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PSoC 3 Pins component has a Vref option:
This then requires an external Vref, which can be set to 0.256 V:
But the datasheet doesn't seem to list the "Input voltage low threshold" for this configuration? What are the margins of error on this threshold?
Solved! Go to Solution.
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PSoC 3
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PSoC 3 Architecture
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Hi,
"If I want a more accurate threshold without so much variability, should I use a comparator?"
Yes for measuring voltage more than 0.256 you can use a comparator.
Please refer the below table for max Vinref value
Regards
Alakananda
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Hi,
Can you please refer to VIL in the below table.
Regards
Alakananda
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Ok, but which one applies to the Vref setting? Is that considered "differential mode"? So the threshold would actually have a range of 0.256±0.2 V? What if Vref*0.5 is selected? The threshold would then be 0.128±0.2, which would drop below 0 V and not work?
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If I want a more accurate threshold without so much variability, should I use a comparator?
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Hi,
"If I want a more accurate threshold without so much variability, should I use a comparator?"
Yes for measuring voltage more than 0.256 you can use a comparator.
Please refer the below table for max Vinref value
Regards
Alakananda
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Which document is that from?
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Hi,
It is from PSoC® 3: CY8C38 Family Datasheet.
Pg no 82 section 11.4.2
Regards
Alakananda