Digital Discovery I2C

[arang]

Is there a way to change Rise/fall times, dutycycle, skew etc  using I2C Protocol viewer in Waveform?
 

[JColvin]

Hi @arang,

Not in the Protocol tool specifically, but you can adjust the drive strength, slew, and pull values of the IO pins either through the Supplies instrument or through the Settings -> Options -> DIOs tab.

I'm not certain what you mean by duty cycle specifically, but you can change both the System Clock frequency that the Digital Discovery uses at large though those same settings, or you can change the frequency of whatever protocol you are using through the (user typeable) dropdown within the Protocol tab of interest as well.

Let me know if you have any questions.

Thanks,
JColvin

[attila]

Hi @arang

Since the I2C is an open drain, the rise time is mostly determined by the pull-up resistor and the drive/slew of master and slave. This can be adjusted for DIOs of Digital Discovery, Analog Discovery 3...
The duty cycle is influenced by the combination of frequency and pull-up.

[arang]

Thanks and the DIO's configuration helps.