(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)F65/66K40 devices have three comparators (C1/C2/C3).

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