You are here

Very simple question on SAR ADC example (PSOC 4 Lab 4) | Cypress Semiconductor

Very simple question on SAR ADC example (PSOC 4 Lab 4)

Summary: 1 Reply, Latest post by Bob Marlowe on 04 Sep 2016 10:29 AM PDT
Verified Answers: 1
Last post
Log in to post new comments.
BeefChickenPork's picture
User
8 posts

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]

user_1377889's picture
User
10400 posts

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

Log in to post new comments.