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MCUs reduce chip requirements

Posted: 15 Mar 2005 ?? ?Print Version ?Bookmark and Share

Keywords:avr flash microcontroller? mcu? atmel? chip? atmega640?

The five new low power AVR flash microcontrollers (MCUs) from Atmel Corp. promise to reduce complete system chip count requirements. The integrated 8MHz RC oscillator can be calibrated to an accuracy of 2 percent, thus avoiding the need for an external crystal in many applications. Additionally, a watchdog timer running from an independent RC oscillator, and a brown-out detector with programmable detection level is included.

The ATmega640, atmega1280 and atmega2560 come in a 100-pin housing, while the atmega1281 and ATmega2561 has 64 pins. These devices feature 64KB to 256KB of Flash program memory, and 8KB of on-chip RAM. With their linear address range, up to 8MB, the AVR devices handle this amount of memory with no paging.

"The 1.8V operation and variety of low power modes, such as the 100nA power down mode, significantly increases battery life in applications requiring large amounts of code memory," said AVR Marketing Manager Odd Jostein Svendsli. "The high C-code density of the AVR MCUs further increases battery life by reducing the number of instructions, hence the time and energy needed to perform each control task of the MCU," he added.

The 100-pin versions include 4 UART channels, 16 ADC channels and 16 Pulse Width Modulation channels, while the 64-pin devices integrate 2 UART channels, 8 ADC channels and 10 PWM channels. Targeted at applications requiring a large code space and extensive interfacing capability, these new products have a maximum performance of 16MIPS at 16MHz.

Both the ATmega2561 and ATmega2560 are available for samples today, with production scheduled to start in 3Q 2005. The remaining three devicesthe ATmega640, ATmega1280 and ATmega1281, will be sampled in 2Q 2005, with volume production in 4Q 2005.

Pricing for 10,000 units starts at $4.75 for the ATmega640, $6 for the ATmega1281, $6.40 for the ATmega1280, $7.50 for the ATmega2561 and $7.80 for the ATmega2560. A complete development package, which includes evaluation and debug tools, is also available to help designers develop their new applications.

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