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标题: PCIe显卡,16对 Receive 信号是闲置的吗? [打印本页]

作者: Quantum_    时间: 2018-1-24 15:05
标题: PCIe显卡,16对 Receive 信号是闲置的吗?
1. x16 的显卡, 共有HSI(0)n/p ~ HSI(15)n/p 16对Receive信号(显卡到CPU).
$ }" I  q! B" d/ P0 c2. 显卡只是一个输出设备,只接收CPU的输出, 并不需要与CPU高速交互。# l) s2 L1 d! o: L2 J
3. 那么, 第1点描述的16对线, 是否就一直是闲置的? (这么浪费,有点不可思议!特发此问)$ ?5 N; Z! o" _: x

( Y2 u8 X% l7 b- h7 \0 o**参考文书:
* O- a" c4 {! K1 p5 lhttps://en.wikipedia.org/wiki/PCI_Express+ F+ ?# a9 @5 B: p) u( b
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谢谢!
作者: 超級狗    时间: 2018-1-24 22:56
PCI Express Basics and Background& B$ q3 `# v( P$ U, [0 m! \# z8 u6 X$ _
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PCI_Express_Basics_Background.pdf

1.88 MB, 下载次数: 20, 下载积分: 威望 -5


作者: Quantum_    时间: 2018-1-26 14:05
Dear Super5 {* A& [7 H9 P5 c1 {; G7 N% H9 `& H& y
I still can't understand what happened to PCIe receiver signals to make them transmit signal from Device to Host, after reading your attachment carefully.
( ~2 O, _& I  K4 ~Do you mean that the answer of my question is concluded in the chapter below?1 \  s' _3 f$ k( K! Q4 B
"Credit-based flow control is point-to-point based, not end-to-end, ") p+ P: ?3 P. S5 J
or
: \1 w8 e2 M+ I. `"Split Transactions"! v' Q5 e$ z7 n0 Q2 B6 c  E3 l
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Do you have any other stuff for a rookie EE to learn about the PCIe Dispaly Card.
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" [7 b3 z8 F3 I- k5 YThanks very much. 0 v# ^( [5 i& k2 P7 ]$ B

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作者: ykwym    时间: 2018-2-7 22:57
PCIe的有些包发出来是需要接收端发信息回去,确保包是一定被收到的。so。。。
作者: alexfu1984    时间: 2018-11-27 16:15
就需要这个东东,好就一个字




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