ATtiny2313 8-bit AVR Microcontroller

3 November 2020 - 0 Comments

ATtiny2313 AVR Microcontroller

ATtiny2313 Pinout

ATtiny2313 is a high-performance but low-power Microchip 8-bit AVR RISC architecture based Microcontroller unit that has 20 pins, out of which 18 pins can be used as I/O pins.

ATtiny2313 Pin Configuration

Pin Number	Pin Name	Description
1	RESET/dW/PA2	Port A BIt 2 or RESET used mainly for programming or dW
2	PD0/RXD	Bidirectional I/O Pin of Port D Bit 0 or UART DATA Receive
3	PD1/TXD	Bidirectional I/O Pin of Port D Bit 1 or UART DATA Transmit
4	PA1/XTAL2	Port A BIt 1 or Crystal Out
5	PA0/XTAL1	Port A Bit 0 or Crystal In
6	PD2/CKOUT/XCK/INT0	Bidirectional I/O Pin of Port D Bit 2 or External Interrupt 0 or System clock output or USART clock for synchronous transfer
7	PD3/INT1	Bidirectional I/O Pin of Port D Bit 3 or External Interrupt 1
8	PD4/T0	Bidirectional I/O Pin of Port D Bit 4 or Timer 0 Output/counter
9	PD5/OC0B/T1	Bidirectional I/O Pin of Port D Bit 5 or Output compare match Bout or Timer 1 Output / Counter
10	GND	Ground Pin of MCU
11	PD6/ICP	Bidirectional I/O Pin of Port D Bit 6 or Input Capture
12	PB0/AIN0/PCINT0	Bidirectional I/O Pin of Port B Bit 0 or Analog comparator 0 or Pin change Interrupt source
13	PB1/AIN1/PCINT1	Bidirectional I/O Pin of Port B Bit 1 or Analog comparator 1 or Pin change Interrupt source
14	PB2/OC0A/PCIN2	Bidirectional I/O Pin of Port B Bit 2 or Output compare match A out or Pin change Interrupt source
15	PB3/OC1A/PCINT3	Bidirectional I/O Pin of Port B Bit 3 or Output compare match A out or Pin change Interrupt source
16	PB4/OC1B/PCINT4	Bidirectional I/O Pin of Port B Bit 4 or Output compare match Bout or Pin change Interrupt source
17	PB5/MOSI/DI/SDA/PCINT5	Bidirectional I/O Pin of Port B Bit 5 or SPI MOSI, also used in Programming or I2C SDA or Pin change Interrupt source
18	PB6/MISO/DO/PCINT6	Bidirectional I/O Pin of Port B Bit 5 or SPI MISO, also used in Programing or Pin change Interrupt source or three-wire Universal Interface Data output
19	PB7/UCSK/SCL/PCINT7	Bidirectional I/O Pin of Port B Bit 7 or Three-wire mode Universal serial interface or I2C SCL or Pin change Interrupt source or SCK for Programming
20	VCC	Positive Pin of MCU (+5V)

Features and Specification of the ATtiny2313 Microcontroller

ATtiny2313 - Simplified Features and Specification
CPU	8-bit AVR
Number of Pins	20
Operating Voltage (V)	1.8-5.5V
Number of I/O pins	18
ADC Module	Nil
Timer Module	8-bit(1), 16-bit(1)
Comparators	1
DAC Module	Nil
Communication Peripherals	1-UART, 2-SPI, 1-I2C
External Oscillator	Yes
Internal Oscillator	8 MHz
Program Memory (KB)	2 KB
CPU Speed (MIPS)	20 MIPS
RAM Bytes	128
Data EEPROM	128 Bytes

Note: Complete technical details can be found in the ATtiny2313 Datasheet linked at the bottom of this page.

Alternative Product of ATtiny2313

Alternative products for ATtiny2313 microcontroller are listed below-

ATtiny2313A (Exact Alternative with the new release)
ATtiny417
ATtiny28L
ATtiny48
ATmega88PA
ATmega8A
ATmega8515
ATmega8535
ATmega645A
ATmega6490

Introduction to ATtiny2313

ATtiny2313 is a high-performance but low-power Microchip 8-bit AVR RISC architecture based Microcontroller unit that has 20 pins, out of which 18 pins can be used as I/O pins.

It has Powerful instruction architecture that provides a processing speed of 1 MIPS per MHz while balancing power consumption at the same time processing high-speed performance. The speed could reach up to 20 MIPS if 20 Mhz max frequency is used. ATtiny2313 also comes with the debugWIRE On-Chip debugging feature, In-system Programmable SPI Port, Low-Power Idle, Power-down, and Standby Modes. It also uses a programmable brownout detection circuit.

It has a wide operating voltage range, from 1.8V to 5.5V. Thus, it can be used in 1.8V, 3.3V, or 5.0V logic level operations. However, 0-4 Mhz operation is supported by the 1.8V input voltage for ATtiny2313V. For frequency up to 10 Mhz, the minimum voltage is required 2.7V for ATtiny2313, and for 20 Mhz operations, the minimum voltage is required 4.5V-5.5V.

The below image is showing the detailed pin diagram of the ATtiny2313.

ATtiny2313 Pin Diagram

Detailed Features of ATtiny2313

ATtiny2313 –Detailed Features
CPU	8-Bit AVR RISC
Architecture	8
Program Memory Size (Kbytes)	2
RAM (bytes)	128
EEPROM/HEF	128
Pin Count	20
Max. CPU Speed (MHz)	20
Peripheral Pin Select (PPS)	No
Internal Oscillator	4-Mhz
No. Of comparators	1
No. Of Operational Amplifier	0
No. Of ADC channels	0
Max ADC Resolution (bits)	-
ADC with Computation	0
Number of DAC Converter	0
Max DAC resolution	-
Internal Voltage Reference	No
Zero Cross Detect	No
No. Of 8-bit timers	1
No. Of 16-bit Timers	1
Signal Measurement Timer	0
Hardware Limit Timer	0
No. Of PWM outputs	4
Max PWM resolution	1024
Angular Timer	0
Math Accelerator	No
No. Of UART module	1
No. Of SPI Module	2
No. Of I2C module	1
No. Of USB Module	0
Windowed Watchdog Timer (WWDT)	No
CRC/Scan	No
Numerically Controlled Oscillator	No
Cap. Touch Channels	4
Segment LCD	0
Minimum Operating Temperature (*C)	-40
Maximum Operating Temperature (*C)	85
Minimum Operating Voltage (V)	1.8 / (2.7 up to 10 Mhz) / (4.5 up to 20 Mhz)
Maximum Operating Voltage (V)	5.5
High Voltage Capable	No

Programming AVR Microcontroller

PIC microcontrollers can be programmed with different software that is available in the market. There are people who still use Assembly language to program AVR MCUs. The below details is for the most advanced and common software and compiler that has been developed by Atmel (now Microchip) itself.

In order to program the AVR microcontroller, we will need an IDE (Integrated Development Environment), where the programming takes place. A compiler, where our program gets converted into MCU readable form called HEX files.

IDE: Atmel Studio 7

Compiler: AVR and ARM Toolchains

Microchip has given all these two software for free. They can be downloaded directly from their official page. I have also provided the link for your convenience. Once downloaded, install them on your computer. If you have any problem doing so, you can post them in the comment below.

To dump or upload our code into AVR, we will need a device called ATAtmel-ICE. The ATATmel - ICE programmer/debugger is a simple, in-circuit debugger that is controlled by a PC running Atmel Studio software on a Windows platform. The ATAtmel-ICE programmer/debugger is an integral part of the development engineer's tool suite. The basic ATtiny2313 programming circuit is shown below.

ATtiny2313 Programming Circuit

Other than this official programmer, users also use USB ASP AVR Programming Device for low-cost programming solutions.

In addition to this, we will also need other hardware like a Perf board or breadboard, Soldering station, AVR ICs, Crystal oscillators, capacitors, etc.