DP83822H: Technical Query

NITU PAL

Prodigy 70 points

Part Number: DP83822H

Hello,

With reference to below part number,

TI : DP83822

We are using this phy with HI3516AV300 and many other soc.

Does MDC of DP83822 have an internal Pull Down inside? If yes, What is Pull Down value.

We could not find such information about Pull down or Pull up on this MDC pin from the Datasheet of DP83822.

We need an immediate response on same.

over 4 years ago

0 Nikhil Menon over 4 years ago

TI__Genius 11725 points

Hello,

According to Table 1 in the datasheet, on reset, MDC is a pull-down. I have reached out to the appropriate party to confirm pin status and pull value. I will be able to provide an update next week.

Thank you,

Nikhil

0 NITU PAL over 4 years ago in reply to Nikhil Menon

Prodigy 70 points

Hello Nikhil,

There is no such table in the datasheet.

Please refer to the attached datasheet we are referring..

Texas_Instruments-DP83822IRHBT-datasheet.pdf

0 Aniruddha Khadye over 4 years ago in reply to NITU PAL

TI__Mastermind 18425 points

Hello,

Thanks for the follow up. Replies on E2E are delayed due to end of year holidays. We will get back to you by Jan 7.

-Regards

Aniruddha

0 Nikhil Menon over 4 years ago in reply to Aniruddha Khadye

TI__Genius 11725 points

Hello,

Apologies for the confusion, it looks like the datasheet you have attached is an older version. The datasheet linked here is the latest version, version E:

Table 1 in section 6.1 describes the pin states in reset. I have reached out to our design team to determine the value of the internal pull and will provide an update by the end of the week.

Thank you,

Nikhil

0 Nikhil Menon over 4 years ago in reply to Nikhil Menon

TI__Genius 11725 points

Hello,

Internal pull-value should be 9k +/- 25%. May I ask why pull value of MDC is needed?

Thank you,

Nikhil

0 kalpesh diyora over 4 years ago in reply to Nikhil Menon

Intellectual 265 points

Hi,

Why such strong pull value of 9K inside? Why this information not present in datasheet?

Generally internal pull down value will be more than 50K in most of the device. Many are of 100K as internal pulls.

0 Nikhil Menon over 4 years ago in reply to kalpesh diyora

TI__Genius 11725 points

Hello,

We are looking into your question and I will provide an update by Friday of this week latest.

Thank you,

Nikhil

0 kalpesh diyora over 4 years ago in reply to Nikhil Menon

Intellectual 265 points

Hello,

Please update on this.

Regards,

Kalpesh

0 Nikhil Menon over 4 years ago in reply to kalpesh diyora

TI__Genius 11725 points

Hi Kalpesh,

Apologies for the delay and for my miscommunication. In section 7.5, the last 3 rows of the table show the integrated pull resistor values and tolerances. 50k would be too weak a pull value, the line may pick up additional noise. Please let me know if you have any further questions.

Thank you,

Nikhil

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DP83822H: Technical Query