Introduction

This application note serves as an example on how to set up and use the Atmel® AVR® On-chip Analog Comparator. The following program examples are given in the assembly file “avr200.asm”:

• Detect a positive edge on the comparator output by polling the ACO-bit in the Analog Comparator Control and Status Register – ACSR.
• Detect a positive edge on the comparator output by polling the Analog Comparator Interrupt Flag – ACI in ACSR.
• Initialize interrupt on comparator output toggle. An interrupt routine which increments a 16-bit counter each time it is executed is given as an example.