有人可以解释7系列的速度等级吗？

两点：
McGett关于不同性能指定，规格和速度文件的观点绝对正确，
即，-1L保证执行-1L，并且当作为-1操作时的性能纯粹是间接的。
您正在从错误的方向接近分箱策略。
-1L确实是-1，当以低10％的电压供电时，其足够快以在相似的性能下工作。
这意味着并非所有-1都可以分箱到-1L要求，并且所有-1L都不能通过测试来保证在-1要求下运行。
为了100％符合操作规范，必须将它们视为独立的产品等级。
Regahds
在原帖中查看解决方案



以下为原文

Two points:
McGett's point regarding different performance designations, specifications and speeds files is absolutely correct,
i.e. a -1L is guaranteed to perform like a -1L, and performance when operated as a -1 is purely circumstantial.
 
You are approaching the binning strategy from the wrong direction.  A -1L is indeed a -1 which is fast enough to operate at similar performance when powered at 10% lower voltage.  This means that not all -1's can be binned to -1L requirements, and all -1Ls are not guaranteed by testing to operate at -1 requirements.  For 100% compliance to operating specs., they must be treated as independent product grades.
RegahdsView solution in original post

速度等级编号末尾的L表示“较低”功率。
干杯，吉姆



以下为原文

The L at the end of speed grade number indicates "Lower" power.
Cheers,
Jim

谢谢你的回复。
据我所知，速度等级应该是相对的，并且表示FPGA可以执行的速度。
我不明白为什么速度等级现在被标记为另一个不是速度测量的标识符。
假设-2L与-2不同，你知道哪一个更快吗？
另外，-2L部分如何通过查看部件号（第12页，ds180）来区分-2部分？
如果他们使用-1和-2速度等级而不是当前的方案，那么它似乎会更加混乱。
对不起我的咆哮回应。



以下为原文

Thanks for the response.
 
I understand that a speed grade is supposed to be relative and representitave metric of how fast an FPGA can perform. I don't understand why a speed grade is now badged another identifier that is not a measurment of speed. Assuming that -2L is not the same as -2, do you know which one is faster? Also, how is a -2L part differentiated between a -2 part by looking at the part number (pg. 12, ds180)?
 
It seems that it would have been much less confusing if they used a -1 and -2 speed grade, rather than this current scheme.
 
Sorry for my rant-ish response.

-nL速度等级的特点是在较低的Vccint下运行。
这反映在数据表中的DC和AC特性中。
-nL设备保证按.9V Vccint规定运行。
尝试使-1L和-1设备的操作相同，但由于不同结构组件的VT操作曲线不同，这通常不适用于所有参数。
对于通过牺牲一些速度性能而获得较低功率的应用，A-nL设备是首选。
Regahds



以下为原文

The -nL speed grades are characterized for operation at lower Vccint.  This is reflected in the DC and AC characteristics in the datasheet.  -nL devices are guaranteed to operate as specified at .9V Vccint.  There is an attempt to make operation of a -1L and a -1 device the same, but this typically does not hold true across all parameters because of different VT operating curves for different fabric components.  A -nL device is preferred for applications where lower power is gained by sacrificing some speed performance.
Regahds

我是工程师，所以我不想过多地进入营销领域。
最简单的方法是-2L器件屏蔽-2器件，泄漏较低，工作在较低的VCCINT（0.9v），这两者都会降低功耗。
目前数据表中还没有-2L器件的时序数，但如果Virtex6有任何指示，-2L器件会略慢于-2，但会显着降低功耗。
你可以看看WP389的完整7系列电源故事。
http://www.xilinx.com/support/documentation/white_papers/wp389_Lowering_Power_at_28nm.pdf
顺便说一下，立即下载Xilinx Document Navigator以查看所有Xilinx文档。
forrestoff写道：
谢谢你的回复。
据我所知，速度等级应该是相对的，并且表示FPGA可以执行的速度。
我不明白为什么速度等级现在被标记为另一个不是速度测量的标识符。
假设-2L与-2不同，你知道哪一个更快吗？
另外，-2L部分如何通过查看部件号（第12页，ds180）来区分-2部分？
如果他们使用-1和-2速度等级而不是当前的方案，那么它似乎会更加混乱。
对不起我的咆哮回应。
干杯，吉姆



以下为原文

I'm an engineer, so I don't want to get too much into the marketing territory. The simplest way to look at it is that -2L devices are screened -2 devices with lower leakage and operating at lower VCCINT (0.9v), which both result in lower power. There are no timing numbers for -2L devices in the datasheet yet, but if Virtex6 is any indication, -2L devices would be slightly slower than -2 but offer significant power reduction. You can take a look at WP389 for the complete 7 series power story. 
 
http://www.xilinx.com/support/documentation/white_papers/wp389_Lowering_Power_at_28nm.pdf
 
By the way, download Xilinx Document Navigator today to view all Xilinx documents.
 
 
 
 
 
 

forrestoff wrote:
Thanks for the response.
 
I understand that a speed grade is supposed to be relative and representitave metric of how fast an FPGA can perform. I don't understand why a speed grade is now badged another identifier that is not a measurment of speed. Assuming that -2L is not the same as -2, do you know which one is faster? Also, how is a -2L part differentiated between a -2 part by looking at the part number (pg. 12, ds180)?
 
It seems that it would have been much less confusing if they used a -1 and -2 speed grade, rather than this current scheme.
 
Sorry for my rant-ish response.

 
 
Cheers,
Jim

感谢您的解释。
我正在查看WP389第9页和第10页上的一个段落，它确切地说明了你提到的 -  -2L部件是装箱-2部件，具有更好的泄漏性能。
物理学说，如果你降低Vcc，你的设备会变得更慢（当然也在相反的范围内）。
该文件在图2中与此一致，pg。
5。
但是，该文件陈述如下，pg。
9，如果上述内容正确则令人困惑：
“以0.9V运行的设备被指定为”-1L“，基于其速度等级。它们的性能类似于-1速度等级，但”L“表示较低的功率。
这表明-1和-1L在速度方面没有区别，如果它们在正常功率Vcc下运行，那么-1L部分的执行速度可能比-1部分快。
你觉得这样说准确吗？
跳回到营销领域 - 如果你有一个部分说它的功率较低，你为什么还需要在速度等级中包含这些信息？
这只是右下方的混乱，但同意 - 可能只对xilinx琐事比赛有用。



以下为原文

Thanks for the explanation.
 
I'm looking at a paragraph on page 9 and 10 of the WP389 and it suggests exactly what you mentioned--that the -2L parts are binned -2 parts with better leakage performance. Physics says that if you lower Vcc, your device is going to become slower (and just the opposite as well, within limits of course). The document agrees with this in Figure 2, pg. 5.
 
However, the document states the following, pg. 9, which is confusing if the above is correct:
 
"Devices that run at 0.9V are designated "-1L," based on their
speed grade. Their performance is similar to that of a -1 speed grade, but the “L”
signifies lower power."
 
This would suggest that the -1 and -1L are no different in terms of speed and that, perhaps, the -1L parts would perform faster than a -1 part if they were run at a nomal-power Vcc.
 
Do you think that's accurate to say?
 
Jumping back into the marketing territory--if you have a part that says it's lower power, why do you need to contain this information in the speed grade as well? This is just down-right confusing, but, agreed--probably only useful for a xilinx trivia match.

因此，例如，给定-1L设备，它是否会像标准Vcc中的-1标准部件一样运行，但是还能够以较低的Vcc运行以达到性能命中（低于-1性能）？
如果不是WP389第9页上的那一段，这是有道理的。



以下为原文

So for example, given a -1L device, would it operate like a -1 standard part at standard Vcc but also have the capability to be run at a lower Vcc for a hit in performance (below -1 performance)? This would make sense if it weren't for that paragraph on pg 9 on WP389.

-L器件的额定电压为0.9V，所有器件规格仅保证在此电压下工作。
对于这些设备，将有单独的速度文件和数据表规格，对于大多数参数，它们与普通1.0V设备中的相同速度等级相同，但某些参数会有所不同。
白皮书提供了一般信息，但规格可在数据表中找到。
------您是否尝试在Google中输入问题？
如果没有，你应该在发布之前。太多结果？
尝试添加网站：www.xilinx.com



以下为原文

The -L devices are specified to run at 0.9V and all device specifications will only be guaranteed to work at this voltage. 
 
There will be separate speed files and data sheet specifications for these devices that will be the same for most parameters as the same speed grade in a regular 1.0V device, but there will be differences in some parameters.
 
White papers provided general information, but specifications are found in the data sheet.
------Have you tried typing your question into Google?  If not you should before posting.
Too many results?  Try adding site:www.xilinx.com

两点：
McGett关于不同性能指定，规格和速度文件的观点绝对正确，
即，-1L保证执行-1L，并且当作为-1操作时的性能纯粹是间接的。
您正在从错误的方向接近分箱策略。
-1L确实是-1，当以低10％的电压供电时，其足够快以在相似的性能下工作。
这意味着并非所有-1都可以分箱到-1L要求，并且所有-1L都不能通过测试来保证在-1要求下运行。
为了100％符合操作规范，必须将它们视为独立的产品等级。
Regahds



以下为原文

Two points:
McGett's point regarding different performance designations, specifications and speeds files is absolutely correct,
i.e. a -1L is guaranteed to perform like a -1L, and performance when operated as a -1 is purely circumstantial.
 
You are approaching the binning strategy from the wrong direction.  A -1L is indeed a -1 which is fast enough to operate at similar performance when powered at 10% lower voltage.  This means that not all -1's can be binned to -1L requirements, and all -1Ls are not guaranteed by testing to operate at -1 requirements.  For 100% compliance to operating specs., they must be treated as independent product grades.
Regahds

我终于理解了！
谢谢大家的澄清。



以下为原文

I understand, finally!  Thank you, all, for the clarification.