PXIe-6571 for memory testing (SRAM, DRAM, FLASH)

[Sruk]

Hi there guys,

I'm currently researching the possibilities of 6571 for the use in various RAM testing for a non-commerce University research project. I had success with writing and reading from the SRAM on various frequencies, even the Shmoo was doing a good job.

I'd like to ask a favor if some can share a idea how to implement standard r/w RAM test's in the Digital Pattern Editor (DPE). Those test could be: ZERO-ONE, CHEKERBOARD, and GALPAT. Please refer to the photos in the attachment.

The main issue for me is how to set the DPE automatically scan through a set of addresses in the available address space, i.e. from 0x0000 to 0xFFFF.?

If any additional description of what I'm trying to achieve is necessary to clarify this topic please feel free to ask.

Thx, bye!

[santo_13 · Accepted solution]

I don't think there is any feature on 6571 that would do that for you.

I would recommend creating a utility that does the following,

1. Prepare a simple pattern that does what you want for just one register, export it to digipatsrc (this becomes your template for each register operation)
2. Take in the list of addresses, write data, expected read data
3. Take in #1, replace appropriate locations with data you get from #2, keep on building a large flat pattern
4. Now you've a flat digitpat src file with all registers from #2 in the same pattern
5. You can compile the pattern from #4 and load it to 657x during initialize like any other pattern

You've to do this only once, so no dynamic generation is required.

In my experience, I typically get these checkerboard patterns generated using the VLSI design/verification tools like Cadence and use utilities to covert them from industry-standard pattern formats (WGL, STIL) into digipat.

You can also look into third-party tools to make it easy for you - https://www.ni.com/en-us/support/documentation/supplemental/16/supported-pattern-conversion-tools-wi...

[Sruk]

Santhosh, you are the best !!! 🙂

Thx a lot!

[Sruk]

Hi Santosh,

since I had the best solutions possible from you I'll continue with this thread. 🙂

So, I have two 6571 that I'd like to run from LabView. The thing is that with LV, I can make some tests run automatically. Is there any example how to configure basic set-up for two 6571 in LV.

Below is the single 6571 LV configuration. Since the pattern file shares pin's from both cards I'm not quite sure how to connect the second resource to work correctly.

Thanks!

[santo_13 · Accepted solution]

You just need to provide the instrument aliases as comma-separated in the resource name during initializing.

NI-Digital 19.0 and above supports multi-instrument sessions, this means the driver can treat multiple instruments as one large instrument provided they are in the same chassis and of the same model.

[Sruk]

🙂 I knew I'm asking the right man for this information.

Thank you!