Microchip Technology has introduced a new family of 8-bit microcontrollers, the AVR DU family, with advanced code protection and 15W of power delivery for USB interfaces. This innovative launch aims to bring the benefits of USB to a wider range of embedded systems.

The AVR DU family incorporates Microchip’s Program and Debug Interface Disable (PDID) with 15W of USB power delivery. The enhanced code protection feature is designed to secure firmware by locking out access to the programming/debugging interface, thereby preventing unauthorized attempts to read, modify, or erase the firmware.

Furthermore, the family employs Read-While-Write (RWW) Flash and, when combined with a secure bootloader, allows for secure firmware updates. This functionality enables designers to use the USB interface for patching bugs, addressing security concerns, and adding new features without disrupting product operation. Such in-field updates are designed to extend the lifetime value of products.

Notably, the AVR DU 8-bit MCUs support power delivery of up to 15W from the USB interface, a capability uncommon in other USB microcontrollers within its class. This feature facilitates USB-C® charging with currents up to 3A at 5V, making the MCUs suitable for devices like portable power banks and rechargeable toys.

Greg Robinson, corporate vice president of Microchip’s 8-bit MCU business unit, emphasized the significance of USB as the standard communication protocol and power delivery method for electronic devices. He stated, ‘Microchip’s AVR DU family combines the flexibility of our most advanced 8-bit MCUs with the versatility of enhanced power delivery to bring the benefits of USB to a wider range of embedded systems.’

In addition to the power delivery capabilities, the AVR DU family contributes to cost reduction in overall design and Bill of Material (BOM) costs. This is achieved through a USB clock recovery feature, eliminating the need for a costly external crystal. The incorporation of Core Independent Peripherals (CIPs) onto a single-chip solution helps save board space and reduce design effort.

The family is targeted at developers of various embedded designs, including fitness wearables, home appliances, agricultural, and industrial applications. A virtual demonstration of the AVR DU family is available at try.microchip.com.

MPLAB® Code Configurator (MCC) contains a software stack that supports hardware features for the AVR DU MCU’s USB module. Integrated into the MPLAB development tools system, the production-ready USB software stack is easily configured by MCC Melody, streamlining the development process.