The Microchip Technology ATMEGA3290PA-AU is a high-performance, low-power 8-bit AVR RISC microcontroller designed for embedded control, LCD display applications, and intelligent electronic systems. Featuring a maximum clock frequency of 20MHz, 32KB of in-system programmable Flash memory, 2KB SRAM, and 1KB EEPROM, this device provides flexible processing and memory resources in a 100-pin TQFP surface-mount package.
Based on Microchip’s picoPower® AVR architecture, the ATMEGA3290PA-AU delivers processing performance of up to 20 MIPS at 20MHz while supporting energy-efficient operation. Its enhanced RISC architecture incorporates 130 instructions, 32 general-purpose working registers, and an on-chip hardware multiplier for efficient program execution.
The microcontroller integrates a 4 × 40 segment LCD controller with internal contrast control, enabling direct connection to compatible segmented LCD displays without requiring a separate LCD driver IC. With up to 69 programmable I/O lines, it provides extensive connectivity for sensor interfaces, user controls, display systems, and embedded applications.
The ATMEGA3290PA-AU includes an 8-channel, 10-bit analog-to-digital converter (ADC), four PWM channels, two 8-bit timers, one 16-bit timer, and an integrated real-time counter. Communication peripherals include USART, SPI, and Universal Serial Interface (USI), supporting flexible embedded communication and peripheral interfacing.
The device also provides JTAG-based debugging and programming, a programmable watchdog timer, power-on reset, brown-out detection, and five software-selectable power-saving modes. Its in-system programmable Flash and EEPROM memories support firmware development, system configuration, and nonvolatile data storage.
Operating from a 1.8V to 5.5V supply according to the family datasheet, the ATMEGA3290PA-AU is suitable for low-power embedded systems. It supports an industrial operating temperature range of -40°C to +85°C.
Housed in a 100-pin TQFP package with a nominal 14 × 14mm body size, this microcontroller is suitable for automated SMT assembly and high-density PCB designs. It is ideal for LCD-enabled instrumentation, industrial control panels, smart appliances, portable measurement equipment, and general-purpose embedded control systems.
Key Specifications:
- Manufacturer: Microchip Technology
- Part Number: ATMEGA3290PA-AU
- Product Family: AVR® ATmega
- Product Type: 8-Bit Microcontroller (MCU)
- CPU Architecture: AVR Enhanced RISC
- Core Size: 8-Bit
- Maximum Clock Frequency: 20MHz
- Maximum Processing Performance: 20 MIPS
- Flash Program Memory: 32KB
- SRAM: 2KB
- EEPROM: 1KB
- Programmable I/O Lines: 69
- Integrated LCD Controller: 4 × 40 Segment
- LCD Display Capability: Up to 160 Segments
- ADC Resolution: 10-Bit
- ADC Channels: 8
- PWM Channels: 4
- 8-Bit Timers/Counters: 2
- 16-Bit Timers/Counters: 1
- Real-Time Counter: Integrated
- Communication Interfaces: USART, SPI, USI
- Debug Interface: JTAG
- Program Memory Interface: In-System Programming (ISP)
- Supply Voltage: 1.8V to 5.5V (Family Datasheet)
- Internal Oscillator: Integrated Calibrated Oscillator
- Watchdog Timer: Programmable
- Protection and Reset Features: Power-On Reset, Brown-Out Detection
- Power-Saving Modes: 5
- Flash Endurance: 10,000 Write/Erase Cycles
- EEPROM Endurance: 100,000 Write/Erase Cycles
- Operating Temperature: -40°C to +85°C
- Package: 100-TQFP
- Package Body Dimensions: 14 × 14mm (Nominal)
- Number of Pins: 100
- Mounting Type: Surface Mount (SMD/SMT)
- Packaging: Tray
- Product Status: In Production
Typical Applications:
- LCD display control systems
- Industrial instrumentation and meters
- Smart home appliances
- Portable measurement equipment
- Embedded control systems
- Industrial control panels
- Sensor monitoring and data acquisition
- Low-power battery-operated electronics
- Consumer electronic devices
- General-purpose AVR microcontroller applications
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