Atmel ATmega32M1 User Manual

267
7647H–AVR–03/12
Atmel ATmega16/32/64/M1/C1
• Bit 2, 1, 0– AC2M2, AC2M1, AC2M0: Analog Comparator 2 Multiplexer register
These 3 bits determine the input of the negative input of the analog comparator.
The different setting are shown in Table 20-6.
20.4.4 Analog Comparator 3 Control Register – AC3CON
• Bit 7– AC3EN: Analog Comparator 3 Enable Bit
Set this bit to enable the analog comparator 3.
Clear this bit to disable the analog comparator 3.
• Bit 6– AC3IE: Analog Comparator 3 Interrupt Enable bit
Set this bit to enable the analog comparator 3 interrupt.
Clear this bit to disable the analog comparator 3 interrupt.
• Bit 5, 4– AC3IS1, AC3IS0: Analog Comparator 3 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.
• Bit 2, 1, 0– AC3M2, AC3M1, AC3M0: Analog Comparator 3 Multiplexer register
These 3 bits determine the input of the negative input of the analog comparator.
The different setting are shown in Table 20-6.
Table 20-6. Analog Comparator 2 negative input selection
AC2M2 AC2M1 AC2M0 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
AC3EN AC3IE AC3IS1 AC3IS0 - AC3M2 AC3M1 AC3M0 AC3CON
Read/Write R/W R/W R/W R/W - R/W R/W R/W
Initial Value 00000000
Table 20-7. Interrupt sensitivity selection
AC3IS1 AC3IS0 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