AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 78
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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9.3.4
78
AT90PWM81
Alternate Functions of Port E
Table 9-8.
The Port E pins with alternate functions are shown in
Table 9-9.
The alternate pin configuration is as follows:
• AREF/ADC6, Bit 3
AREF: Analog reference voltage. See
ADC6, Analog to Digital Converter, input channel 6
This pin can only be used as a digital output pin. It cannot be read as a digital input.
• XTAL2/ACMP1M/PSCINr – Bit 2
XTAL2: Chip clock Oscillator pin 2. Used as clock pin for crystal Oscillator or Low-frequency crystal
Oscillator. When used as a clock pin, the pin can not be used as an I/O pin.
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Port Pin
PE2
PE1
PE0
Alternate Function
XTAL2: XTAL Output
ACMP1M (Analog Comparator 1 Negative Input)
PCSINr (PSCR Digital Input)
XTAL1: XTAL Input
PCSIN2 (PSC 2 Digital Input)
ACMP1_OUT (Analog Comparator 1 Output.)
RESET (Reset Input)
OCD (On Chip Debug I/O)
INT2 (External Interrupt 2 Input)
Overriding Signals for Alternate Functions in PD3..PD0
Port E Pins Alternate Functions
PD3/ADC1/
ACMP2_OUT
Table 17-3 on page 217
PD2/ADC0/
ACMP1
.
Table
9-9.
PD1/PSCOUTR0/
PSCINrB
for the definition of this pin.
PD0/ACMP2_OUT/
SS/CLKO
7734P–AVR–08/10
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