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Oct 21, 2020
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Original file line number Diff line number Diff line change
Expand Up @@ -16,11 +16,12 @@ subCategories: [ "Zero, Due & MKR Family" ]

[float]
=== Description
analogReadResolution() is an extension of the Analog API for the Arduino Due, Zero and MKR Family.
analogReadResolution() is an extension of the Analog API for the Zero, Due, MKR family, Nano 33 (BLE and IoT) and Portenta.

Sets the size (in bits) of the value returned by `analogRead()`. It defaults to 10 bits (returns values between 0-1023) for backward compatibility with AVR based boards.

The *Due, Zero and MKR Family* boards have 12-bit ADC capabilities that can be accessed by changing the resolution to 12. This will return values from `analogRead()` between 0 and 4095.
The *Zero, Due, MKR family and Nano 33 (BLE and IoT)* boards have 12-bit ADC capabilities that can be accessed by changing the resolution to 12. This will return values from `analogRead()` between 0 and 4095. +
The *Portenta H7* has a 16 bit ADC, which will allow values between 0 and 65535.
[%hardbreaks]


Expand All @@ -31,7 +32,7 @@ The *Due, Zero and MKR Family* boards have 12-bit ADC capabilities that can be a

[float]
=== Parameters
`bits`: determines the resolution (in bits) of the value returned by the `analogRead()` function. You can set this between 1 and 32. You can set resolutions higher than 12 but values returned by `analogRead()` will suffer approximation. See the note below for details.
`bits`: determines the resolution (in bits) of the value returned by the `analogRead()` function. You can set this between 1 and 32. You can set resolutions higher than the supported 12 or 16 bits, but values returned by `analogRead()` will suffer approximation. See the note below for details.


[float]
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