Atmel ATmega2561 8-Bit Microcontroller 256KB Flash SMD TQFP-64

The Atmel ATmega2561 8-Bit Microcontroller is a high-performance, low-power 8-bit AVR RISC-based device with 256 KB of in-system programmable flash memory for complex embedded applications.

Overview

The microcontroller combines 256 KB of in-system programmable (ISP) flash memory, 8 KB of SRAM and 4 KB of EEPROM, providing a robust memory configuration. It offers 86 general-purpose I/O lines and 32 general-purpose working registers, along with a real-time counter, six flexible timers/counters with compare modes and PWM, four USARTs, a byte-oriented 2-wire serial interface, an 8-channel 10-bit analogue-to-digital converter and a JTAG interface for on-chip debugging. Manufactured using Atmel's high-density non-volatile memory technology, the device achieves a throughput of 16 MIPS at 16 MHz and operates from 4.5 V to 5.5 V.

Key Features

• Advanced RISC architecture with 135 instructions, most executing in a single clock cycle
• 32 x 8 general-purpose working registers and fully static operation
• On-chip 2-cycle multiplier for efficient mathematical operations
• Programmable watchdog timer with a separate on-chip oscillator
• On-chip analogue comparator and interrupt with wake-up on pin change
• Master/Slave SPI, byte-oriented 2-wire (I2C) and JTAG (IEEE 1149.1 compliant) interfaces
• Output compare modulator and QTouch library support for capacitive touch sensing
• Six sleep modes (idle, ADC noise reduction, power-save, power-down, standby, extended standby) for power management
• Power-on reset

Programming and Power

The on-chip ISP flash allows program memory to be reprogrammed in-system via an SPI serial interface, a conventional memory programmer, or an on-chip boot program running on the AVR core. By executing instructions in a single clock cycle, the device approaches a throughput of 1 MIPS per MHz, balancing power consumption and processing speed.

Dimensions and Weight

• Width: 3.3
• Depth: 1.5
• Height: 4.3
• Weight: 6.667 g

Applications

Suited to complex embedded applications, this SMD TQFP-64 microcontroller combines flash, SRAM, EEPROM and a wide range of peripherals in a single device.