ATtiny20 Atmel Corporation, ATtiny20 Datasheet - Page 52

• Manufacturer Part Number: ATtiny20
• Manufacturer: Atmel Corporation

Specifications of ATtiny20

• Flash (kbytes): 2 Kbytes
• Pin Count: 14
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 5
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 12
• Ext Interrupts: 12
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.12
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 3
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

10.3.1
52
ATtiny20
Alternate Functions of Port A
The Port A pins with alternate function are shown in
Table 10-3.
• Port A, Bit 0 – ADC0/PCINT0
• Port A, Bit 1 – ADC1/AIN0/PCINT1
• ADC0: Analog to Digital Converter, Channel 0
• PCINT0: Pin Change Interrupt source 0. The PA0 pin can serve as an external interrupt
• ADC1: Analog to Digital Converter, Channel 1
• AIN0: Analog Comparator Positive Input. Configure the port pin as input with the internal pull-
• PCINT1: Pin Change Interrupt source 1. The PA1 pin can serve as an external interrupt
source for pin change interrupt 0.
up switched off to avoid the digital port function from interfering with the function of the
Analog Comparator.
source for pin change interrupt 0.
Port Pin
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
Port A Pins Alternate Functions
Alternate Function
ADC0:
PCINT0: Pin Change Interrupt 0, Source 0
ADC1:
AIN0:
PCINT1:Pin Change Interrupt 0, Source 1
ADC2:
AIN1:
PCINT2: Pin Change Interrupt 0, Source 2
ADC3:
PCINT3: Pin Change Interrupt 0, Source 3
ADC4:
PCINT4: Pin Change Interrupt 0, Source 4
ADC5:
PCINT5: Pin Change Interrupt 0, Source 5
ADC6:
SS :
PCINT6: Pin Change Interrupt 0, Source 6
ADC7:
OC0B:: Timer/Counter0 Compare Match B Output
ICP1:
T1:
SCL:
SCK:
PCINT7: Pin Change Interrupt 0, Source 7
ADC Input Channel 0
ADC Input Channel 1
Analog Comparator, Positive Input
ADC Input Channel 2
Analog Comparator, Negative Input
ADC Input Channel 3
ADC Input Channel 4
ADC Input Channel 5
ADC Input Channel 6
SPI Slave Select
ADC Input Channel 7
Timer/Counter1 Input Capture Pin
Timer/Counter1 Clock Source
TWI Clock
SPI Clock
.
.
Table
10-3.
8235B–AVR–04/11