PIC16F73 programming

user_19503639 0
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enter image description hereI am trying to program pic16f73 microcontroller, but in configuration bit setting there are no options to select internal or external clock.

enter image description here Can any one help me to find the solution.

microchip pic
2 Answers

The PIC16F73 don't have an internal oscillator:
The PIC16F7X can be operated in four different oscillator modes. The user can program two configuration bits (FOSC1 and FOSC0) to select one of these four modes:

  • LP Low Power Crystal
  • XT Crystal/Resonator
  • HS High Speed Crystal/Resonator
  • RC Resistor/Capacito
user_90612640

From the datasheet, it looks like an external clock is required for PIC16F7X.

If you have a look at the datasheet Oscillator Configurations on the Configuration bits section (Page 91) there are four modes:

  • LP Low Power Crystal
  • XT Crystal/Resonator
  • HS High-Speed Crystal/Resonator
  • RC Resistor/Capacitor

On figure 12-1 of the datasheet, there is how to configure CRYSTAL/CERAMIC RESONATOR.

By table 12-2 of the datasheet, the HS mode is for crystal frequency >= 4MHz the XT mode is for <=4MHz and the LP is for <= 200 KHz.

So the configuration mode is dependent on the crystal resonator connected. For more details datasheet has them all.

user_154603980
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