DP83TD510E: EVM doesn't work

Oba

Part Number: DP83TD510E
Other Parts Discussed in Thread: , USB-2-MDIO

Hello,

Our customer is evaluating DP83TD510E-EVM and facing a problem.
Now 2 DP83TD510E-EVMs and a network test equipment are connected like the below figure and they tested the communication between each EVM.
Then the link itself seemed to be established, but when the network test equipment sends a test flame to each EVMs, any communication between EVMs was not done.

The below is their jumper configuration of this EVM

J12(external power) : 5V

J9 (USB-5V) : Open

J14/J15/J16 : internal power

J17/J18 : 1

J19: LED_0

J20: 0 (DP83TD510E: Master, DP83822: Slave)

J26/J27 : EXT

They didn’t configure any registers through USB-2-MDIO.

What do you think the root cause is?

Regards,

Oba

over 4 years ago

0 Adrian Kam over 4 years ago

TI__Expert 5425 points

Hi Oba,

Can you perform a reverse loopback test on the DP83822 and an analog loopback test on the DP83TD510 of both EVMs? I would like to know if you can read back the data that you send.

Regards,

Adrian Kam

0 Oba over 4 years ago in reply to Adrian Kam

TI__Genius 17295 points

Hello Adrian,

Thanks for your reply.
How do they do a reverse loopback and an analog loopback test?

Regards,
Oba

0 Cecilia Reyes over 4 years ago in reply to Oba

TI__Genius 9920 points

Hi there,

Adrian is currently out of the office. Please expect some delay in answers in the upcoming days during this holiday.

Thanks!

0 Adrian Kam over 4 years ago in reply to Cecilia Reyes

TI__Expert 5425 points

Hi Oba,

You can refer to section 7.3.10 of the datasheet on how to setup the loopback test mode. Bits[6:0] of register 0x0016 is used to configure the device to the different loopback modes.

Regards,

Adrian Kam

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DP83TD510E: EVM doesn't work