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If your cpu can run @ say 16Mhz then you can use a 16Mhz crystal. Depending on CPU and depending on use you might choose a different value. Some microcontrollers
for example the 8051 will give you more baud rates for the serial port if you use a 11.032(if I remember correctly) Mhz crystal instead of a 12 Mhz
Actually i am making project on 68hc05j1a motorola controller.
it uses 2MHZ cpu so what crystal should i choose??
cant i use normally available crystal of 11MHZ ??
You can only use 2Mhz or slower crystal. Even though it might run with a slightly faster crystal I doubt if it would work with an 11Mhz crystal. If you cannot get the correct value, what about using it with an RC oscillator, I think it just requires a single resistor. Will not be as accurate as a crystal but will work ok for most applications
You can only use 2Mhz or slower crystal. Even though it might run with a slightly faster crystal I doubt if it would work with an 11Mhz crystal. If you cannot get the correct value, what about using it with an RC oscillator, I think it just requires a single resistor. Will not be as accurate as a crystal but will work ok for most applications
my problem is solved
i have ask instructor and he agrees to demonstrate on evaluation kit
so i dont need oscillator
anyway thanks for your help
see i have also thank you
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