Tiny MCUs boast larger memory capacity and advanced analog functions

By Warren Miller, contributing writer

Microchip Technology Inc. (MCHP) recently introduced two new additions to its family of tinyAVR microcontrollers (MCUs) that boast larger memory capacity and more sophisticated analog functions than their predecessors. With two analog-to-digital converters (ADCs) and enhanced safety features, the ATtiny3216 and the ATtiny3217 enable engineers to design reliable sensor node applications capable of functioning in extreme conditions.

The two newest members of the tinyAVR MCU series both operate at up to 5 V and feature 32 KB of flash memory, more than enough space for a developer’s application code without creating a cumbersome physical footprint on the PCB. They also include safety features designed to detect and correct drops or variations in voltage such as the power-on-reset (POR), voltage level monitor (VLM), and the windowed watchdog timer (WWDT).

The pair of ADCs can either be used independently or in harmony to sample voltage and current signals, improving real-time accuracy and performance. While one ADC is working with the peripheral touch controller to acquire touch signals, the other can be monitoring additional inputs from heat and pressure sensors. Additionally, both devices are available in 125°C variants for reliable performance in harsh environments.

Source: Microchip Technology.

As sensor deployments expand, their use in harsh environments may become the norm rather than the exception. The convenience of deploying sensors in varying conditions without worrying about temperature or humidity makes it possible to create wide sensor networks for an expanding set of applications. Consider sensor use in industrial applications in which the environment can include temperature extremes, dust, and vibration. Sensors able to tolerate these extremes and still deliver robust responses to touch inputs as well as accurate environmental readings will be a must. Automotive applications can produce even harsher environments while requiring higher levels of safety and reliability.

“We continue to invest in bringing new AVR MCUs to the market with advanced features that meet our customers’ needs while easing the development process,” said Steve Drehobl, vice president of Microchip’s MCU8 division, in a statement. “The combination of responsive touch sensing and built-in safety functions make it easier for designers to improve the user experience in applications such as home appliances, automotive, and industrial automation.”

Development tools supported include Atmel Studio 7 integrated development environment (IDE) and the Atmel START code configurator. The ATtiny3217 Xplained Pro evaluation kit is also available for evaluation purposes. The eval kit (ATTINY3217-XPRO) is priced at $38.

The ATtiny3217 and ATtiny3216 are available for sampling and volume production starting at $0.68 each in quantities of 10,000.