Atmel has added two new members to its tinyAVR Flash microcontroller family with on-chip debug capability. The tiny13 and tiny2313 are designed to address the requirements of battery operated and portable applications by offering low power consumption and a high level of system integration in a small package.
These new AVR devices combine a code efficient and powerful microcontroller with low power flash memory technology. The debugWIRE interface enables on-chip debug, a feature usually available only on much larger devices. As system designers face increasing pressure to bring products to market on shorter development times, production has to start before software development is completed. On-chip debug gives the designer the opportunity to do full debugging on the finished product. The debugWIRE uses the reset line for electrical connection; hence the system designer does not have to sacrifice I/O capabilities to take advantage of the system. DebugWIRE enables on chip debug of 8-bit micro-controller devices in small pin count packages. The 8-pin tiny13 and tiny2313 do not have enough I/O lines to effectively support JTAG interface, which requires four I/Os.
These two devices include numerous features. Integrated brown-out detection removes an external component from the system. The on-chip calibrated RC oscillator may eliminate the external crystal or resonator. The significantly lower power consumption may reduce the cost of the power supply, or extend battery lifetime - the devices can also operate down to 1,8 V. Typical power consumption at 1 MHz, 1,8 V is less than 300 µA, at 32 kHz less than 20 µA. Self programmable flash lets the AVR write to its own program memory, enabling remote updates of the program and parameter storage in the flash memory. The tiny13 and tiny2313 can run at clock speeds up to 16 MHz at 5 V.
Additionally, the tiny2313 has 2 KB of Self Programing Flash memory plus 128 bytes of EEPROM and SRAM plus 18 I/O lines and as many as four PWM channels. The tiny13 has half the memory density and I/O lines plus a 4 channel 10 bit A/D converter.
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