed by a Write with Auto-precharge command.
9. All command timings are referenced to burst length set in the mode register. They are not
referenced to the actual burst. For example below:
Minimum Read to Precharge timing is AL + BL/2 where BL is the burst length set in the
mode register and not the actual burst (which is shorter because of interrupt).
Minimum Write to Precharge timing is WL + BL/ 2 + tWR, where tWR starts with the rising
clock after the un-interrupted burst end and not from the end of the actual burst end.
(Example timing waveforms refer to 10.13 and 10.14 Burst read and write interrupt timing diagram in
Chapter 10)
相关PDF资料 |
PDF描述 |
|---|---|
| W9751G6JB-18 | 32M X 16 DDR DRAM, 0.35 ns, PBGA84 |
| W981204AH-8H | 32M X 4 SYNCHRONOUS DRAM, 6 ns, PDSO54 |
| W981216BH75L | 8M X 16 SYNCHRONOUS DRAM, 5.4 ns, PDSO54 |
| W981216BH-75 | 8M X 16 SYNCHRONOUS DRAM, 5.4 ns, PDSO54 |
| W9812G2IH-6 | 4M X 32 SYNCHRONOUS DRAM, 5 ns, PDSO86 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| W972GG8JB-25 | 制造商:Winbond Electronics Corp 功能描述:2GMB DDRII 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 2.5NS 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 2.5NS 60WBGA |
| W972GG8JB-25I | 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 2.5NS 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 2.5NS 80WBGA |
| W972GG8JB-3 | 制造商:Winbond Electronics Corp 功能描述:DRAM Chip DDR2 SDRAM 2G-Bit 256Mx8 1.8V 60-Pin WBGA 制造商:Winbond Electronics Corp 功能描述:IC DDR2 SDRAM 2GBIT 3NS |
| W9751G6IB-25 | 功能描述:IC DDR2-800 SDRAM 512MB 84-WBGA RoHS:是 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:1,000 系列:- 格式 - 存储器:EEPROMs - 串行 存储器类型:EEPROM 存储容量:4K (512 x 8) 速度:400kHz 接口:I²C，2 线串口 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.173"，4.40mm 宽） 供应商设备封装:8-MFP 包装:带卷 (TR) |
| W9751G6JB | 制造商:WINBOND 制造商全称:Winbond 功能描述:8M ? 4 BANKS ? 16 BIT DDR2 SDRAM |
发布紧急采购，3分钟左右您将得到回复。