ATTINY25-20SUR Atmel, ATTINY25-20SUR Datasheet - Page 63

• Manufacturer Part Number: ATTINY25-20SUR
• Description: MCU AVR 2KB FLASH 20MHZ 8SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY25-20SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2586M–AVR–07/10
• Port B, Bit 4 – XTAL2/CLKO/ADC2/OC1B/PCINT4
• Port B, Bit 3 – XTAL1/CLKI/ADC3/OC1B/PCINT3
• Port B, Bit 2 – SCK/ADC1/T0/USCK/SCL/INT0/PCINT2
• Port B, Bit 1 – MISO/AIN1/OC0B/OC1A/DO/PCINT1
• ADC0: Analog to Digital Converter, Channel 0
• PCINT5: Pin Change Interrupt source 5.
• XTAL2: Chip Clock Oscillator pin 2. Used as clock pin for all chip clock sources except
• CLKO: The devided system clock can be output on the pin PB4. The divided system clock
• ADC2: Analog to Digital Converter, Channel 2
• OC1B: Output Compare Match output: The PB4 pin can serve as an external output for the
• PCINT4: Pin Change Interrupt source 4.
• XTAL1: Chip Clock Oscillator pin 1. Used for all chip clock sources except internal
• CLKI: Clock Input from an external clock source, see
• ADC3: Analog to Digital Converter, Channel 3
• OC1B: Inverted Output Compare Match output: The PB3 pin can serve as an external output
• PCINT3: Pin Change Interrupt source 3.
• SCK: Master Clock output, Slave Clock input pin for SPI channel. When the SPI is enabled
• ADC1: Analog to Digital Converter, Channel 1
• T0: Timer/Counter0 counter source.
• USCK: Three-wire mode Universal Serial Interface Clock.
• SCL: Two-wire mode Serial Clock for USI Two-wire mode.
• INT0: External Interrupt source 0.
• PCINT2: Pin Change Interrupt source 2.
• MISO: Master Data input, Slave Data output pin for SPI channel. When the SPI is enabled as
port pin is configured as a wire-AND (open-drain) bi-directional I/O pin with pull-up enabled
and becomes the communication gateway between target and emulator.
internal calibrateble RC Oscillator and external clock. When used as a clock pin, the pin can
not be used as an I/O pin. When using internal calibratable RC Oscillator or External clock as
a Chip clock sources, PB4 serves as an ordinary I/O pin.
will be output if the CKOUT Fuse is programmed, regardless of the PORTB4 and DDB4
settings. It will also be output during reset.
Timer/Counter1 Compare Match B when configured as an output (DDB4 set). The OC1B pin
is also the output pin for the PWM mode timer function.
calibrateble RC oscillator. When used as a clock pin, the pin can not be used as an I/O pin.
for the Timer/Counter1 Compare Match B when configured as an output (DDB3 set). The
OC1B pin is also the inverted output pin for the PWM mode timer function.
as a Slave, this pin is configured as an input regardless of the setting of DDB2. When the SPI
is enabled as a Master, the data direction of this pin is controlled by DDPB2. When the pin is
forced by the SPI to be an input, the pull-up can still be controlled by the PORTB2 bit.
a Master, this pin is configured as an input regardless of the setting of DDB1. When the SPI
is enabled as a Slave, the data direction of this pin is controlled by DDB1. When the pin is
forced by the SPI to be an input, the pull-up can still be controlled by the PORTB1 bit.
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“External Clock” on page
26.
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