Adding multiple PIR sensors to the PSoC Analog Coprocessor

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GeIo_1586191
Level 4
Level 4
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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. 

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Bob_Marlowe
Level 10
Level 10
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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

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OK thanks.

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GeIo_1586191
Level 4
Level 4
50 replies posted 25 replies posted 10 replies posted

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.

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Bob_Marlowe
Level 10
Level 10
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Why is that

   

Take it as it is

   

 

   

Bob

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