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USB Low-Full-High Speed Peripherals

SuSh_1535366
New Contributor II

Hello,

We would like to use CY8C68013A with external clock (not crystal) input.

In the data sheet, only "3.3 V square wave" is written as the condition of external clock input.

Please tell me about other conditions (slew rate, duty cycle, clock accuracy, etc....).

Regards,

Shimamura

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1 Solution
SuSh_1535366
New Contributor II

Hello,

I got an answer from Cypress in the myCase.

Specifications required for external clock are:

- 3.3V square wave

- 50% duty cycle

- +- 100ppm accuracy

- max. 1ns rise/fall time

I hope this information is helpful to someone.

Thank you.

View solution in original post

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2 Replies
SuSh_1535366
New Contributor II

Anybody here?

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SuSh_1535366
New Contributor II

Hello,

I got an answer from Cypress in the myCase.

Specifications required for external clock are:

- 3.3V square wave

- 50% duty cycle

- +- 100ppm accuracy

- max. 1ns rise/fall time

I hope this information is helpful to someone.

Thank you.

View solution in original post

0 Likes