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B4621A, default conf 16962 DDR3 x16 32bit ?

Question asked by Alx on Jan 6, 2016
Latest reply on Jan 20, 2016 by algoss

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B4621A DDR bus decoder installation provides some default configurations for 16962A board
and BGA interposers.

Is it available a default config for DDR3, x16 32bit (similar to DDR2, x16 32bit, which is available) ???
Which BGA interposers have to be used for 32bit and how many 16962A boards (2 or 3) ??
DDR3 - 1600.

I found, there is only 16962A, DDR3 x16 16bit default config is included to B4621A setup.

Thank you!

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algoss Jan 6, 2016 5:54 AM
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Are you using the most recent version of the LA SW?

Did you use the DDR Setup Assistant?

If you use that, and answer the questions correctly, it should find the correct configuration file.

If you don't have that available, then you haven't loaded all of the necessary tools?

Al

Disclaimer: For more reliable response times, you should consider calling your local Keysight Technical Call Center. The Keysight Forums are monitored on an "as available" basis, and aren't necessarily the fastest way to get technical questions answered.
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- Alx @ algoss on Jan 8, 2016 5:20 AM
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  Sure, all the latest SW components installed, you can reference to the picture attached
  and see 16962 DDR3 x16 32bit config file missing...
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  - DDR3_configs.PNG22.4 KB
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  - algoss @ Alx on Jan 11, 2016 3:42 AM
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    OK, I checked. There is no 32bit x16 configuration, because that is not a standard setup which is directly supported by any of the HW sold by Keysight, or Futureplus. You will have to modify an existing 16bit configuration, adding the additional 16 bits.
    
    You never really answered my questions, so the above answer is not definitive.
    
    What version of LA SW are you running?
    
    Did you use the DDR Setup assistant?
    
    Have you loaded all of the DDR Tools from the Keysight website?
    
    Al
    
    Disclaimer: For more reliable response times, you should consider calling your local Keysight Technical Call Center. The Keysight Forums are monitored on an "as available" basis, and aren't necessarily the fastest way to get technical questions answered.
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    - Alx @ algoss on Jan 18, 2016 4:59 AM
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      my sw/hw config is as follows:
      LA SW v5.90, 16902B Win7 x64,
      B4621 decoder v5.90,
      16962 x 2, E5845A, DDR3 x16 32bit ( < 1867Mb/s).
      
      That is really strange why DDR2 x16 32bit is a standard config available for 16962 boards,
      and DDR3 x16 32bit is not... why so ?
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      - algoss @ Alx on Jan 20, 2016 8:23 AM
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        There is no standard scheme for connecting 2 x16 DDR3 chips to an analyzer in a x32 configuration. I have seen it done, using 2 interposers, or SoftTouch adapters. There may be other schemes which will work, as well. Because there's no standard scheme, there's no standard configuration file.
        
        Based on what you have told me, you may have an interposer (either W3631A or W3636A) on each of your 2 DDR3 chips. In a 16 bit configuration this interposer brings the Address, Command, and Data buses to the 2 analyzer cards. If you follow the standard connection, Address and Command go to one card, and the 16 bits of Data goes to the second card, from Pod A. The Data bus uses 32 channels, due to dual-sample mode.
        
        This leaves 32 channels available on the second card. You could extend this configuration by connecting Pod A of the second E5845A to Pod 3 of the second card. Then you could duplicate the channel mapping of Pods 1 and 2 into pods 3 and 4. Once that's done, you could save that configuration and use it to accomplish your measurement task.
        
        You might have to adjust the signal groupings on the Read and Write tabs of EyeScan, but, again, that could be saved into the configuration file for future use.
        
        Al
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B4621A, default conf 16962 DDR3 x16 32bit ?

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