Hot!Looking for link to documentation for configuring secondary oscillator for PIC16F1619

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meyerjoh
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2018/10/26 16:28:49 (permalink)
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Looking for link to documentation for configuring secondary oscillator for PIC16F1619

Dear Experts,
 
I am hoping to use the timer 1 interrupt to wake a 8 bit PIC from sleep. It is my understanding that the secondary oscillator will continue oscillating through sleep. However, I have not been able to find any documentation on how the secondary oscillator is configured and/or enabled. Even the PIC16F1619 (for instance) only has four instances of the word "secondary", and none of them near any configuration information.
 
I'm sure that there has to be some information, perhaps in an application note somewhere!
 
Any help/advice would be much appreciated!
#1

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    qhb
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    Re: Looking for link to documentation for configuring secondary oscillator for PIC16F1619 2018/10/26 16:45:01 (permalink)
    +1 (1)
    I don't believe the PIC16F1619 has a secondary oscillator.
    The occasional use of the word "secondary" will be an accidental cut&paste from another datasheet.
    Your only alternative is to use the WDT to wake up from sleep.
     
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    DeutcheN
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    Re: Looking for link to documentation for configuring secondary oscillator for PIC16F1619 2018/10/28 22:38:25 (permalink)
    +1 (1)
     
    Section 22.7 of the datasheet describes the use of Timer1 during sleep in order to wake up the device.  The timer needs to run in async counter mode.
     
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    qhb
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    Re: Looking for link to documentation for configuring secondary oscillator for PIC16F1619 2018/10/28 22:39:36 (permalink)
    +1 (1)
    "asynch counter mode" means you need an external clock input.
    #4
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