AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 198

• Manufacturer Part Number: AT90PWM81
• Manufacturer: Atmel Corporation

Specifications of AT90PWM81

• Flash (kbytes): 8 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

16.4.2
198
AT90PWM81
Analog Comparator 2 Control Register – AC2CON
Bit
Read/Write
Initial Value
• Bit 7– AC2EN: Analog Comparator 2 Enable Bit
Set this bit to enable the analog comparator 2.
Clear this bit to disable the analog comparator 2.
• Bit 6– AC2IE: Analog Comparator 2 Interrupt Enable bit
Set this bit to enable the analog comparator 2 interrupt.
Clear this bit to disable the analog comparator 2 interrupt.
• Bit 5, 4– AC2IS1, AC2IS0: Analog Comparator 2 Interrupt Select bit
These 2 bits determine the sensitivity of the interrupt trigger.
The different setting are shown in
Table 16-3.
• Bit 3– Reserved
• 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 16-4.
AC2IS1
0
0
1
1
AC2M2
0
0
0
0
1
1
1
1
7
AC2EN
R/W
0
Interrupt sensitivity selection
Analog Comparator 2 negative input selection
AC2IS0
0
1
0
1
AC2M1
0
0
1
1
0
0
1
1
6
AC2IE
R/W
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
Table
Table
5
AC2IS1
R/W
0
16-3.
16-4.
4
AC2IS0
R/W
0
“Vref”/6.40
“Vref”/3.20
“Vref”/2.13
“Vref”/1.60
Band Gap voltage
DAC result
Analog Comparator Negative Input (ACMPM2 pin)
Analog Comparator Negative Input (ACMPM pin)
Description
3
-
-R
0
2
AC2M2
R/W
0
R/W
1
AC2M1
0
0
AC2M0
R/W
0
7734P–AVR–08/10
AC2CON