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EM47FM3288SBB 参数 Datasheet PDF下载

EM47FM3288SBB图片预览
型号: EM47FM3288SBB
PDF下载: 下载PDF文件 查看货源
内容描述: 16GB ( 64mA的?? 8Bankà ?? 32 ),双数据速率3 SDRAM堆叠 [16Gb (64M×8Bank×32) Double DATA RATE 3 Stack SDRAM]
分类和应用: 动态存储器
文件页数/大小: 41 页 / 1147 K
品牌: EOREX [ EOREX CORPORATION ]
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EM47FM3288SBB  
refresh. Upon Self-Refresh exit, DDR3 SDRAM will not perform an IO calibration without an explicit  
ZQ calibration command. The earliest possible time for ZQ Calibration command (short or long) after  
self refresh exit is tXS.  
In systems that share the ZQ resistor between devices, the controller must not allow any overlap of  
tZQoper, tZQinit, or tZQCS between the devices.  
ZQ Calibration Timing  
ZQ Calibration Method  
The ZQ calibration in DDR3 is used both for the output driver and the ODT. The ZQ ball of each DRAM is  
connected to an external precision (±1%) 240Ω resistor. This resistor may be shared among devices as long as  
the controller does not overlap any timing associated with the calibration and as long as the capacitive loading  
does not exceed specification.  
Pull-up Calibration  
The calibration control block consists of an analog-to-digital converter (ADC), comparators, a majority filter, an  
Jul. 2012  
13/41  
www.eorex.com  
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