Voltage Settings of Digital Discovery WaveForms

[A-M]

I want setup voltages 1.8V of three ports, and 3.3V of one ports.

Can we set upper condition?

[attila]

Hi @A-M

No. The adjustable DIO voltage 1.2-3.3V is the same for all IOs.
If you are using these only as inputs, you can set it to 1.8V The ~0.8V logic threshold should be good for 1.8-3.3V signals.
For outputs, depending on your requirements:
- you could set it to 3.3V and use OD output for 1.8V signals with external pullup
- or create resistive voltage divider for 1.8V
- or use external level shifter/translator 

[A-M]

Thank you for reply.

I have another question.

Can we use Digital Discovery(s) in sync ? And one for 1.8V output, the other for 3.3V output.

[attila]

Hi @A-M

You could synchronize them using the same trigger signal. At high frequency analysis you may notice the jitter between the independent oscillators of the devices.