AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 189
AT90PWM81
Manufacturer Part Number
AT90PWM81
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT90PWM161.pdf
(325 pages)
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
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15. Voltage Reference and Temperature Sensor
15.1
15.2
7734P–AVR–08/10
Features
On Chip voltage Reference and Temperature sensor overview
•
•
•
•
A low power band-gap reference provides AT90PWM81 with an accurate On-chip Bandgap voltage of
1.100 V (Vbg).
Then when SW1 is off and SW2/SW3 is on, the bandgap voltage is multiplied and generates the internal
reference VREF of 2.56V. This reference voltage is used as reference for the ADC, the DAC and can use
a buffer with external decoupling capacitor (when SW0 is on) to enable excellent noise performance with
minimum power consumption as shown on
The selection of the Voltage Reference for all the analog components (ADC, DAC, Comparators) is done
using the REFS1:0 bits in ADMUX register; see
For conditions using the Bandgap and the internal voltage reference, see
Reference Enable Signals and Start-up Time” on page 54
Accurate Voltage Reference of 2.56V
Internal Temperature Sensor
Possibility for Runtime Compensation of Temperature Drift in Both Voltage Reference and On Chip
Oscillators
Low Power Consumption
Figure
“ADC Multiplexer Register – ADMUX” on page
15-1.
“Bandgap and Internal Voltage
AT90PWM81
216.
189
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