11 Replies Latest reply on Jun 16, 2016 1:21 PM by Carlos_A

    82C226 Part identification

    PVWB Brown Belt

      We are having a difficult time with our latest revision of the
      PacketRunner2i.  This is the board with the Intel processor
      and PCH part.  The new board has a short on the 1.05V ASW
      power supply.  When the PCH part is removed, the short clears.
      Both boards have the same pads connected to the 1.05V ASW
      power supply and the ground pads are the same in both designs
      We are having problems with a short to ground on the 1.05V ASW
      power line.  Our previous run of boards had exactly the same
      pins connected to 1.05V ASW and ground and we did not get the
      1.05V ASW line shorted to ground.

       

      The 82C226 parts were purchased at different times.  I have
      chosen a sample of parts from different purchases.  All the 82C226
      parts have four different markings on them, none of them being
      the device part number.  Can you tell us if the following parts
      are all identical 82C226 devices?  Have there been any changes
      in power pins assignments recently in this part?

       

      Board   SN      Intel markings
      Rev 2   115     SR179   11E406C086      MD420160A04158  G31426 01 ERJ
      Rev 1   107     SR179   11E406C086      MD420160A04149  G31426 01 ELN
      Rev 0   101     SR179   11E406C086      MD420160A04962  G31426 01 EEP
      Loose           SR179   11V5518066      N1551066A05345  G31426 01 YOK12
      Part.

       

      Thanks, Paul.

        • Re: 82C226 Part identification
          Carlos_A Brown Belt

          Hello PVWB ,

           

          Thank you for contacting the Intel Embedded Community.

           

          In order to better understand your questions, we would like to address the following questions:

           

          Could you please clarify us if the PacketRunner2i is related to the device mentioned at the following website?

           

          http://www.adax.com/wordpress/wp-content/uploads/2015/10/adax_apr2i.pdf 

           

          Could you please give us the pictures of the top side markings of the 82C226 units related to your questions?

           

          Please give us all the information that may answer these questions,

           

          Thanks in advance for your collaboration.

           

          Best Regards,

          Carlos_A.

           

            • Re: 82C226 Part identification
              PVWB Brown Belt

              Dear Carlos,

               

              The link you have is for the board we are working on.  The picture is from a

              previous version with a Cavium processor, as the data sheet predates the

              board.  The block diagram is correct however.

               

              I am attaching a sketch that shows the location of the various numbers.

              I don't have a suitable camera to take an image of the entire part.

               

              82C226numbers.jpg

              Thanks, Paul.

                • Re: 82C226 Part identification
                  Carlos_A Brown Belt

                  Hello PVWB ,

                   

                  Thanks for your reply.

                   

                  In order to better understand this situation, we would like to address the following questions:

                   

                  Could you please confirm us if the affected design worked properly? Has it started to fail when you implemented changes on it? Please let us know these changes.

                   

                  Could you please inform us if the schematics and layout related to this project have been reviewed by Intel, please give us all the information related to these processes?

                   

                  Could you please tell us how many Intel(R) C226 Chipsets are related to this situation and where they have been acquired? By the way, it will be appreciated from our side if you give us the markings of the affected units.

                   

                  Thanks in advance to give us all the requested information.

                   

                  Best Regards,

                  Carlos_A.

                    • Re: 82C226 Part identification
                      PVWB Brown Belt

                      Dear Carlos,

                       

                      We have had three revisions of this board.  We only get this
                      problem on the latest revision, which is Rev 2.  We made two
                      changes to the PCH device.  Our BIOS suppliers could never get
                      24 MHz out of pin AT9 for the SuperIO chip, so we just used a
                      buffer from an existing 24MHz oscillator.  Pin AT9 is now not
                      connected to anything.

                       

                      We added a device to the LPC bus and we used pin AN9 as a clock
                      source for the additional device.

                       

                      We have compared the Gerber files for the boards and there do
                      not seem to be any additional, unwanted changes to the PCH area
                      of the board.

                       

                      The Rev 0 design was reviewed by Intel and we incorporated most
                      of their advice into the Rev 1 design.  Most of the differences
                      were due to our use of an FPGA instead of the discrete logic
                      liked by Intel.  In the Rev 2 design, we fixed DDR3 routing
                      lengths and 10G Ethernet signals on the board, as well as the
                      PCH changes listed above.

                       

                      The connection between VCCASW and ground is in the device.
                      After removing the part from the board, the short on the board
                      disappears.  We can measure the short on the balls on the part.
                      The short is not present on parts we have in stock, not assembled
                      onto boards, based on a small sampling.

                       

                      The board from which we removed the part has never had power
                      applied, so the short is not the result of a power supply voltage
                      being too high or in the wrong sequence.

                       


                      Rev #   Serial  PCH part markings
                      Rev 2   115     SR179   11E406C086      MD420160A04158  G31426 01 ERJ   has short
                      Rev 1   107     SR179   11E406C086      MD420160A04149  G31426 01 ELN   good
                      Rev 0   101     SR179   11E406C086      MD420160A04962  G31426 01 EEP   good
                      Loose           SR179   11V5518066      N1551066A05345  G31426 01 YOK12 No short on VCCASW
                      Part.

                       

                      I'll look into the source of these parts.  Also, based on the above marking
                      information, are these all 82C226 devices?

                       

                      Thanks, Paul.