topic Re: Intel 82579LM Gigabit Phy & QM77 PCH - TCTL register and Tx functionalities in Ethernet Products

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

ALouc — Fri, 05 May 2017 09:52:28 GMT

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.html 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 !

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

idata — Mon, 08 May 2017 02:41:47 GMT

Hi Tweety,

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

Thanks,

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

idata — Fri, 12 May 2017 04:32:00 GMT

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,

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

ALouc — Fri, 12 May 2017 09:09:53 GMT

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).

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

idata — Mon, 15 May 2017 00:40:18 GMT

Hi Tweety,

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

Thanks,

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

ALouc — Tue, 16 May 2017 10:16:18 GMT

Yup, got the answer.

Should I post a link to it here ?

Thanks again

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

idata — Wed, 17 May 2017 01:59:52 GMT

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