Hi, what is max value of cyrstal value support in c8051f020? is their any limitation of crystal value in the controller? what are the factors considering of choosing the crystal oscillator?please help this matter?
Did you notice something? The first question was a question that should be answered by the datasheet.
But since you did ask this question here, people decided to ignore your second question. Why? Because people don't link to be private tutors to students who do not open their school books and do their homework.
If you instead post a question where you summarices what facts you have found in the datasheet, and what conclusions you did from these facts and then continue with things you do not understand or think is missing in the datasheet, then you have a way better chance of someone caring about that second question.
what are the factors considering of choosing the crystal oscillator? for EMI as slow as you can get by with for UART a frequency (e.g. 11.0592) that makes the baudrates precise.
Erik