Atmel ATmega32M1 User Manual

264
7647H–AVR–03/12
Atmel ATmega16/32/64/M1/C1
20.4 Analog Comparator Register Description
Each analog comparator has its own control register.
A dedicated register has been designed to consign the outputs and the flags of the 4 analog
comparators.
20.4.1 Analog Comparator 0 Control Register – AC0CON
• Bit 7– AC0EN: Analog Comparator 0 Enable Bit
Set this bit to enable the analog comparator 0.
Clear this bit to disable the analog comparator 0.
• Bit 6– AC0IE: Analog Comparator 0 Interrupt Enable bit
Set this bit to enable the analog comparator 0 interrupt.
Clear this bit to disable the analog comparator 0 interrupt.
• Bit 5, 4– AC0IS1, AC0IS0: Analog Comparator 0 Interrupt Select bit
These 2 bits determine the sensitivity of the interrupt trigger.
The different setting are shown in Table 18-7.
• Bit 3 – ACCKSEL: Analog Comparator Clock Select
Set this bit to use the 16MHz PLL output as comparator clock.
Clear this bit to use the CLK
IO
as comparator clock.
• Bit 2, 1, 0– AC0M2, AC0M1, AC0M0: Analog Comparator 0 Multiplexer register
These 3 bits determine the input of the negative input of the analog comparator.
The different setting are shown in Table 20-2.
Bit 76543210
AC0EN AC0IE AC0IS1 AC0IS0 ACCKSEL AC0M2 AC0M1 AC0M0 AC0CON
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value 00000000
Table 20-1. Interrupt sensitivity selection
AC0IS1 AC0IS0 Description
0 0 Comparator Interrupt on output toggle
01Reserved
1 0 Comparator interrupt on output falling edge
1 1 Comparator interrupt on output rising edge

Atmel ATmega32M1 Specifications

General

Brand	Atmel
Model	ATmega32M1
Category	Microcontrollers
Language	English