I'm trying to write my first and a simple program on a pic16LF84, but I'm confused as to whether an external oscillator is required or optional.
I'm reading a pdf called "Book: PIC Microcontrollers Programming in C" and it states:
Even though the microcontroller has a built-in oscillator, it cannot operate without external components which stabilize its operation and determine its frequency (operating speed of the microcontroller). Depending on elements in use as well as their frequencies, the oscillator can be run in four different modes:
· LP - Low Power Crystal;
· XT - Crystal / Resonator;
· HS - High speed Crystal / Resonator; and
· RC - Resistor / Capacitor.
^It's actually referring to the pic16f887.
I just want to make a simple LED blinker and ADC, so do I need an external oscillator?