• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 20 subscribers
  • Views 269 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Safety Factor definition

Florent Boico32
Prodigy 50 points

Hello, I have a question regarding the general definition of the safety factor of crystal oscillator circuits for microcontroller applications.

Is the safety factor measured when the oscillator fails to oscillate or when the oscillation amplitude is getting too low for the MCU to run?

For example I have a case where a built-in MCU oscillator circuit has a well defined oscillation of close to 1V p-p on its pin but yet too low to provide clock to the MCU.

Thank you

  • 0
    TI__Mastermind 26420 points
    Hey Florent,

    My understanding is that it's when the oscillator is no longer able to be successfully drive the MCU. It probably depends on the crystal characteristics on it this is a immediate failure or a steady drop in amplitude.

    This application about 32-kHz crystal Oscillators for MSP430 has more information on crystal safety factor: www.ti.com/.../slaa322d.pdf

    I'm not sure how this would apply to your built in circuit. Is this a MEMs based oscillator?

    Thanks,
    JD