8-bit flash microcontrollers

Atmel Corporation has introduced five new flash microcontrollers targeted at applications that require a large code space.

The ATmega640, ATmega1280 and ATmega2560 microcontrollers come in a 100-pin housing, while the ATmega1281 and ATmega2561 devices are available in a 64-pin package.

The 100-pin versions include 4 UART channels, 16 Analog-to-Digital Converter channels and 16 Pulse Width Modulation channels, while the 64-pin devices integrate 2 UART channels, 8 Analog-to-Digital Converter channels and 10 PWM channels.

The 1.8V devices all feature 64 to 256kBytes of flash program memory and 8 kBytes of on-chip RAM. All the devices have a linear address range up to 8 MBytes.

An integrated 8 MHz RC oscillator on the devices can be calibrated to an accuracy of +/-2%, thus avoiding the need for an external crystal in many applications. A watchdog timer running from an independent RC oscillator and a brown-out detector with programmable detection level are also included.