Embedded designers easily implement USB functionality into a wider range of systems

Microchip Technology has launched the AVR DU family of MCUs. As the next generation of its 8-bit MCUs to integrate USB connectivity, the AVR DU family is designed to deliver enhanced security features and higher power delivery than previous iterations.

“USB is the standard communication protocol and power delivery method for electronic devices,” said Greg Robinson, corporate vice president of Microchip’s 8-bit MCU business unit. “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.”

AVR DU MCUs support power delivery of up to 15W from the USB interface, a capability not typically found in other USB MCUs within its class. This feature enables USB-C charging with currents up to 3A at 5V, making these MCUs an excellent choice for devices like portable power banks and rechargeable toys.

To strengthen its defence against malicious attacks, the family incorporates the company Program and Debug Interface Disable (PDID) feature. When enabled, the enhanced code protection is developed to lock out access to the programming/debugging interface and block unauthorized attempts to read, modify or erase firmware. To enable secure firmware updates, the family employs Read-While-Write (RWW) Flash, and when combined with a secure bootloader, designers can use the USB interface for patching bugs, addressing security concerns and adding new features without disrupting product operation. This updated functionality in the AVR DU MCUs is designed to allow for uninterrupted, in-field updates to help extend the lifetime value of products.

Also, the family helps lower overall design and BOM costs through a USB clock recovery feature, eliminating the need for a costly external crystal. CIPs enable designers to incorporate main device functions and system management tasks onto a compact, single-chip solution, saving board space and reducing design effort.

Developers of a wide range of embedded designs, from fitness wearables and home appliances to agricultural and industrial applications, can benefit from including the highly efficient AVR DU MCUs in their designs.