Re: Контроллер на базе Arduino Mega 2560 + 3.2" TFT Touch LCD ===www.aquaforum.ua===
Цитата:
Допис від sae74
Я что программист Ардуино? %)
А что я? )))
Цитата:
200 kHz and 4096 levels requires an 819.2 MHz clock rate.
20 kHz would require 81.92 MHz.
With the Arduino's 16 MHz clock you get less than 4 kHz PWM with 4096 levels.
I think you will need external hardware like the TLC5940. It has 16 channels of 12-bit PWM. Unfortunately the greyscale clock can only go up to 30 MHz so you won't get even 10 kHz PWM out of it. Similarly the LT8500 can only handle a 25 MHz clock.
You might need to design custom hardware with a 1 GHz clock. Emitter Coupled Logic should be fast enough.
ON Semiconductor makes the MC10E016: 5V ECL 8-Bit Synchronous Binary Up Counter. Hook two together to get a 16-bit counter. Then use a 12-bit compare for the PWM output and a register you can load. ON Semi also makes the MC10E166: 5V ECL 9-Bit Magnitude Comparator. Two of those and some external logic should allow you to do a 12-bit comparison.
Вот чего нашел, на сколько я понял, штатными средствами платформы, это не достижима, нужна какая то специательная микруха MC10E166
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