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You are here: Home / Topics / How to Use Internal and External Effectively

How to Use Internal and External Effectively

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Miscellaneous › Others › How to Use Internal and External Effectively

  • This topic has 1 reply, 2 voices, and was last updated 8 years, 6 months ago by GANEEV SINGH.
Viewing 2 posts - 1 through 2 (of 2 total)
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  • March 30, 2015 at 9:37 am #3588
    Allen
    Participant

    Hi,
    I started to do a coding for Microcontroller, I have some following doubts,

    1) Every Microcontroller has Clock(Which will vary controller by controller). Take it for example,
    I am using a Controller which is having 32MhZ. This frequency can be changed for 16MhZ also. But how can i change this.
    Is there any Hardware register to achieve this.
    2) If my process is multi threading, is it possible to set a different frequency for two running thread.

    3) Running RTC
    i) I have seen that, RTC will run only on External Crystal. Why it will not run internal(Controller Clock)?
    ii) I read some where, if want to take a reference of External Clock, Need to access from a GPIO. Is this Correct,
    If Yes, how can i reference through GPIO. If No, then what should i do in program to access External Crystal.

     

     

    December 16, 2016 at 5:00 pm #14278
    GANEEV SINGH
    Participant

    Hi Allen

    1)You can change the operating frequency using various softwares like SinaProg and all; what they really do is, they make some changes inside microcontroller's fuse bits.

    2) Yes according to me you can run a multi-threaded system with different frequencies.

    3) RTCs do not have their own clock; they either depend on external crystals or they acquire the clock from a microcontroller operating it.

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