atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 259

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

20.3
7647A–AVR–02/08
Use of ADC Amplifiers
Figure 20-1. Analog Comparator Block Diagram
Notes:
Thanks to AMPCMP0 configuration bit, Comparator 0 positive input can be connected to Ampli-
fier O output. In that case, the clock of comparator 0 is adapted to the amplifier 0 clock.
“Amplifier 0 Control and Status register – AMP0CSR” on page 251.
Thanks to AMPCMP1 configuration bit, Comparator 1 positive input can be connected to Ampli-
fier 1 output. In that case, the clock of comparator 1 is adapted to the amplifier 1 clock.
“Amplifier 1 Control and Status register – AMP1CSR” on page 252.
Thanks to AMPCMP2 configuration bit, Comparator 2 positive input can be connected to Ampli-
fier 2 output. In that case, the clock of comparator 2 is adapted to the amplifier 2 clock.
“Amplifier 1 Control and Status register – AMP1CSR” on page 252.
1. ADC multiplexer output: see
2. Refer to
3. The voltage on Vref is defined in
ACMPN0
ACMPN1
ACMPN2
ACMPN3
ACMP0
ACMP1
ACMP2
ACMP3
Aref
AVcc
Internal 2.56V
ADC
ADC
ADC
Figure 1-1 on page 3
Reference
AMPCMP0
AMPCMP1
AMPCMP2
+
+
+
-
-
-
REFS1
REFS0
AMP0
AMP1
AMP2
AMPCMP0
AMPCMP1
AMPCMP2
Bandgap
Result
DAC
/1.60
/2.13
/3.20
/6.40
Table 18-5 on page
and for Analog Comparator pin placement.
18-4 “ADC Voltage Reference Selection” on page 242
AC0M
2 1 0
AC1M
2 1 0
AC2M
2 1 0
AC3M
2 1 0
(1)(2)
CLK
+
-
+
-
+
-
+
-
AC0EN
AC1EN
AC2EN
AC3EN
CLK
CLK
CLK
I/O
I/O
I/O
I/O
(/2)
(/2)
(/2)
(/2)
243.
ATmega32/64/M1/C1
Interrupt Sensitivity Control
Interrupt Sensitivity Control
Interrupt Sensitivity Control
Interrupt Sensitivity Control
AC0IS1
AC1IS1
AC2IS1
AC3IS1
AC0IS0
AC1IS0
AC2IS0
AC3IS0
AC0IE
AC1IE
AC1ICE
AC2IE
AC3IE
AC0IF
Analog Comparator 0 Interrupt
AC1IF
Analog Comparator 1 Interrupt
T1 Capture Trigger
AC2IF
Analog Comparator 2 Interrupt
AC3IF
Analog Comparator 3 Interrupt
AC0O
AC1O
AC2O
AC3O
See
See
See
259