Atmel ATmega32M1 User Manual

266
7647H–AVR–03/12
Atmel ATmega16/32/64/M1/C1
Clear this bit to disable this function. In this case, no connection between the Analog Compara-
tor and the input capture function exists.
• Bit 2, 1, 0– AC1M2, AC1M1, AC1M0: Analog Comparator 1 Multiplexer register
These 3 bits determine the input of the negative input of the analog comparator.
The different setting are shown in Table 20-4.
20.4.3 Analog Comparator 2 Control Register – AC2CON
• Bit 7– AC2EN: Analog Comparator 2 Enable Bit
Set this bit to enable the analog comparator 2.
Clear this bit to disable the analog comparator 2.
• Bit 6– AC2IE: Analog Comparator 2 Interrupt Enable bit
Set this bit to enable the analog comparator 2 interrupt.
Clear this bit to disable the analog comparator 2 interrupt.
• Bit 5, 4– AC2IS1, AC2IS0: Analog Comparator 2 Interrupt Select bit
These 2 bits determine the sensitivity of the interrupt trigger.
The different setting are shown in Table 18-7.
Bit 3 – Res: Reserved Bit
This bit is an unused bit in the ATmega16/32/64/M1/C1, and will always read as zero.
Table 20-4. Analog Comparator 1 negative input selection
AC1M2 AC1M1 AC1M0 Description
000“Vref”/6.40
001“Vref”/3.20
010“Vref”/2.13
011“Vref”/1.60
100Bandgap (1.1V)
101DAC result
110Analog Comparator Negative Input (ACMPM pin)
111Reserved
Bit 76543210
AC2EN AC2IE AC2IS1 AC2IS0 - AC2M2 AC2M1 AC2M0 AC2CON
Read/Write R/W R/W R/W R/W - R/W R/W R/W
Initial Value 00000000
Table 20-5. Interrupt sensitivity selection
AC2IS1 AC2IS0 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