Microchip Technology

ATMEGA644-20MU  

Microcontrollers

The ATMEGA644-20MU is a microcontroller unit (MCU) manufactured by Microchip Technology. It belongs to the ATmega family of 8-bit AVR microcontrollers, which are widely used in various embedded systems and applications due to their high performance, low power consumption, and ease of use.

Description:

The ATMEGA644-20MU is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. It features 64 Kbytes of in-system programmable Flash memory, 4 Kbytes of EEPROM, and 4 Kbytes of SRAM. The MCU operates at a frequency of 20 MHz and is available in a 44-pin QFN (Quad Flat No-leads) package.

Features:

1. 64 Kbytes of In-System Programmable Flash memory with read-while-write capability
2. 4 Kbytes of EEPROM
3. 4 Kbytes of SRAM
4. 44 general-purpose I/O lines
5. 32 general-purpose working registers
6. Nested interrupt controller with 16 priority levels
7. On-chip debug system with JTAG interface
8. Two 8-bit timers/counters with input capture, output compare, and PWM functions
9. One 16-bit timer/counter with input capture, output compare, and PWM functions
10. Two UARTs (USARTs) with RS232/RS485 hardware support
11. One 8-channel, 10-bit ADC with up to 8 external inputs and optional differential input
12. Two high-speed SPI serial ports
13. One full-speed USB 2.0 interface with integrated PHY
14. One I2C bus interface
15. Internal and external interrupts with up to 16 sources
16. On-chip oscillator with calibration and PLL options
17. Power-on reset and brown-out detection
18. Three software selectable power saving modes
19. Operating voltage range: 1.8V to 5.5V
20. Industrial temperature range: -40°C to +85°C

Applications:

The ATMEGA644-20MU is suitable for a wide range of applications due to its versatile features and low power consumption. Some common applications include:

1. Industrial control systems
2. Home automation and smart home devices
3. Medical equipment and devices
4. Portable electronics and battery-powered devices
5. Automotive control systems
6. IoT devices and sensors
7. Data acquisition and signal processing systems
8. Robotics and automation systems
9. Consumer electronics
10. Security systems and access control devices

The ATMEGA644-20MU's combination of memory, I/O capabilities, and low power consumption make it an ideal choice for a variety of embedded systems and applications where performance and energy efficiency are crucial.

ATMEGA644-20MU Documents

Download datasheets and manufacturer documentation for ATMEGA644-20MU

PCN Assembly/Origin :

Additional Assembly Site 28/Sep/2021      

Datasheets :

ATMEGA644/V Summary       ATMEGA644/V Datasheet      

PCN Packaging :

Boxes 07/Dec/2016       MBB/Label Chgs 16/Nov/2018      

PCN Other :

MSL Revision A 26/Mar/2014      

Design Resources :

ATmega644 Development Tool Selector      

HTML Datasheet :

ATMEGA644/V Summary      

PCN Design/Specification :

Marking Chgs 11/Jul/2017      

Environmental Information :

Microchip CA Prop65       Microchip RoHS       Microchip REACH