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Update README.md
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SpenceKonde authored Apr 17, 2020
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Expand Up @@ -135,7 +135,7 @@ The 3216,1616,816,416,3217,1617 and 817 have two additional PWM pins driven by T
In versions prior to 1.1.7, reconfiguting the TCA0's prescaler adversely effected tone and servo functionality. This is no longer the case.

### NeoPixel (WS2812) support
The usual NeoPixel (WS2812) libraries have problems on these parts. This core includes two libraries for this, both of which are tightly based on the Adafruit_NeoPixel library. See the [tinyNeoPixel documentation](megaavr/extras/tinyNeoPixel.md) and included examples for more information.
The usual NeoPixel (WS2812) libraries have problems on these parts. This core includes two libraries for this, both of which are tightly based on the Adafruit_NeoPixel library. See the [tinyNeoPixel documentation](megaavr/extras/tinyNeoPixel.md) and included examples for more information. As of 2.0.1, these libraries are split into three versions specific to the part to eliminate the use of an additional submenu option.

### Tone Support
Support for tone() is provided on all parts using TCB0, unless TCB1 is present and TCB0 is set as millis source. This is like the standard tone() function; it does not support use of the hardware output compare to generate tones. See caveats below if using TCB0 or TCB1 for millis/micros settings.
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This core *always* uses Link Time Optimization to reduce flash usage - all versions of the compiler which support the 0-series and 1-series ATtiny parts also support LTO, so there is no need to make it optional as was done with ATtinyCore.

### Identifying menu options within sketch
It is often useful to identify what options are selected on the menus from within the sketch; this is particularly useful for verifying that you have selected the options you wrote the sketch for when you open it. See the example below.
It is often useful to identify what options are selected on the menus from within the sketch; this is particularly useful for verifying that you have selected the options you wrote the sketch for when you open it; however, note that as of 2.0.1, almost all of these options have been removed except for the millis timer option.

##### Millis timer
The option used for the millis/micros timekeeping is given by a define of the form USE_MILLIS_TIMERxx. Possible options are:
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