atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 263

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

20.4.4
7647A–AVR–02/08
Analog Comparator 3 Control Register – AC3CON
These 3 bits determine the input of the negative input of the analog comparator.
The different setting are shown in
Table 20-6.
Bit
Read/Write
Initial Value
• 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 20-7.
• Bit 3 – Res: Reserved Bit
This bit is an unused bit in the ATmega32/64/M1/C1, and will always read as zero.
• Bit 2, 1, 0– AC3M2, AC3M1, AC3M0: Analog Comparator 3 Multiplexer register
AC2M2
0
0
0
0
1
1
1
1
AC3IS1
0
0
1
1
Analog Comparator 2 negative input selection
Interrupt sensitivity selection
AC3IS0
0
1
0
1
AC2M1
0
0
1
1
0
0
1
1
AC3EN
R/W
7
0
AC3IE
R/W
6
0
Description
Comparator Interrupt on output toggle
Reserved
Comparator interrupt on output falling edge
Comparator interrupt on output rising edge
AC2M0
0
1
0
1
0
1
0
1
AC3IS1
Table
Table
R/W
5
0
20-6.
20-1.
AC3IS0
Description
“Vref”/6.40
“Vref”/3.20
“Vref”/2.13
“Vref”/1.60
Bandgap (1.1V)
DAC result
Analog Comparator Negative Input (ACMPM pin)
Reserved
R/W
4
0
3
0
-
-
ATmega32/64/M1/C1
AC3M2
R/W
2
0
AC3M1
R/W
1
0
AC3M0
R/W
0
0
AC3CON
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