PSoC 4 MCU

[GeIo_1586191]

I've just started reviewing the PSoC Analog Coprocessor as want to use it with a pyroelectric sensor for motion detection, but wondered whether I can attach multiple PIR sensors to the chip directly as it appears that the CY8C4Axx chips have multiple opamps. If so what is the maximum number of sensors I can attach and what is the limiting factor (e.g. number of opamps or some other constraint on the chipset).

   

Thanks. 

[JoMe_264151]

Welcome in the forum.

   

When you built the project for 1 sensor you can estimate for yourself: on the very right hand side of the Creator 4.0 window is a tab named "Resource Meter". Here you can see how many resources your current project consumes and how many remain.

       

Bob

[GeIo_1586191]

OK thanks.

[GeIo_1586191]

That Resource Meter side tab is very helpful (never spotted that before). Looks like the 1.2V Vref generator needs to use an OpAmp resource too. So 3 out of 4 already used. Why is that.

[JoMe_264151]

Why is that

   

Take it as it is

       

Bob