ATTINY20-XU Atmel, ATTINY20-XU Datasheet - Page 56

• Manufacturer Part Number: ATTINY20-XU
• Description: MCU AVR 2KB FLASH 12MHZ 14TSSOP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY20-XU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: ATtiny
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SPI, TWI
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

56
ATtiny20
• Port B, Bit 0 – T0/CLKI/TPICLK/PCINT8
• Port B, Bit 1 – OC1A/SDA/MOSI/TPIDATA/PCINT9
• Port B, Bit 2 – INT0/OC0A/OC1B/MISO/CKOUT/PCINT10
• Port B, Bit 3 – RESET/PCINT11
• T0: Timer/Counter0 Clock Source.
• CLKI: Clock Input from an external clock source, see
• TPICLK: Serial Programming Clock.
• PCINT8: Pin Change Interrupt source 8. The PB0 pin can serve as an external interrupt
• OC1A: Output Compare Match output. Provided that the pin has been configured as an
• SDA: TWI Data. The pin is disconnected from the port and becomes the serial data for the
• MOSI: SPI Master Output / Slave Input. Regardless of DDB1, this pin is automatically
• TPIDATA: Serial Programming Data.
• PCINT9: Pin Change Interrupt source 9. The PB1 pin can serve as an external interrupt
• INT0: External Interrupt Request 0.
• OC0A: Output Compare Match output. Provided that the pin has been configured as an
• OC1B: Output Compare Match output. Provided that the pin has been configured as an
• MISO: SPI Master Input / Slave Output. Regardless of DDB2, this pin is automatically
• CKOUT - System Clock Output: The system clock can be output on the PB2 pin. The system
• PCINT10: Pin Change Interrupt source 10. The PB2 pin can serve as an external interrupt
• RESET: External Reset input is active low and enabled by unprogramming (“1”) the
• PCINT11: Pin Change Interrupt source 11. The PB3 pin can serve as an external interrupt
source for pin change interrupt 1.
output it serves as an external output for Timer/Counter1 Compare Match A. This pin is also
the output for the timer/counter PWM mode function.
TWI when TWEN in TWSCRA is set. In this mode of operation, the pin is driven by an open
drain driver with slew rate limitation and a spike filter.
configured as an input when SPI is enabled as a slave. The data direction of this pin is
controlled by DDB1 when SPI is enabled as a master.
source for pin change interrupt 1.
output it serves as an external output for Timer/Counter0 Compare Match A. This pin is also
the output for the timer/counter PWM mode function.
output it serves as an external output for Timer/Counter1 Compare Match B. This pin is also
the output for the timer/counter PWM mode function.
configured as an input when SPI is enabled as a master. The data direction of this pin is
controlled by DDB2 when SPI is enabled as a slave.
clock will be output if the CKOUT Fuse is programmed, regardless of the PORTB2 and DDB2
settings. It will also be output during reset.
source for pin change interrupt 1.
RSTDISBL Fuse. Pullup is activated and output driver and digital input are deactivated when
the pin is used as the RESET pin.
source for pin change interrupt 1.
“External Clock” on page
19.
8235B–AVR–04/11