Crystal or oscillator for 48MHz circuit

Discussion in 'Embedded Systems and Microcontrollers' started by Louise, Dec 11, 2010.

  1. Louise

    Thread Starter New Member

    Jan 17, 2010
    13
    1
    Hi! A quick question hoping for a quick answer . . . I need to provide 48MHz to facilitate clocking for my AT89C5131 USB interface project. I must admit almost complete ignorance regarding the difference between using an oscillator and a crystal. Can anyone point me in the right direction, please?
     
  2. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,884
    1,002
    An Xtal is a component of an osc. You can also have an RC osc too. Check your datasheet. Probably all you need to supply is the xtal and a couple of caps and a resistor.
     
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  3. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    Unless you plan on using the 'clock' source for something else, a crystal, along with the required capacitors are sufficient.

    You may want to ask yourself, should I use a crystal or a ceramic resonator, which is typically much smaller.
     
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  4. bertus

    Administrator

    Apr 5, 2008
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