PSoC 4 MCU

[vegan_electron]

Hello,

i would kindly ask if it's possible to switch the IDAC's polarity? The configuration in the IDE is fixed? We would control the configuration by software API as needed.

So is this possible?

Thank you and kind regards,

Daniel

[Len_CONSULTRON]

Daniel,

It's simple.  There is a Polarity configuration setting.  

When you set to Negative polarity make sure the load is connected to allow the current to flow from a voltage source (in the example below: from Vdd).

When you set to Positive polarity make sure the load is connected to allow the current to flow to GND (in the example below: to GND).  In this case, the Voltage source is VDDA.  This may be a limiting factor in your design.

Len

[Hari · Accepted solution]

Hi DaRi_1526611​

To change the IDAC polarity during run-time, you will have to perform the register writes manually. Attaching a sample project where the IDAC configuration is switched from Sink to source based on a button press.

Thanks,
Hari

[vegan_electron]

Thank you a lot guys! This information helps me a lot.

Thank you very much, stay safe,

Daniel