DP83822I: Couldn't link with ET1100

Shu-Cheng LIN

Guru 11785 points

Part Number: DP83822I
Other Parts Discussed in Thread: TLK110,

Hi Sirs,

Sorry to bother you.

As title, DP83822 couldn't link with ET1100

Actually we use TLK110 before and could be work, but change to DP83822 is fail.

The boot strap already setting, the 25MHz CLK ready too.

We think schematic is OK, but could you help double confirm again?

ET1100 schematic

DP83822I schematic:

over 7 years ago

0 Shu-Cheng LIN over 7 years ago

Guru 11785 points

Hi Sirs,

Sorry for push, any update on this ?

Thanks!!

0 Shu-Cheng LIN over 7 years ago in reply to Shu-Cheng LIN

Guru 11785 points

Hi Sirs,

Sorry for push, any update on this ?

Thanks!!

0 Shu-Cheng LIN over 7 years ago in reply to Shu-Cheng LIN

Guru 11785 points

Hi Sirs,

Update state.

We found RX_CLK only sent 1.25MHz? From datasheet spec is 25MHz on 100Mbps MII Mode, so should be 2.5MHz on 10Mbps.

Am i wrong??

Could you share experience for us?

0 Aniruddha Khadye over 7 years ago in reply to Shu-Cheng LIN

TI__Mastermind 18425 points

Hello Shu-Cheng,

What are the problem symptoms?
When you say that the PHY doesn't work with ET1100, does the PHY power-up and link with a link partner?
Can you provide the the register values of 0x00, 0x01, 0x09, 0x0A, 0x0B, 0x10, 0x11, 0x016, 0x017, 0x018, 0x019 after power-up and connection with link partner? Please read register 0x01 two times, all other registers can be read once.
In your schematics, there is a separate "Strap" section but PHY0_Link and PHY0_ACT have extra resistors connected on the last photo, R194 and R168. Can you tell me why those resistors were added?

-Regards,
Aniruddha

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DP83822I: Couldn't link with ET1100