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ALouc
Beginner
1,384 Views

Intel 82579LM Gigabit Phy & QM77 PCH - TCTL register and Tx functionalities

Hello,

I'm working on the Intel 82579LM linked to a QM77 PCH (7/C210 Series Chipset).

When activating the Tx functionalities, using the TCLT register ( p193 of http://www.intel.com/content/www/us/en/embedded/products/networking/82579-gbe-phy-datasheet-vol-2-1.... Intel® 82579 GbE PHY: Datasheet, Vol. 2.1 )

I noticed that if the "Reserved" "Read only" bit 28 was not specifically set to value '0b1', the Tx functionalities do not work.

Although I agree it is not "best-practice" to set "Reserved" bits, is this behavior normal ?

Many thanks !

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6 Replies
idata
Community Manager
140 Views

Hi Tweety,

 

 

Thank you for posting at Wired community. I will check then update you if there is any information to share.

 

 

Thanks,

 

wb

 

idata
Community Manager
140 Views

Hi Tweety,

 

 

Just to double check if you are referring to page 186 or 193 on the datasheet as the Reserved bit appeared on 186. As your inquiry involvoed design, you can try check with our embedded communities https://embedded.communities.intel.com/community/en

 

 

 

Thanks,

 

wb
ALouc
Beginner
140 Views

Thanks for the update.

Yes, you are right, it's on page 186. I just got fooled by the PDF editor which counts all pages from the start (giving this page n°193).

idata
Community Manager
140 Views

Hi Tweety,

 

 

Thank you for the clarification. Have you had any chance of checking with embedded support?

 

 

Thanks,

 

wb

 

ALouc
Beginner
140 Views

Yup, got the answer.

Should I post a link to it here ?

Thanks again

idata
Community Manager
140 Views

Hi Tweety,

 

 

Thank you for the update. You can do so if there is no information confidentiality concern and if you like to share the information.

 

 

Thanks

 

wb

 

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