Microchip AVR® ATtiny 8-bit MCU, ATTINY2313A-MUR, 20 MHz, 2 KB Flash, 128 x 8 RAM, 128 x 8 EEPROM, 18 I/O, I²C/SPI/UART, 1.8-5.5 V, -40 to 85°C, 20-WFQFN Exposed Pad.
| Parameter | Value |
|---|---|
| Series | AVR® ATtiny |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 5.5V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 20MHz |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| RAM size | 128 x 8 |
| Core size | 8-Bit |
| EEPROM size | 128 x 8 |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | I²C, SPI, UART/USART |
| Number of i (O) | 18 |
| Core processor | AVR |
| Case | 20-WFQFN Exposed Pad |
| Program memory size | 2KB (1K x 16) |
The ATTINY2313A-MUR: ROHS3 compliant.
The 20 MHz core speed is the maximum clock from the internal oscillator; no external crystal needed. The 2 KB Flash is the hard limit for compiled code — expect to fit a UART polled handler, a few GPIO toggles, and a small state machine.
Programming is done through the AVR ISP (In-System Programming) interface using the SPI pins, or via a debugWIRE one-wire debugger. Standard Microchip tools like the Atmel-ICE or a cheap USBasp work; the bootloader is not pre-loaded, so an external programmer is required for the first program.