ATtiny (also known as TinyAVR) is a subfamily of the popular 8-bit AVR microcontrollers, which typically has fewer features, fewer I/O pins, and less memory than other AVR series chips. The first members of this family were released in 1999 by Atmel (later acquired by

Microchip Technology Microchip Technology Incorporated is a publicly listed American semiconductor corporation that manufactures microcontroller, mixed-signal, analog, and Flash-IP integrated circuits. Its corporate headquarters is located in Chandler, Arizona. ...

in 2016).

Features

ATtiny microcontrollers specifically exclude various common features, such as: USB peripheral, DMA controller, crypto engine, or an external memory bus. The following table summarizes common features of the ATtiny microcontrollers, for easy comparison. This table is not meant to be an unabridged feature list. ;Notes :* Package column - the number after the dash is the number of pins on the package. DIP packages in this table are row-to-row. SOwww means SOIC package with a case width of 'www' in

thousandth of an inch A thousandth of an inch is a derived unit of length in a system of units using inches. Equal to of an inch, a thousandth is commonly called a thou (used for both singular and plural) or, particularly in North America, a mil (plural mils). Th ...

. Though some package types are known by more than one name, a common name was chosen to make it easier to compare packages. :* UART/I²C/SPI columns - means a dedicated peripheral, * means a multi-feature peripheral that is chosen by setting configuration bits. Most USART peripherals support a minimum choice between UART or SPI, where as some might support additional choices, such as LIN,

IrDA IrDA is a wireless standard designed for exchanging data using infrared (IR). Infrared ports for this purpose have been implemented in portable electronic devices such as mobile telephones, laptops, cameras, printers, and medical devices. The mai ...

RS-485 RS-485, also known as TIA-485(-A) or EIA-485, is a standard, originally introduced in 1983, defining the electrical characteristics of drivers and receivers for use in serial communications systems. Electrical signaling is balanced, and Telecomm ...

. :* Timers column - more recent families have wider timers and may allow chaining two 16-bit timers to do 32-bit capture. RTT is a 16-bit Real Time Timer that is driven by a 32.768KHz clock, though Microchip calls it RTC for Real Time Counter (easily confused to mean Real Time Clock). :* ADC pins column - the total number of analog channels that are accessible via pins that multiplex into the ADC input. Most parts have one ADC, a few have two ADC. :* Pgm/Dbg column - flash programming and debugging protocols: HVPP means High Voltage Parallel Programming 12V protocol, HVSP means High Voltage Serial Programming 12V protocol, ISP means In-System Programmable protocol, uses SPI to program the internal flash. TPI is Tiny Programming Interface. dW means debugWIRE protocol. UPDI means Unified Program and Debug Interface protocol (newest). ;Abbreviations * TWI: Many of Atmels microcontrollers contain built-in support for interfacing to a two-wire bus, called Two-Wire Interface. This is essentially the same thing as the

I²C I2C (Inter-Integrated Circuit; pronounced as "" or ""), alternatively known as I2C and IIC, is a synchronous, multi-master/multi-slave, single-ended, serial communication bus invented in 1980 by Philips Semiconductors (now NXP Semiconduct ...

interface by Philips, but that term is avoided in Atmel's documentation due to trademark issues. * USI: Universal Serial Interface (not to be confused with

USB Universal Serial Bus (USB) is an industry standard, developed by USB Implementers Forum (USB-IF), for digital data transmission and power delivery between many types of electronics. It specifies the architecture, in particular the physical ...

). The USI is a multi-purpose hardware communication module. With appropriate software support, it can be used to implement an SPI,

UART A universal asynchronous receiver-transmitter (UART ) is a peripheral device for asynchronous serial communication in which the data format and transmission speeds are configurable. It sends data bits one by one, from the least significant to ...

interface. USART peripherals have more features than USI peripherals.

Timeline

The following table lists each ATtiny microcontroller by the first release date of each datasheet.

Development boards

The following are ATtiny development boards sold by Microchip Technology: * ATtiny104 Xplained Nano * ATtiny416 Xplained Nano * ATtiny817 AVR Parrot * ATtiny817 Xplained Mini * ATtiny817 Xplained Pro * ATtiny3217 Xplained ProATtiny3217 Xplained Pro board; Microchip.
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References

External links

{{Commons category
Microchip 8-bit AVR MCU product webpage
- Microchip
Microchip 8-bit AVR MCU product selector (PDF)
- Microchip
Atmel tinyAVR fast and code efficient flyer (PDF)
- Microchip
All tinyAVR parts in a spreadsheet
- EDN Magazine, September 8, 2014.
ATtiny44/84 and ATtiny45/85 Pinout Diagrams
Atmel microcontrollers Computing comparisons

Features

Timeline

Development boards

See also

References

Further reading

External links