AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 225

• 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

7734P–AVR–08/10
• Bit 5, 4– AMP0G1, 0: Amplifier 0 Gain Selection Bits
These 2 bits determine the gain of the amplifier 0.
The different setting are shown in
Table 17-7.
To ensure an accurate result, after the gain value has been changed, the amplifier input needs to have a
quite stable input value during at least 4 Amplifier synchronization clock periods.
• Bit 3– AMP0GS: Amplifier 0 Ground Select of AMP0
This bit select negative input of the amplifier:
Set this bit to ground the Amplifier 0 negative input.
Clear this bit to normally use the Amplifier 0 differential input.
• Bit 1, 0– AMP0TS1, AMP0TS0: Amplifier 0 Trigger Source Selection Bits
In accordance with the Table 17-8, these 2 bits select the event which will generate the trigger for the
amplifier 0. This trigger source is necessary to start the conversion on the amplified channel.
Table 17-8.
AMP0G1
0
0
1
1
AMP0TS1
0
0
1
1
Amplifier 0 Gain Selection
AMP0 Auto Trigger Source Selection
AMP0G0
0
1
0
1
AMP0TS0
0
1
0
1
Description
Gain 5
Gain 10
Gain 20
Gain 40
Table
Description
Auto synchronization on ADC Clock/8
Trig on PSCRASY
Trig on PSC2ASY
17-7.
AT90PWM81
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