DP83826I: All the register's value are 1E5

Gary Zeng

Part Number: DP83826I

Tool/software:

Hi team,

My customer is using DP83826 for EtherCAT function in AC servo product.

In the past, they use MCU output one same 25MHz clock signal to two DP83826s and there is no issue.

Now, they build a new board that MCU output two 25MHz clock signals to two DP83826s and they meet the issue.

Issue is that when they read all the registers, the value are 1E5. It is very strange.

Can you give some ideas for this case?

0 J 2 days ago

Hi Gary,

US office is closed for holiday 9/1. We will get back to you on 9/2 US time.

Best,
J

0 David (ASIC) Liu 2 days ago in reply to J

Gary

Do they see this issue if they are using separate clock?

Please do not drive one clock to both DP83826 as the stub will cause reflection and that reflection would impact the input clock quality. You can use

1. Use a clock buffer to drive separate clock to DP83826

2. Use one DP83826 CLKOUT to drive the 2nd DP83826

Thanks

David

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