Microchip Technology

ATMEGA644-20AU  

Microcontrollers

The ATMEGA644-20AU is a microcontroller unit (MCU) manufactured by Microchip Technology. It is part of the ATmega family of 8-bit AVR microcontrollers, which are widely used in various embedded systems and applications.

Description:

The ATMEGA644-20AU 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 In-System Programmable SRAM, and 2 Kbytes of In-System Programmable EEPROM. The device operates at a frequency of 20 MHz and is available in a 44-pin TQFP (Thin Quad Flat Package) package.

Features:

1. 64 Kbytes of In-System Programmable Flash memory with read-while-write capability
2. 4 Kbytes of In-System Programmable SRAM
3. 2 Kbytes of In-System Programmable EEPROM
4. 44 general-purpose I/O lines with optional internal pull-up resistors
5. 32 general-purpose working registers
6. Nested interrupt controller with 16 priority levels
7. On-chip debug system with JTAG and Serial Wire Debug (SWD) interface
8. Up to 40 MIPS throughput at 20 MHz
9. Internal and external interrupts with up to 16 sources
10. Three 16-bit timer/counters with input capture and compare modes
11. Eight-channel, 10-bit Analog-to-Digital Converter (ADC)
12. Two USARTs for serial communication
13. SPI and I2C serial interfaces
14. On-chip oscillator calibration for precise internal clock generation
15. Power-on reset and brown-out detection with programmable threshold
16. Sleep mode to reduce power consumption during periods of inactivity

Applications:

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

1. Industrial control and automation systems
2. Home automation and smart appliances
3. Medical devices and equipment
4. Portable electronics and battery-powered devices
5. Data acquisition and signal processing systems
6. Motor control and drive systems
7. Security systems and access control devices
8. Handheld devices and wearable electronics
9. Automotive control modules and telematics systems
10. Embedded systems in various consumer products

The ATMEGA644-20AU's combination of memory, I/O options, and communication interfaces makes it a popular choice for developers looking to create efficient and reliable embedded systems.

ATMEGA644-20AU Documents

Download datasheets and manufacturer documentation for ATMEGA644-20AU

PCN Assembly/Origin :

ATMEGAxx 02/Aug/2023      

Datasheets :

ATMEGA644/V Summary       ATMEGA644/V Datasheet      

PCN Packaging :

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

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