cyusb3014 官方电路中 ss端 rx_m 和 rx_p 是不是接反了??

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user_1564606
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如题。cy的官方人员 能不能给解释一下啊

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1 解答
JayakrishnaT_76
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Moderator
Moderator
First question asked 1000 replies posted 750 replies posted

Hello,

The polarity can be swapped on the USB 3.0 differential pairs. Polarity detection is done automatically by the USB 3.0 PHY during link training, as defined in the USB3.0 specification section 6.4.2, and does not require any additional changes to device firmware. Given the different USB connectors pinouts, the polarity inversion mechanism can be used to ensure that USB traces do not cross each other.

The same can be found in page 16 of the Application Note AN70707. The link to the same can be found below:

https://www.cypress.com/file/139936/download

Best Regards,

Jayakrishna

Best Regards,
Jayakrishna

在原帖中查看解决方案

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JayakrishnaT_76
Moderator
Moderator
Moderator
First question asked 1000 replies posted 750 replies posted

Hello,

The polarity can be swapped on the USB 3.0 differential pairs. Polarity detection is done automatically by the USB 3.0 PHY during link training, as defined in the USB3.0 specification section 6.4.2, and does not require any additional changes to device firmware. Given the different USB connectors pinouts, the polarity inversion mechanism can be used to ensure that USB traces do not cross each other.

The same can be found in page 16 of the Application Note AN70707. The link to the same can be found below:

https://www.cypress.com/file/139936/download

Best Regards,

Jayakrishna

Best Regards,
Jayakrishna
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