ATMEGA32M1-AU Atmel, ATMEGA32M1-AU Datasheet - Page 254

• Manufacturer Part Number: ATMEGA32M1-AU
• Description: MPU AVR 32K FLASH 20MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32M1-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: CAN, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -

23. AC – Analog Comparator
23.1
23.2
254
Features
Overview
ATmega16M1/32M1/64M1
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The ATmega16M1/32M1/64M1 features 4 fast analog comparators. The Analog Comparator
compares the input values on the positive pin ACMPx and negative pin ACMPM or ACMPMx.
Each comparator has a dedicated input on the positive input, and the negative input of each
comparator can be configured as:
When the voltage on the positive ACMPn pin is higher than the voltage selected by the ACnM
multiplexer on the negative input, the Analog Comparator output, ACnO, is set.
The comparator is a clocked comparator. A new comparison is done on the falling edge of
CLK
ator Status Register” on page 260.
Each comparator can trigger a separate interrupt, exclusive to the Analog Comparator. In addi-
tion, the user can select Interrupt triggering on comparator output rise, fall or toggle.
The interrupt flags can also be used to synchronize ADC or DAC conversions.
Moreover, the comparator’s output of the comparator 1 can be set to trigger the Timer/Counter1
Input Capture function.
A block diagram of the four comparators and their surrounding logic is shown in
page
• a steady value among the 4 internal reference levels defined by the Vref selected thanks to
• a value generated from the internal DAC
• an external analog input ACMPMx
4 Analog Comparators
High Speed Clocked Comparators
±30mV Hysteresys
4 reference levels
Generation of Configurable Interrupts
the REFS1:0 bits in ADMUX register
I/O
255.
or CLK
I/O
/2. Depending on ACCKDIV fit of ACSR register,
See “ACSR – Analog Compar-
Figure 23-1 on
8209D–AVR–11/10