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AVR Flash MCUs tailored for battery-powered equipment

Posted: 08 Dec 2005 ?? ?Print Version ?Bookmark and Share

Keywords:Atmel? AVR Flash microcontroller? mcu? ATtiny24? ATtiny44?

Atmel Corp. announced three new members of its AVR Flash Microcontroller (MCU) family, targeting battery chargers, sensor end-points and low-end control applications.

The three new 14-pin tinyAVR products are pin compatible, can deliver 20MIPS throughput when running at 20MHz, and differ only in the size of Flash, EEPROM and SRAM memory. The ATtiny24 has 2KB of self-programmable Flash memory, while the ATtiny44 and ATtiny84 have 4KB and 8KB, respectively.

According to the company, these three devices excel in battery-powered equipment due to the inherent low power consumption and three individually selectable low power sleep modes. The application software can adjust the system clock frequency to achieve top performance when needed, and then slow down the clock during idle times. Additional power saving is achieved by using the AVR power stop system, allowing the user to turn off timers, USI, and/or ADC when not in use. This allows the MCUs to consume less than 100nA in Power Down mode.

The ATtiny24/44/84 also feature internal EEPROM, pull-up resistors and an 8MHz, high precision calibrated RC Oscillator, leaving 12 general I/O pins available for application use. The I/O pins can alternatively work as ADC inputs or pulse width modulation (PWM) outputs depending on the application requirements.

The devices include one 8bit timer and one 16bit timer, which can control two 8bit and two 16bit PWM outputs, respectively. A total of twelve 10-bit, differential A/D converter input channels with programmable gain and a fast analog comparator allow a wide selection of peripherals to be connected when used in sensor and control applications.

Samples of the ATtiny24 are available in Green SOIC and PDIP 14-pin packages and in Green QFN 20-pad package. ATtiny44 samples will be available in 1Q 2006, and ATtiny84 samples in 2Q 2006. Volume production of the ATtiny24 and ATtiny44 will commence in 1Q 2006, and for ATtiny84 in 2Q 2006. The ATtiny24, ATtiny44 and ATtiny84 are priced at 70 cents, 85 cents and $1.10 for 10,000-unit quantities, respectively.

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