USB-8452 I2C configuration

[ADamI]

Hi, is there a way to change the I2C clock (SCL) duty cycle of the USB-8452? I am getting 70% duty cycle but I need ~30%  for sensor evaluation over I2C.

Thanks.  

[cweeks12]

Hi ADaml,

There is no way to explicitly set the duty cycle of the clock, all that is configurable, even in the scripting API, is the clock rate through property nodes. The question is, why do you need that low of a duty cycle for your clock? According to this: http://www.ni.com/white-paper/9115/en/, the slaves should stretch the clock if they need more time before they're ready for the master to transmit again.

[ADamI]

Thanks for the answer. This is for characterization purpose to meet the I2C specs in: 

 https://www.analog.com/en/technical-articles/i2c-timing-definition-and-specification-guide-part-2.ht...

I found out that the NI-6556 can do the job. 

Thank you,