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Microchip Technology ATMEGA2561R212-MU
- Part No.:
- ATMEGA2561R212-MU
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
ATMEGA2561R212-MU.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,022
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Product details
Overview
ATMEGA2561R212-MU from Microchip Technology is a high-performance, low-power 8-bit AVR microcontroller featuring 256KB in-system self-programmable Flash, 4KB EEPROM, 8KB SRAM, 54 programmable I/O lines, and support for QTouch® capacitive touch sensing. It executes up to 16 MIPS at 16MHz, includes six flexible timer/counters with PWM, four USARTs, a 10-bit 8-channel ADC, JTAG debug interface, and operates from 4.5V–5.5V at industrial temperature range (−40°C to +85°C). It is used in embedded control systems requiring robust timing, communication, and low-power operation.
For engineers reviewing the ATMEGA2561R212-MU datasheet, ATMEGA2561R212-MU pinout, ATMEGA2561R212-MU application, or ATMEGA2561R212-MU equivalent, key selection considerations include its 64-pin QFN/MLF package, 256KB Flash memory size, JTAG and ISP programming capability, 8-channel 10-bit ADC with differential input option, and compatibility with QTouch® library for touch interface design.
Technical Context
The ATMEGA2561R212-MU implements an enhanced Harvard RISC architecture with 32 general-purpose 8-bit registers directly connected to the ALU, enabling single-cycle instruction execution. Its CPU supports true read-while-write Flash operation, on-chip boot loader, and six software-selectable sleep modes including Power-down (0.1µA at 1.8V) and ADC Noise Reduction mode.
Peripheral integration includes four USARTs, Master/Slave SPI, 2-wire (I²C-compatible) interface, Real Time Counter with separate oscillator, programmable watchdog timer, analog comparator, and JTAG boundary-scan compliant with IEEE std. 1149.1 for debugging and programming of Flash, EEPROM, fuses, and lock bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | AVR 8-bit RISC with 32 × 8-bit general purpose registers and single-cycle ALU execution |
| Flash Memory | 256KB In-System Self-Programmable Flash with Read-While-Write capability |
| SRAM / EEPROM | 8KB internal SRAM; 4KB EEPROM rated for 100,000 write/erase cycles |
| Max Operating Speed | 16MHz at 4.5V–5.5V supply; throughput up to 16 MIPS |
| I/O Pins | 54 programmable I/O lines with internal pull-up resistors and pin-change interrupt capability |
| ADC | 8-channel, 10-bit successive approximation ADC with optional differential input and programmable gain |
| Timers / PWM | Two 8-bit and four 16-bit Timer/Counters; six PWM channels (2×8-bit, 4×16-bit) with programmable resolution |
| Communication Interfaces | Four USARTs, SPI, 2-wire serial (I²C-compatible), JTAG (IEEE 1149.1) |
Pinout & Package
ATMEGA2561R212-MU is housed in a 64-pad QFN/MLF package with exposed thermal pad internally connected to GND. The package supports fine-pitch surface-mount assembly and requires soldering or gluing of the center pad for mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA7 | Port A bidirectional I/O | 8-bit port with ADC0–ADC7 alternate functions; supports external interrupts and pin-change wake-up |
| PB0–PB7 | Port B bidirectional I/O | 8-bit port with SPI, USART0, and timer compare outputs; highest drive strength among ports |
| PC0–PC7 | Port C bidirectional I/O | 8-bit port with external memory address bus (A8–A15); supports XRAM expansion up to 64KB |
| PD0–PD7 | Port D bidirectional I/O | 8-bit port with USART1, TWI (SCL/SDA), and external interrupt inputs (INT0–INT2) |
| PE0–PE7 | Port E bidirectional I/O | 8-bit port with USART0, ADC reference inputs (AIN0/AIN1), and timer3 capture/interrupt sources |
| PF0–PF7 | Port F analog/digital I/O | 8-bit port serving as ADC input channels (ADC0–ADC7); also provides JTAG TCK/TMS/TDI/TDO signals |
| PG0–PG5 | Port G bidirectional I/O | 6-bit port with WR/RD control signals for external memory interface and timer2 outputs |
| PH0–PH7 | Port H bidirectional I/O | 8-bit port with USART2, timer4 outputs, and external crystal oscillator connections (TOSC1/TOSC2) |
| PJ0–PJ7 | Port J bidirectional I/O | 8-bit port with USART3 and timer5 outputs; supports pin-change interrupts PCINT9–PCINT15 |
| PK0–PK7 | Port K analog/digital I/O | 8-bit port serving as ADC8–ADC15 inputs; available only on 100-pin variants - not present on ATMEGA2561R212-MU |
| PL0–PL7 | Port L bidirectional I/O | 8-bit port with timer5 outputs and external memory control; available only on 100-pin variants - not present on ATMEGA2561R212-MU |
| RESET | Active-low reset input | Asynchronous reset signal; minimum pulse width defined in datasheet for reliable reset assertion |
| XTAL1 / XTAL2 | Crystal oscillator inputs | Connect external quartz crystal or ceramic resonator; internal calibrated RC oscillator also available |
| VCC / GND | Digital power supply | Single 4.5V–5.5V supply; multiple VCC/GND pairs ensure stable core and I/O operation |
| AVCC / AREF | Analog power/reference | AVCC supplies ADC and Port F; AREF sets ADC reference voltage (internal 2.56V or external) |
Key Features
| Feature | Design Value |
|---|---|
| QTouch® Library Support | Enables robust capacitive touch buttons, sliders, and wheels using charge-transfer acquisition and Adjacent Key Suppression® (AKS®) |
| JTAG Debug Interface | IEEE 1149.1-compliant boundary-scan and on-chip debug support for real-time emulation and flash programming |
| True Read-While-Write Flash | Allows application code execution from Boot section while updating Application section - no interruption to real-time operation |
| Six Sleep Modes | Includes Power-down (0.1µA), ADC Noise Reduction, and Extended Standby modes for optimized energy management in battery-powered systems |
| On-Chip Analog Comparator | Configurable with internal reference or external inputs; supports event-triggered interrupts and wake-up from sleep |
| Internal Calibrated Oscillator | 8MHz RC oscillator factory-calibrated to ±10% accuracy; eliminates need for external clock source in cost-sensitive designs |
Applications
| Industrial Motor Control | Smart Home Hub |
|---|---|
Use Scenario: Closed-loop speed and position control of BLDC motors in HVAC actuators and conveyor systems. IC Role / Device Role / Timing Role: Primary controller executing PID algorithms, managing PWM generation for gate drivers, and communicating via USART/RS-485. Use Value: 256KB Flash enables complex motion profiles and firmware updates over serial; 54 I/O pins support encoder feedback, current sensing, and relay control. | Use Scenario: Central coordination unit aggregating Zigbee, BLE, and wired sensor data in residential automation panels. IC Role / Device Role / Timing Role: Host MCU handling protocol translation, local decision logic, and secure OTA update staging. Use Value: Four USARTs allow concurrent connection to multiple radios; JTAG enables field firmware recovery; 8KB SRAM buffers multi-protocol packet queues. |
| Medical Diagnostic Instrument | Energy Monitoring Gateway |
Use Scenario: Portable blood glucose meter with capacitive touch UI and analog front-end signal conditioning. IC Role / Device Role / Timing Role: System-on-chip integrating touch interface, 10-bit ADC sampling, LCD driver, and USB-to-serial bridge. Use Value: QTouch® library reduces BOM count by eliminating dedicated touch IC; 8-channel ADC digitizes sensor inputs with programmable gain for wide dynamic range. | Use Scenario: DIN-rail mounted gateway collecting current/voltage measurements from CTs and PTs across three-phase distribution panels. IC Role / Device Role / Timing Role: Data concentrator performing RMS calculation, time-stamping, and Modbus RTU master polling. Use Value: Real Time Counter with independent oscillator ensures accurate 1-second energy integration intervals; 256KB Flash stores historical logs and firmware rollback images. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATMEGA2560-16AU | 100-pin TQFP package; 86 I/O lines; 16-channel ADC; 12 PWM channels; supports full XRAM expansion | Used where higher I/O count, more ADC channels, or external memory interface is required | Select ATMEGA2560-16AU when board layout allows larger footprint and system demands >54 I/O or >8 ADC inputs |
| ATMEGA1281-AU | Same 64-pin QFN/MLF package; 128KB Flash; 6 PWM channels; 8-channel ADC; identical peripheral set except memory and PWM count | Preferred for cost-sensitive applications with lower code size requirements and reduced PWM needs | Choose ATMEGA1281-AU when firmware fits in 128KB Flash and six PWM channels suffice for motor or lighting control |
Compared with ATMEGA2560-16AU, ATMEGA2561R212-MU offers identical core functionality in a smaller 64-pin QFN package but trades off I/O count and ADC channel count; versus ATMEGA1281-AU, it doubles Flash capacity and adds two additional PWM channels while retaining pin compatibility and thermal profile.
Availability
ATMEGA2561R212-MU is available at Aetrix Electronics and suitable for industrial motor control, smart home hubs, medical diagnostic instruments, and energy monitoring gateways requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for ATMEGA2561R212-MU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog, FPGA, and connectivity solutions, with a strong focus on embedded control and security.
The ATMEGA2561R212-MU belongs to the AVR megaAVR® family, designed specifically for cost-effective, low-power embedded applications demanding high code efficiency, rich peripheral integration, and robust development toolchain support.
FAQ
What is the maximum operating frequency of the ATMEGA2561R212-MU?
The ATMEGA2561R212-MU operates at up to 16MHz when supplied with 4.5V–5.5V. At lower voltages (1.8V–5.5V), its maximum speed is 2MHz; at 2.7V–5.5V, it supports up to 8MHz. This graded speed grade ensures reliable operation across diverse power domains while maintaining timing integrity in industrial environments.
Does the ATMEGA2561R212-MU support in-system programming (ISP)?
Yes, the ATMEGA2561R212-MU supports in-system programming via SPI interface using standard ISP protocols. It also supports JTAG-based programming for Flash, EEPROM, fuses, and lock bits. Both methods enable field firmware updates without removing the device from the PCB, preserving production efficiency and serviceability.
Is the ATMEGA2561R212-MU pin-compatible with other ATmega devices?
The ATMEGA2561R212-MU shares the same 64-pin QFN/MLF package and pinout with ATMEGA1281-AU and ATMEGA641-AU. However, it is not pin-compatible with 100-pin variants like ATMEGA2560-16AU due to differing I/O counts and peripheral mappings. Always verify port assignments and alternate functions against the specific variant's datasheet before migration.
What development tools are supported for the ATMEGA2561R212-MU?
The ATMEGA2561R212-MU is fully supported by Microchip's MPLAB® X IDE, Atmel Studio (legacy), GCC-AVR compiler, and debug tools including Atmel-ICE and JTAGICE3. QTouch® Library integration is enabled through Microchip's QTouch Suite, allowing rapid prototyping of capacitive touch interfaces directly on the ATMEGA2561R212-MU hardware.
What is the data retention specification for Flash and EEPROM in the ATMEGA2561R212-MU?
The ATMEGA2561R212-MU guarantees Flash data retention for 20 years at 85°C and 100 years at 25°C. EEPROM retains data for 100 years at 25°C and 40 years at 85°C. These values are based on reliability qualification testing and apply under specified operating and storage conditions per Microchip's datasheet DS40002211A.
ATMEGA2561R212-MU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4, General ISM < 1GHz
- Protocol:
- 6LoWPAN, Zigbee®
- Modulation:
- DSSS, BPSK, O-QPSK
- Frequency:
- 769MHz ~ 935MHz
- Data Rate (Max):
- 1Mbps
- Power - Output:
- 10dBm
- Sensitivity:
- -110dBm
- Memory Size:
- 256kB Flash, 4kB EEPROM, 8kB RAM
- Serial Interfaces:
- SPI
- GPIO:
- 54
- Voltage - Supply:
- 1.8V ~ 3.6V
- Current - Receiving:
- 8.7mA ~ 9.2mA
- Current - Transmitting:
- 13mA ~ 25mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-QFN (9x9)
ATMEGA2561R212-MU FAQ
1.How can I place an order for ATMEGA2561R212-MU through Aetrix?
Please submit a Request for Quotation (RFQ) for ATMEGA2561R212-MU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ATMEGA2561R212-MU reliable?
The price and inventory of ATMEGA2561R212-MU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATMEGA2561R212-MU is usually 5 days.
3.What payment methods are accepted for ATMEGA2561R212-MU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATMEGA2561R212-MU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATMEGA2561R212-MU?
ATMEGA2561R212-MU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATMEGA2561R212-MU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ATMEGA2561R212-MU?
For technical support, including ATMEGA2561R212-MU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATMEGA2561R212-MU requirements.
6.How does Aetrix verify that ATMEGA2561R212-MU is sourced from the original manufacturer or authorized distributors?
All ATMEGA2561R212-MU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ATMEGA2561R212-MU meets industry standards.
7.What is the process for return or replacement of ATMEGA2561R212-MU?
All ATMEGA2561R212-MU units undergo pre-shipment inspection (PSI). If there is an issue with ATMEGA2561R212-MU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ATMEGA2561R212-MU part is unused and in its original packaging.
Return procedure for ATMEGA2561R212-MU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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