ATMEGA1281-16MUR

ATmega1281-16MU is an Atmel/Microchip megaAVR 8‑bit microcontroller. It uses the AVR RISC core, with a relatively large flash program memory (128 KB), nonvolatile EEPROM, and RAM for runtime data. The “-16M” in the part name signifies a 16 MHz maximum clock, and “MU” indicates the 100‑pin TQFP (MU) package variant. It typically operates from about 2.7–5.5 V.
Key peripherals include multiple timers and PWM outputs, a 10‑bit ADC with multiple channels, and serial interfaces such as USART/UART, SPI, and I²C/TWI. It supports various sleep and other power‑saving modes, plus a watchdog timer.
Development is supported by Atmel Studio, AVR‑GCC, and common bootloader options. Typical applications are embedded controllers, data logging, sensor interfaces, motor control, and general-purpose automation in consumer, industrial, and automotive‑related projects.

Here are the typical features of ATmega1281-16MUR (megaAVR 8-bit MCU):
- 8-bit AVR RISC CPU, up to 16 MIPS at 16 MHz
- Flash memory: 128 KB with In-System Programming (ISP)
- EEPROM: 4 KB; SRAM: 4 KB
- Extensive I/O lines (package dependent)
- ADC: 8-channel, 10-bit
- Timers/Counters: multiple 8/16-bit timers with PWM
- Serial peripherals: 2 USARTs, SPI, I2C (TWI)
- JTAG interface for on-chip debugging; DebugWIRE option
- External memory interface (XMEM) for RAM/ROM expansion
- Interrupt controller with multiple sources
- Peripherals for power management: Watchdog Timer, Brown-out Detector, Power-on Reset
- Low-power sleep modes with wake-up
- Packages: compact -MU variants (e.g., 40/44/80-pin options)
- Operating voltage and speed: 1.8–5.5 V, up to 16 MHz (speed tied to voltage)

- Pin count: 100 pins (100-pin package, e.g., TQFP/ULQFP).
- Function: ATmega1281 is an 8-bit AVR microcontroller (megaAVR family) with 16 MHz operation, 128 KB flash, 8 KB SRAM, 4 KB EEPROM, and integrated peripherals (USART/SPI/I2C, timers, ADC, etc.) for embedded control applications.

Manufacturer: Microchip Technology Incorporated (the Atmel brand).
What kind of company: A multinational American semiconductor company that designs and manufactures embedded-control products, including microcontrollers (PIC and AVR), memory, and analog ICs. It acquired Atmel in 2016, and AVR parts like ATmega1281-16MUR now fall under Microchip’s AVR product line.

ATMEGA1281-16MUR is an 8‑bit AVR MCU used for embedded control across various areas. Common applications include:
- Industrial automation and process control (I/O, timing, sensing)
- Motor control and robotics (PWM, ADC, serial comms)
- Data acquisition, instrumentation, and logging
- Home/building automation and smart devices
- Consumer electronics and prototyping (education, DIY projects)
- Automotive subsystems (non-safety-critical electronics)
- Portable/medical instrumentation (non-critical monitoring)
These areas benefit from its multiple peripherals (timers, ADC, UART/SPI/I2C, interrupts) and substantial flash memory for embedded code.

ATMEGA1281-16MUR comes in a 100-pin Plastic TQFP (LQFP) package, RoHS-compliant.