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USB hosts hubs transceivers Forum Discussions

TeMa_2997106
Level 6
Level 6
10 likes received 10 solutions authored 250 replies posted

What is the voltage value for recognizing High or Low in the following signal, which is the data signal of CY7C65630-56LTXC?
D+
D-
DD+
DD-

My understanding is that these lines are differential signals, so the Vih/Vil given in the datasheet cannot be specified.

Thanks,
Tetsuo

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2 Replies
TakashiO
Moderator
Moderator
Moderator
100 sign-ins 50 replies posted 25 solutions authored

Hi @TeMa_2997106,

Thank you for posting into our community.

The RX sensitivity is specified to be met with Template 4 in USB2.0 standard. Please find the following section in the USB2.0 standard.

>7.1.2.2 High-speed Signaling Eye Patterns and Rise and Fall Time

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TeMa_2997106
Level 6
Level 6
10 likes received 10 solutions authored 250 replies posted

Takashi-san,

Thank you for your quick response.
I will check the specification.

Thanks,
Tetsuo

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