We found the ATtiny816 to be a capable device, and it was easy to work with once we had figured out the quirks of the compiler. But we were a bit disappointed that we could not think of good ways to demonstrate the other features of the microcontroller, such as the CCL or Event System. The 20MHz internal oscillator mode is rated to work down to around 4.5 V supply voltage, but we did some tests with a 3.3 V supply and found most things seemed to work adequately. But the performance does degrade slightly. For example, the ADC results appeared to drift more than with a 5 V supply. Another ATtiny series chip (ATtiny85), has even had a USB stack ported to it, so if the same can be done for the ATtiny816, then we can expect some interesting projects to appear. The small amount of RAM and Flash memory appears to be limiting, but we expect this microcontroller will make a great peripheral IC to another micro, and we look forward to using it for other projects.
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