I have a PIC16LF1828 running of the internal 2MHz Clock while awake and off a 32kHz crystal when in sleep for potentially many hours.
When the unit wakes up it uses the H/W RS232 running at 9600 to drive a RF module that is ~ 15mm away. The RF Module has a crystal oscillator.
It seems to work fine on the 6 units I have tried, one of which has been tested to 70 Deg C waking up every 30Secs.
The unit runs from a battery and the power consumption is required to be very low when in sleep currently its < 10uA
The question is will the H/W RS2322 run reliably from the internal 2Mhz clock ?
I can easily increase the CLK speed to 4MHz if that would help.
Is there any easy way of synchronising the internal clock to the 32Khz Crystal ?
There does not seem to be an option for adding a second crystal ?
Is there a better low power way of handling the clocks.
Thanks
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I have a PIC16LF1828 running of the internal 2MHz Clock while awake and off a 32kHz crystal when in sleep for potentially many hours.
When the unit wakes up it uses the H/W RS232 running at 9600 to drive a RF module that is ~ 15mm away. The RF Module has a crystal oscillator.
It seems to work fine on the 6 units I have tried, one of which has been tested to 70 Deg C waking up every 30Secs.
The unit runs from a battery and the power consumption is required to be very low when in sleep currently its < 10uA
The question is will the H/W RS2322 run reliably from the internal 2Mhz clock ?
I can easily increase the CLK speed to 4MHz if that would help.
Is there any easy way of synchronising the internal clock to the 32Khz Crystal ?
There does not seem to be an option for adding a second crystal ?
Is there a better low power way of handling the clocks.
Thanks