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Microchip Technology ATMEGA1284PR212-AU
- Part No.:
- ATMEGA1284PR212-AU
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 44-TQFP
- Datasheet:
-
ATMEGA1284PR212-AU.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,350
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Product details
Overview
ATMEGA1284PR212-AU from Microchip Technology is a high-performance, low-power 8-bit AVR® microcontroller featuring 128KB Flash, 16KB SRAM, 4KB EEPROM, 32 programmable I/O lines, and dual USARTs. It executes most instructions in a single clock cycle, delivers up to 20 MIPS at 20 MHz, and supports true read-while-write Flash programming. It is used in industrial control systems requiring deterministic real-time response and field-upgradable firmware.
For engineers reviewing the ATMEGA1284PR212-AU datasheet, ATMEGA1284PR212-AU pinout, ATMEGA1284PR212-AU application, or ATMEGA1284PR212-AU equivalent, key selection criteria include Flash size, SRAM capacity, dual serial interfaces (USART + SPI + TWI), JTAG debug support, and 1.8–5.5V wide-voltage operation across industrial temperature range.
Technical Context
The ATMEGA1284PR212-AU implements an enhanced RISC core with 131 single-cycle instructions, a 2-cycle hardware multiplier, and full static operation. Its memory subsystem includes independently lockable boot section, 10,000 Flash write/erase cycles, and data retention of 100 years at 25°C.
Peripheral integration includes three timer/counters (two 8-bit, one 16-bit), 8-channel 10-bit ADC with differential mode and selectable gain (1×/10×/200×), programmable watchdog timer, on-chip analog comparator, and six PWM channels - all synchronized to a flexible clock system supporting internal RC, crystal, and external clock sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | AVR 8-bit RISC with 131 single-cycle instructions and 2-cycle hardware multiplier |
| Flash Memory | 128 KB In-System Self-Programmable Flash with independent boot section and lock bits |
| SRAM | 16 KB internal SRAM for stack, variables, and buffer-intensive applications |
| EEPROM | 4 KB EEPROM with 100,000 write/erase cycles and 100-year data retention at 25°C |
| Operating Voltage | 1.8–5.5 V - enables direct interface with 1.8V logic, battery-powered sensors, and 5V legacy peripherals |
| Max Clock Speed | 20 MHz at 4.5–5.5 V - delivers 20 MIPS throughput for real-time control loops |
| ADC Resolution | 10-bit SAR ADC with 8 channels, differential input, and programmable gain (1×/10×/200×) for precision sensor interfacing |
Pinout & Package
ATMEGA1284PR212-AU is housed in a 44-lead TQFP package (10 mm × 10 mm, 0.8 mm pitch) with exposed thermal pad. Pin functions are defined per DS40002070B-page 11 for TQFP/VQFN/QFN/MLF variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary power supply | Connects to main 1.8–5.5 V rail; decoupling required within 10 mm for stable core and peripheral operation |
| GND | Ground reference | Provides return path for all digital and analog circuits; separate analog/digital ground routing recommended |
| PC7 / RESET | Active-low reset input | Drives chip reset when pulled low; internal pull-up enabled unless disabled via fuse bit |
| PD0 / RXD0 | USART0 receive input | Asynchronous serial input for primary UART communication; supports TTL-level signaling |
| PD1 / TXD0 | USART0 transmit output | Asynchronous serial output for primary UART; open-drain capable with external pull-up |
| PD2 / INT0 | External interrupt 0 input | Edge-triggered interrupt source for wake-up or event capture; configurable rising/falling detection |
| PA0–PA7 | Analog input / Port A | 8-bit bidirectional port with ADC0–ADC7 multiplexing; supports differential ADC mode with gain |
| PC0–PC7 | Bidirectional I/O / JTAG | Port C doubles as JTAG TCK/TMS/TDO/TDI pins; JTAG enabled only when OCDEN fuse is programmed |
Key Features
| Feature | Design Value |
|---|---|
| True Read-While-Write Flash | Enables firmware updates without halting application execution - critical for zero-downtime field upgrades |
| JTAG Boundary-Scan Debug | IEEE 1149.1-compliant on-chip debug and boundary-scan support for production test and in-circuit validation |
| 6 Sleep Modes | Power-down mode draws only 0.1 µA at 1.8 V - extends battery life in remote sensing nodes |
| Dual USART Interfaces | Independent UART0 and UART1 allow simultaneous host communication and peripheral bridging (e.g., Modbus + debug console) |
| QTouch® Library Support | Hardware-accelerated capacitive touch sensing up to 64 channels - reduces firmware overhead for HMI implementations |
Applications
| Industrial PLC Module | Smart Energy Meter |
|---|---|
Use Scenario: Compact programmable logic controller handling discrete I/O, analog sensor inputs, and Modbus RTU communication. IC Role / Device Role / Timing Role: Main controller executing ladder logic, managing 32 I/O lines, sampling 8-channel ADC at 10 kHz, and driving dual USARTs for master/slave protocol stacks. Use Value: 128 KB Flash stores complex control algorithms and firmware updates; 16 KB SRAM buffers Modbus transaction queues and real-time process variables. | Use Scenario: DIN-rail mounted electricity meter with voltage/current sensing, tamper detection, and RS-485 data upload. IC Role / Device Role / Timing Role: System-on-chip performing metrology calculations, RTC-based billing intervals, secure EEPROM logging, and isolated RS-485 communication via USART1. Use Value: Differential ADC with 200× gain measures shunt-based current with <1% error; 4 KB EEPROM retains 10+ years of consumption logs with 100,000 write cycles. |
| IoT Edge Node | Home Automation Hub |
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and motion data for LoRaWAN transmission. IC Role / Device Role / Timing Role: Low-power coordinator managing sensor polling, AES-128 encryption, and SPI-connected LoRa transceiver while cycling between Power-save and Power-down modes. Use Value: 0.1 µA Power-down current extends 2xAA battery life beyond 5 years; dual USARTs enable simultaneous BLE debug and sensor UART streams. | Use Scenario: Central hub aggregating Zigbee, Z-Wave, and wired 1-wire devices with local UI and cloud sync. IC Role / Device Role / Timing Role: Host processor running lightweight RTOS, managing TWI-based sensor expansion, SPI-connected display driver, and USB-to-UART bridge via USART0. Use Value: 32 programmable I/O lines directly drive LEDs, relays, and buttons; QTouch® support enables capacitive touch panel without external IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ATMEGA1284P-AU | Same core, memory, and peripherals; differs in speed grade (0–20 MHz @ 4.5–5.5 V only) and packaging (44-TQFP vs. 44-TQFP - identical footprint) | Identical functional scope but lacks extended 1.8–5.5 V operation at lower frequencies; not suitable for 1.8 V battery designs | Select ATMEGA1284P-AU only if operating strictly at 5 V and no sub-2.7 V support is needed. |
| ATMEGA644PA-AU | Halved Flash (64 KB), SRAM (4 KB), and EEPROM (2 KB); same pinout, peripherals, and 1.8–5.5 V support | Suitable for cost-sensitive or memory-constrained designs where firmware size <60 KB and RAM usage <3.5 KB | Choose ATMEGA644PA-AU when application code fits within 64 KB and requires identical I/O/peripheral compatibility with migration path to ATMEGA1284PR212-AU. |
Compared with ATMEGA1284P-AU, ATMEGA1284PR212-AU adds guaranteed 1.8 V operation down to 0 Hz and tighter production screening (R212 grade). Against ATMEGA644PA-AU, it provides double Flash/SRAM/EEPROM while retaining pin and code compatibility - enabling scalable firmware development across product tiers.
Availability
ATMEGA1284PR212-AU is available at Aetrix Electronics and suitable for industrial automation, smart metering, and IoT edge node designs requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade screening.
Supply support for ATMEGA1284PR212-AU 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 Inc. is a leading provider of microcontrollers, analog, FPGA, and connectivity solutions, serving industrial, automotive, communications, and consumer markets since 1989.
The megaAVR® family - including ATMEGA1284PR212-AU - was designed for cost-sensitive, high-reliability embedded applications demanding rich peripheral integration, low-power operation, and robust in-system programming capability.
FAQ
What is the maximum operating frequency of the ATMEGA1284PR212-AU?
The ATMEGA1284PR212-AU operates up to 20 MHz at 4.5–5.5 V, 10 MHz at 2.7–5.5 V, and 4 MHz at 1.8–5.5 V. Its R212 screening grade guarantees full functionality across this entire voltage-frequency envelope, unlike standard ATMEGA1284P variants limited to 5 V operation.
Does the ATMEGA1284PR212-AU support JTAG debugging?
Yes, the ATMEGA1284PR212-AU supports IEEE 1149.1-compliant JTAG interface for boundary-scan testing and on-chip debug. JTAG pins (TCK, TMS, TDO, TDI) are multiplexed on Port C (PC2–PC5) and require OCDEN fuse programming to activate debug functionality.
What are the memory specifications of the ATMEGA1284PR212-AU?
The ATMEGA1284PR212-AU integrates 128 KB of In-System Self-Programmable Flash, 16 KB of internal SRAM, and 4 KB of EEPROM. Flash endurance is rated at 10,000 write/erase cycles; EEPROM endurance is 100,000 cycles with 100-year data retention at 25°C.
Can the ATMEGA1284PR212-AU operate from a 1.8 V supply?
Yes, the ATMEGA1284PR212-AU is fully specified for 1.8–5.5 V operation. At 1.8 V, it supports up to 4 MHz clock speed and achieves 0.4 mA active current and 0.1 µA Power-down current - making it suitable for ultra-low-power battery applications.
How many serial communication interfaces does the ATMEGA1284PR212-AU include?
The ATMEGA1284PR212-AU includes two USARTs (UART0 and UART1), one SPI interface, and one Two-wire Serial Interface (TWI/I²C). All three protocols are independently accessible and can operate concurrently, enabling multi-protocol connectivity in resource-constrained designs.
ATMEGA1284PR212-AU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-TQFP
- 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:
- 128kB Flash, 4kB EEPROM, 16kB SRAM
- Serial Interfaces:
- SPI
- GPIO:
- 32
- 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:
- 44-TQFP (10x10)
ATMEGA1284PR212-AU FAQ
1.How can I place an order for ATMEGA1284PR212-AU through Aetrix?
Please submit a Request for Quotation (RFQ) for ATMEGA1284PR212-AU 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 ATMEGA1284PR212-AU reliable?
The price and inventory of ATMEGA1284PR212-AU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATMEGA1284PR212-AU is usually 5 days.
3.What payment methods are accepted for ATMEGA1284PR212-AU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATMEGA1284PR212-AU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATMEGA1284PR212-AU?
ATMEGA1284PR212-AU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATMEGA1284PR212-AU 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 ATMEGA1284PR212-AU?
For technical support, including ATMEGA1284PR212-AU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATMEGA1284PR212-AU requirements.
6.How does Aetrix verify that ATMEGA1284PR212-AU is sourced from the original manufacturer or authorized distributors?
All ATMEGA1284PR212-AU 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 ATMEGA1284PR212-AU meets industry standards.
7.What is the process for return or replacement of ATMEGA1284PR212-AU?
All ATMEGA1284PR212-AU units undergo pre-shipment inspection (PSI). If there is an issue with ATMEGA1284PR212-AU, 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 ATMEGA1284PR212-AU part is unused and in its original packaging.
Return procedure for ATMEGA1284PR212-AU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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