DS90UA102-Q1: GPO Output status before PLL Lock

Kawai

Guru 19785 points

Part Number: DS90UA102-Q1

Hi Team,

Please allow me to ask you the output status of DS90UA102 GPO output.

Would the device output uncertain signal (high, low, or floating) from GPO when UA102 PLL is not locked ?

How does the pin behave during power up and before PLL lock ?

Best Regards,

Kawai

0 Palaniappan Manickam over 8 years ago

Hello, we received your question and this is assigned for Apps to look at and respond to.

0 Darryl Jeong over 8 years ago

Hi Kawai-san,

I will setup on bench with curve tracer to double check for you.

I will get back with you by the end of the week.

Best regards,

Darryl

0 Kawai over 8 years ago in reply to Darryl Jeong

Guru 19785 points

Hi Darryl-san,

Thanks for your support.

Just in case, could you please confirm the output behavior from the design point of view, too ?

Because, we may not be able to see abnormal operation in the bench evaluation.

We look forward to hearing from you soon.

Best Regards,
Kawai

0 Darryl Jeong over 8 years ago in reply to Kawai

Hi Kawai,

I applied power to the UA102 and curve traced the GPIOs and they are all logic HIGH.

Best regards,

Darryl

0 Kawai over 8 years ago in reply to Darryl Jeong

Guru 19785 points

Hi Darryl-san,

Thanks for the testing.

Best Regards,
Kawai

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