TUSB542EVM: Pin assign is different between datasheet and EVM

Masakazu Adachi

Intellectual 2500 points

Part Number: TUSB542EVM

Hello team,

I think the highlighted parts are mixed up, is the datasheet correct?

Regards,

Masakazu

over 2 years ago

0 David (ASIC) Liu over 2 years ago

TI__Guru**** 159981 points

Masakazu-san

The pin name in the EVM needs to be updated.

RX_AP+/- (pin 17 and 18) is the output, which needs to be AC coupled (C1 and C2).

TX_AP+/- (pin 14 and 15) is the input, since the AC coupling caps are on the corresponding TX, then there is no need for AC coupling caps. Please note that in the latest USB ECN, they do recommend optional 330uF cap on TX_AP+/- on the receiver side.

Thanks

David

0 Masakazu Adachi over 2 years ago in reply to David (ASIC) Liu

TI__Intellectual 2500 points

Hello David-san,

I'm asking a different question.

I think the positive and negative connections in the highlighted area are reversed in the datasheet and EVM.

Is either correct?

Regards,

Masakazu

+1 David (ASIC) Liu over 2 years ago in reply to Masakazu Adachi

TI__Guru**** 159981 points

Masakazu-san

There is no issue with swap polarity, for USB3 specification all the USB3 PHYs must be able to detect any polarity inversion and compensate it.

Thanks

David

0 Masakazu Adachi over 2 years ago in reply to David (ASIC) Liu

TI__Intellectual 2500 points

Hi David-san,

I understand. Thanks to the support.

Regards,

Masakazu

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TUSB542EVM: Pin assign is different between datasheet and EVM