Sep 04, 2016
08:05 AM
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Sep 04, 2016
08:05 AM
For the SAR ADC example, where an ADC is used with an analog input pin, just a simple question:
Why do we have to assign a physical pin to both the ADC and the analog input pin? Doesn't the ADC "not" need a pin, because we are connecting it to the analog pin? It would seem to me that the connection between the ADC and the pin would be internal...
-RT
Edit: just for clarity sake, here's what the lab 4 manual says:
map the “ADC_SAR_Seq_1:Bypass” pin to P1[7], and “Pin_1” to P2[0]
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Sep 04, 2016
10:29 AM
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Sep 04, 2016
10:29 AM
The "Bypass" pin together with a capacitor of ~1µF stabilizes the internal reference voltage. The analog input pin for the ADC is (within limits) to be chosen freely.
Bob
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