JTAG_TCLK_CPU signal pulled low on Icelake-d-lcc device.

[gmm20]

We are driving the SOC input signal, the JTAG_TCK_CPU (AH51) ; input signal from an Intel Voltage translator buffer, the SN74AXC8T245JWR at 1.01 VOH. The device is the 3rd generation Xeon D-1700. When the device is powered on, it pulls the input signal down (VIH) to approximately 0.650 Volts. We have no idea what could be root cause.

[CarlosAM_INTEL]

Hello, @gmm20:

Thank you for contacting Intel Embedded Community.

We received your request, but we want to address the following questions:

Could you please let us know the part number of the processor related to your request? Where do you acquire this processor?

We are waiting for your answer.

Best regards,

@CarlosAM_INTEL.

[gmm20]

Could you please let us know the part number of the processor related to your request?  D-1700

Where do you acquire this processor? 

I don’t understand the question. I did not acquire them personally.

There are about 100 of these Intel Xeon SoC’s , installed on next generation of Internet router(s). All of them have this issue…’

-g

[CarlosAM_INTEL]

Hello, @gmm20:

Thanks for your reply.

Based on your last communication, we want to address the following questions:

Could you please give us the part number and name of the manufacturer of the "next generation of Internet routers" where the processors related to your request are installed?

Is it possible to have pictures of the top side markings of the processors related to your request?

We are waiting for your reply.

Best regards,

@CarlosAM_INTEL. 

[gmm20]

Xeon

[CarlosAM_INTEL]

Hello, @gmm20:

Thanks for your quick reply.

However, we need your answer to our first question in the previous communication. By the way, the provided picture is blurry, could you please provide a better-focus picture?

We are waiting for your reply.

Best regards,

@CarlosAM_INTEL.

[gmm20]

Hello.

1. the part number is Xeon D-1749 NT.

2. Upon further review, we believe the root cause is a blown input buffer gate, on the JTAG TCLK signal line ; BGA ( AH51 ).

I believe the company intends to scrap all the modules with this part installed. As such, no further action is required for this case...........

[CarlosAM_INTEL]

Hello, @gmm20:

Thanks for your reply.

The Intel® Xeon® D-1749NT Processor is a non-embedded processor as you may confirm on the following website:

https://ark.intel.com/content/www/us/en/ark/products/226101/intel-xeon-d1749nt-processor-15m-cache-up-to-3-50-ghz.html

Due to this fact, this forum has been transferred to the proper channel of support.

The person in charge of it may contact you as soon as possible.

Thanks for your comprehension and understanding. 

Best regards,

@CarlosAM_INTEL.