New Microchip MCU Family Tackles System Noise, Vibration, and Harshness

December 14, 2023 by Aaron Carman

Microchip’s newest MCUs include advanced timer/counter modules to streamline motor control, predictive maintenance, home automation, and more.

In an effort to reduce problems caused by noise, vibration, and harshness (NVH), Microchip has launched a new MCU family, AVR EB, targeting high-precision BLDC motor control. These devices are designed to remove the sources of noise and vibration entirely for more efficient motor control.



The latest Microchip MCU family targets improved motor control, reducing the impacts of noise, vibration, and harshness on electrical systems, including moving parts.

This article takes a closer look at the family's specs to get a sense of how the AVR EB family accomplishes NVH reduction for such control. We'll also examine the other peripherals of the MCUs to determine where an AVR EB MCU could be useful in various motor designs.


Smoother Motor Control

BLDC motors afford a high degree of control, allowing designers to reduce the impacts of NVH on device longevity. This advanced control, however, typically requires designers to develop complex control algorithms and waveform designs.


Timers with waveform extensions and event systems

Timers with waveform extensions and event systems enable designers to rapidly adjust BLDC waveform parameters, helping to remove the NVH problem in motor systems. 


To remove the complexity associated with BLDC motors, Microchip’s AVR EB family of MCUs incorporates speed, timing, and waveform control in a single chip, allowing designers to simplify the control process and further reduce NVH impacts in sensitive applications. In addition, the onboard processor supports more complex interaction with the entire system.


Hands-Free Event Handling

The AVR EB family (datasheet linked) includes a 20-MHz AVR CPU with 16 KB flash memory and 2 KB SRAM. Complementing the devices' motor driving performance is a 12-bit ADC with 300 kilo-samples per second (kSps). The 24-bit Timer/Counter F (TCF) joins the 16-bit Timer/Counter E to provide multiple options for waveform generation and event triggering.


The AVR EB block diagram

The AVR EB block diagram highlights the utility of the event system, allowing peripherals to directly interact without loading the CPU with repetitive tasks. 

The AVR EB family also includes a dedicated event-handling system designed to allow peripherals to interact without loading down the CPU. As a result, the peripherals included can use up to six event channels to automatically route data and handle events as needed, allowing designers to simplify repeatable actions without dedicated processing power.

The AVR EB family and a Curiosity Nano development board are currently available for designers looking to evaluate the performance of the chip in their own applications.


Smaller, Smarter Motors

The benefits of the AVR EB family combined with the small size make it useful for applications where space is constrained, allowing engineers to leverage the benefits of BLDC motors without needing bulky or power-hungry controllers. As a result, the AVR EB family may not only improve the performance of BLDC motors currently in products but also allow BLDC motors to be used in a wider variety of applications.

The reported performance of the AVR EB family and the incorporation of more peripherals may not only better automate advanced motor control but also allow designers to minimize the impacts of moving parts in solid-state systems.



All images used courtesy of Microchip