AT90PWM161 Atmel Corporation, AT90PWM161 Datasheet - Page 194

• Manufacturer Part Number: AT90PWM161
• Manufacturer: Atmel Corporation

Specifications of AT90PWM161

• Flash (kbytes): 16 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 20
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 3
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 8
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

16. Analog Comparator
16.1
16.2
194
Features
Overview
AT90PWM81
The Analog Comparator compares the input values on the positive pin ACMPx and negative pin ACMPM
or ACMPMx.
•
•
•
•
•
The AT90PWM81 features 3 fast analog comparators.
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.
Each comparator can trigger a separate interrupt, exclusive to the Analog Comparator. In addition, 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 comparators and their surrounding logic is shown in
• a steady value among the 4 internal reference levels defined by the Vref selected thanks to the
• a value generated from the internal DAC
• an external analog input ACMPMx.
3 Analog Comparators
High Speed analog Comparators
+/-25mV or +/-10mV or 0 Hysteresis
4 reference levels
Generation of Configurable Interrupts
REFS1:0 bits in ADMUX register.
Figure
16-1.
7734P–AVR–08/10