Verifying I2C and SPI Timing Characteristics at 5.5V to 1.8V

[Tangent]

Hi,

I'm trying to create a test set-up which will allow me to characterize the timing parameters for I2C and SPI buses on a part which will operate from 5.5V down to 1.8V. I need to be able to characterize or at least test the specified timing limits across the full voltage range.

Can anyone recommend some equipment that can be used to achieve this ?

Thanks,

Tangent

[alpha1]

Hi Tangent,

The NI USB-8451 is able to work with both the I2C and SPI buses, but it would not be able to characterise the timing parameters. I think you'll need a High Speed Digital I/O card (HSDIO) or an FPGA card, but it would have quite a bit of programming involved.

It would be best to talk to your local Sales Representative, who would be able to assist you further. Depending on your location, the following link should show you the appropriate contact details: http://sine.ni.com/apps/utf8/nicc.call_me.

[Keith.Shapiro · Accepted solution]

Hi Tangent,

Imtiaz is right.  The 655x line of HSDIO cards supports the voltage families you require and has very good timing resolution.  Additionally, there are I2C libraries that we have available for the 655x here:  http://zone.ni.com/devzone/cda/epd/p/id/6080

For more information on the HSDIO cards, check here:  http://www.ni.com/highspeeddigitalio/

Thanks, and best of luck!

Keith Shapiro

National Instruments R&D