cancel
Showing results for 
Search instead for 
Did you mean: 

USB Hosts Hubs Transceivers

MaMi_1205306
Honored Contributor

Dear Sirs and Madams,

Please tell us the details of "Requirements for XIN (External Clock Input)".

AN72332 URL

https://www.cypress.com/file/122726/download

AN72332 --Guidelines on System Design using Cypress's USB 2.0 Hub (HX2VL), page 5 states:

pastedImage_3.png

Could you please provide us for the BW condition of this phase jitter?

For example, 12kHz to Nyquist frequency, etc.

Regarding this "External Clock Input Requirements",

Please let us know if there are detailed conditions such as masking by phase noise value.

Regards,

0 Likes
1 Solution
Sananya_14
Moderator
Moderator

Hello,

Currently we dont have the bandwidth values for the jitter RMS value mentioned in the App Note, we are checking internally on this.

Please refer to the KBA for the details on clock input requirements- Clock Jitter for EZ-USB® HX2LP™ and EZ-USB® HX2VL™ – KBA88959

Best Regards,

Sananya

View solution in original post

0 Likes
3 Replies
Sananya_14
Moderator
Moderator

Hello,

Currently we dont have the bandwidth values for the jitter RMS value mentioned in the App Note, we are checking internally on this.

Please refer to the KBA for the details on clock input requirements- Clock Jitter for EZ-USB® HX2LP™ and EZ-USB® HX2VL™ – KBA88959

Best Regards,

Sananya

View solution in original post

0 Likes
MaMi_1205306
Honored Contributor

Sananya-san,

Thank you for your reply.

pastedImage_0.png

Please check the conditions of the specifications.

We will wait for an answer.

Regards,

0 Likes
Sananya_14
Moderator
Moderator

Hello,

 

Unfortunately we currently dont have the clock specification conditions related data. However, we have run tests on our side with external clock on HX2VL and verified the jitter value mentioned in the App Note so kindly follow the same.

 

Best Regards,

Sananya

0 Likes