11 Replies Latest reply: Jul 9, 2012 6:25 PM by mwaughex RSS

    Problem Powering On SCC


      Just noticed this today.


      I telnet into the BMC.

      And issue power on.


      Then I get :


      POWER ON


      Switching on the board.

      Initializing OPVRs

      Downloading FPGA bitstream

      SelectMap: Processing bitstream file "/mnt/flash4/rl_20110624_ab.bit".

                 Filesize is 3889967 bytes.


      Error: 3V3 SCC did not reach level. Shutting down!


      Switching off the board.



      If I try to issue power on again all i get this time is:


      Switching on the board.

      Error: Board went off with either OC or OV triggered!

             Won't do a restart!



      I tried pressing the reset button on the front of the SCC but that just starts this over at the first error.

      Any suggestions?

        • 1. Re: Problem Powering On SCC

          You may also want to check the LED lights RockyLake board.  The OV or OC are probably lighted Red.

          Also posting the results from:

          sccBmc -c status

          might prove insightful even with the chip powered off.


          This is not a common error.  I have only seen this around three times.


          Do you know if any user has loaded a different bitstream?  I have had this type of strangeness when the bitstream does not match the sccKit.


          I have also had a bad chip that caused this error.  Has the chip been removed lately?  A new Rock Creek chip installed?


          Once the power supply in the SCC had failed.







          • 2. Re: Problem Powering On SCC

            Thanks for the quick response!


            The OV  light is red.

            Here is the printout from the BMC status:

            INFO: Welcome to sccBmc 1.4.2 (build date Dec 20 2011 - 14:33:38)...

            INFO: Result of BMC command "status":

            I²C access is switched to BMC

            Power Status = 0x8F3D, OFF



            Standby supplies:

              5V0PWR:    5.025 V (Primary)

              1V8SB:     1.804 V (Secondary)

              3V3PWR:    3.260 V     -"-



            Primary supplies:

              3V3IN:     0.000 V

              5V0IN:     0.548 V

              12V0R1:    0.013 V

              12V0R2:    0.013 V



            Secondary supplies:

              1V0:       0.000 V    0.030 A

              1V1VCCA:   0.000 V    0.020 A

              1V1VCCT:   0.000 V    0.020 A

              1V5:       0.000 V    0.101 A

              1V65:      0.002 V

              1V65ADJ:   0.000 V

              1V8PHY:    0.000 V

              2V5:       0.136 V

              3V3:       1.000 V    0.020 A

              3V3SCC:    0.196 V    0.297 A



            Tertiary supplies:

              OPVR VCC0: 0.0019 V

              OPVR VCC1: 0.0003 V

              OPVR VCC2: 0.0054 V

              OPVR VCC3: 0.0003 V

              OPVR VCC4: 0.0009 V

              OPVR VCC5: 0.0023 V

              OPVR VCC7: 0.0007 V




              Board:      25 °C

              FPGA:       23 °C



            Fan speed:

              FPGA:       155 RPM (Needs real conversion to RPM!)

              SCC:        101 RPM

            1) The default bitstream is loaded I believe it is named "rl_20110624_ab.bit"

            2) The chip has never been removed since the scc system was shipped to us. It was working great even earlier today.

            3) I have not fully checked the power supply but besides for this issue it appears to be working... Even though I have an account on bugzilla I can't see that bug for some reason...


            You are not authorized to access bug #81.

            Thanks again for your quick response!

            • 3. Re: Problem Powering On SCC

              This is strange it just started to happen.

              It looks like the sccKit was upgraded to 1.4.2 recently ?

              This makes me wonder about the bitstream.

              It is difficult to tell if the bitstream is correct on the SCC since it has the same name and size as sccKit

              You may want to run the install script again.  Making sure that the
              /opt/sccKit/ file has been incremented.

              Also make sure you are using sccKit


              Lastly, besides the sccKit upgrade, has anything out of the ordinary happened?  A power outage in the building?  CPU replacement?  The system moved to a different location?

              • 4. Re: Problem Powering On SCC

                Nothing out of the ordinary. No power outages / moves / etc..  Upgraded to just a few days ago from 1.4.2 seemed to be working well the past few days until this happened.


                I will try reinstalling incase that may help somehow, and I will check the power supply later.


                Any other ideas?

                • 5. Re: Problem Powering On SCC

                  Well if it was working fine after the upgrade, I doubt reinstalling the bitstream will help.  But worth a try:


                  The recommendation on another bug was to try a cold boot on both the SCC and MCPC.


                  If those options do not fix the problem.  Please fill out a bug on:


                  Also in the bug reference this posting.

                  I will make sure IBW gets copied on the bug.

                  IBW may have another idea.


                  I have a feeling it is either a bad CPU or SCC powersupply.  Once the bug is filed, we can make a plan of action.


                  • 6. Re: Problem Powering On SCC



                    this error message "Error: 3V3 SCC did not reach level. Shutting down!\r\n" is generated, when the 3V3 SCC rail does not reach 95% within 3.5 sec. There is a very high probability, that your SCC chip is drawing to much power. And the hard power off switching triggers the OV detection.

                    Besides, what are your power settings for the SCC? Please, use the SET command without any arguments to display the voltage trimming settings and send me those results.


                    Best Regards,

                    Carsten Wille

                    • 7. Re: Problem Powering On SCC

                      Here is the output of the SET command:



                      Current settings are:



                      Default FPGA bitstream: /mnt/flash4/rl_20110624_ab.bit



                      Associated MAC addresses:

                      - Port A 0x000000000001

                      - Port B 0x000000000002

                      - Port C 0x000000000003

                      - Port D 0x000000000004



                      Target trimming voltages:

                      0 1.100 V

                      1 1.100 V

                      2 1.100 V

                      3 1.100 V

                      4 1.100 V

                      5 1.100 V

                      6 1.100 V

                      7 1.100 V

                      • 8. Re: Problem Powering On SCC



                        Ok, trimming voltages are as expected within normal range.

                        Then I fear, your SCC chip is broken. To test this, let's make sure the board itself isn't:



                        - The pins of the SCC socket are extrem fragile.

                        - Keep the pins clear of any thermal grease.

                        - Tighten or loose the heatsink screws by turning them only a few rounds every time.



                        - Remove the power cable and wait until all LEDs on the board are off.

                        - Disconnect the fan of the heatsink from the board.

                        - Remove the heat sink.

                        - Remove the SCC chip from the socket.

                        - Reconnect the power cable.

                        - Telnet into the BMC and execute the command "POWER TEST". This is intended to be used ONLY with an empty SCC socket!

                        - Use the "STATUS" command to display all voltages.


                        Except for the tertiary voltages, everything should be within a reasonable range. If the 3V3 SCC is now stable at 3.3V, the SCC chips internal power regulators have been blown. If the 3V3 SCC rail is not at 3.3V +/- 5%, the board is broken.


                        - Use "POWER OFF" to shutdown.

                        - Before mouting the heatsink, make sure, there is enough thermal grease (a small drop will do).




                        • 9. Re: Problem Powering On SCC

                          Here are the results from the power test:


                          ]>POWER TEST

                          Done! Power is on in testmode.


                          I�C access is switched to BMC

                          Power Status = 0xCF3F, TEST



                          Standby supplies:

                            5V0PWR:    5.017 V (Primary)

                            1V8SB:     1.804 V (Secondary)

                            3V3PWR:    3.256 V     -"-



                          Primary supplies:

                            3V3IN:     3.380 V

                            5V0IN:     5.047 V

                            12V0R1:    12.078 V

                            12V0R2:    12.065 V



                          Secondary supplies:

                            1V0:       1.024 V    0.450 A

                            1V1VCCA:   1.114 V    0.020 A

                            1V1VCCT:   1.114 V    0.020 A

                            1V5:       1.528 V    0.457 A

                            1V65:      1.648 V

                            1V65ADJ:   1.652 V

                            1V8PHY:    1.800 V

                            2V5:       2.480 V

                            3V3:       3.332 V    0.930 A

                            3V3SCC:    3.300 V    0.297 A



                          Tertiary supplies:

                            OPVR VCC0: 0.0000 V

                            OPVR VCC1: 0.0000 V

                            OPVR VCC2: 0.0000 V

                            OPVR VCC3: 0.0000 V

                            OPVR VCC4: 0.0000 V

                            OPVR VCC5: 0.0000 V

                            OPVR VCC7: 0.0000 V




                            Board:      23 �C

                            FPGA:       21 �C



                          Fan speed:

                            FPGA:        85 RPM (Needs real conversion to RPM!)

                            SCC:        171 RPM




                            FPGA status: 0xEF

                            Lane Good LED is off

                            in transition

                            CPLD status: 0x05

                            PLL is not locked.

                            PLL lock lost is cleared.



                          The 3V3SCC looks good so your saying that means the chips power regulator is broken.

                          • 10. Re: Problem Powering On SCC



                            Looks, like your SCC chip is for the bin. That does happen sometimes. You should clarify with mwaughex, how to get a replacement.


                            Once you have replaced the chip, do not power up the board the usual way with "POWER ON" or the power button on the front panel. That will blow your new chip. Just turn on the ATX-power supply, telnet to the BMC and use the command "POWER AUTOTRIM" to start the calibration process. When the BMC reports success at the end of the calibration, you can use the system as before.




                            • 11. Re: Problem Powering On SCC

                              John-Nicholas Furst has reported the replacement SCC chip has solved the problem.


                              Thanks Carsten Wille for the POWER TEST information.  I too have found this useful.