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近期有批wasabi2到货,但是发现其外观与一代完全一致,因此没有敢装,今天看到wasabi官方消息,准备周末去***咯 hoho
来自wasabi官方网站:
我大致解释一下:(donkayjan 胡乱翻译)
我们将换回使用VQ100 FPGA 包装!也就是说,wasabi二代将与一代一样使用PCB线路板,但是有“兼容d2c2”贴纸以显示其区别(图片随后奉上)。我们必须强调的是,该电路性质与基于BGA的wasabi二代100%接近(为什么不用same???),包括其被动值,LDO,PPGA I/O码等,我们花了无数的时间进行测试所以你可以相信其稳定情况。
详细的来龙去脉是,几个月前,全球范围内Acel缺货,因此你可以看到我们的竞争对手在A3P125和A3P250 FPGA之间进行变化,而非常规便宜的A3P060。我们不得不换到BGA包装进行储备,所以后来做出了相应的新PCB电路板(用相同的电路图)。但是现在我们能够换回在制造和质量控制上更容易的VQ100板。
总之第二代现在有两种(VQ100和BGA),两者在功能和稳定性上一致。如果你已经收到这种芯片,请不要担心,希望此文能解释明白。
原文见下:
2nd of July 2008 - Revision 2 - VQ100 now shipping - Rock Solid.
We're switching back to VQ100 FPGA packaging ! That means the new Wasabi revision 2 chips use the same PCB layout as revision 1, but it have a "D2C2 compatible" sticker to differentiate them (picture coming soon). We must stress that the electrical characteristics of this chip are 100% similar to BGA-based Wasabi rev. 2, including passive values, LDO, FPGA I/O code, etc. and we spent countless hours testing it so you can really count on its stability.
For those who want the long story, a couple of months ago there has been a worldwide shortage of Actel chips. That's why you have seen our competitors switching between A3P125 and A3P250 FPGA instead of the usual (cheaper) A3P060. We had to switch to BGA packaging to get stock, and made a new corresponding PCB layout (using the exact same schematics). But now we're able to switch back to VQ100 which is much easier to handle in terms of manufacturing and quality control.
To sum up, revision 2 now exists in two flavors (VQ100 and BGA), but they are identical regarding functionnality and stability. If you already received such a chip and were worried about it, we hope it now makes things clear!. |
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