33 CMP - Comparator Module

Comparators are used to interface analog circuits to a digital circuit by comparing two analog voltages and providing a digital indication of their relative magnitudes. Comparators are very useful mixed-signal building blocks because they provide analog functionality independent of program execution. The PIC18(L)F24/25K40 devices have two comparators (C1/C2).

The analog comparator module includes the following features:

• Programmable Input Selection
• Programmable Output Polarity
• Rising/Falling Output Edge Interrupts
• Wake-up from Sleep
• CWG Auto-Shutdown Source
• Selectable Voltage Reference
• ADC Auto-Trigger
• Odd Numbered Timers (Timer1, Timer3, etc.) Gate
• Even Numbered Timers (Timer2, Timer4, etc.) Reset
• CCP Capture Mode Input
• DSM Modulator Source
• Input and Window Signal-to-Signal Measurement Timer