Merge pull request #1452 from arduino/karlsoderby/pwm-r4-boards

[UNO R4 WiFi + Minima] Updates to PWM section

Author: karlsoderby

content/hardware/02.hero/boards/uno-r4-minima/tutorials/cheat-sheet/cheat-sheet.md

@@ -169,6 +169,12 @@ You may use them as analog output pins with the function:
 analogWrite(pin, value);
 ```
 
+By default, the resolution is 8 bit (0-255), You can use `analogWriteResolution()` to change this, supporting up to 12 bit (0-4096) resolution.
+
+```arduino
+analogWriteResolution(resolution);
+```
+
 ### Digital Pins
 
 The UNO R4 Minima features a total of digital 14 pins. Though some of them serve another purpose and shouldn't be used for GPIO if you have other pins available.

content/hardware/02.hero/boards/uno-r4-wifi/tutorials/cheat-sheet/cheat-sheet.md

@@ -197,7 +197,13 @@ You may use them as analog output pins with the function:
 analogWrite(pin, value);
 ```
 
-**Please Note:** the following pins are PWM capable but may interfere with other functionalities of the UNO R4 WiFi board. When writing library functions, please do not use this as they are not officially supported PWM pins. 
+By default, the resolution is 8 bit (0-255), You can use `analogWriteResolution()` to change this, supporting up to 12 bit (0-4096) resolution.
+
+```arduino
+analogWriteResolution(resolution);
+```
+
+Please note that the following pins are PWM capable but may interfere with other functionalities of the UNO R4 WiFi board. When writing library functions, please do not use this as they are not officially supported PWM pins. 
 
 | Pin       | RA4M1 | Timer   |
 | --------- | ----- | ------- |