AVR32DU32-I/RXB

Overview

The AVR32DU32-I/RXB is an 8-bit microcontroller from the AVR DU family, featuring a hardware multiplier CPU running at up to 24 MHz. It includes 32 KB of in-system self-programmable Flash with read-while-write capability, 4 KB of SRAM, and 256 bytes of EEPROM. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports industrial temperatures from -40°C to +85°C. Key peripherals include a USB 2.0 full-speed device interface, two USARTs, one SPI, one TWI/I2C, a 10-bit ADC with 21 channels, and an analog comparator. It utilizes a single-pin Unified Program and Debug Interface (UPDI) for programming.

Feature Summary

• Integrates a USB 2.0 full-speed device-compliant interface supporting crystal-less operation via internal oscillator tuning.
• Features a genuine read-while-write Flash memory section allowing code execution during reprogramming.
• Includes a programmable Event System for CPU-independent inter-peripheral signaling.
• Provides Configurable Custom Logic (CCL) with four programmable Look-up Tables.

Applications

• USB-enabled embedded control systems
• Industrial communication nodes requiring RS-485 or LIN client modes
• Battery-powered devices utilizing low-power sleep modes
• Applications requiring secure firmware updates via Boot Code sections

Procurement Notes

Verify the specific ordering suffix RXB confirms the 32-pin VQFN package type. Confirm the 'I' suffix indicates the industrial temperature range (-40°C to +85°C). Ensure the datasheet version matches the required revision for peripheral register definitions. Check for any preliminary status notes if sourcing early samples.

Selection Notes

Select this component when a USB interface is required alongside standard serial communications like UART and I2C. The 32 KB Flash and 4 KB RAM suit moderate complexity applications. Consider the VQFN package constraints for thermal management and PCB layout. Verify that the 10-bit ADC resolution meets signal acquisition requirements.

Part Context

This part belongs to the AVR DU family, which offers vertical migration compatibility within the series. It shares architectural similarities with other AVR 8-bit MCUs but adds advanced features like the USB controller and Event System. The device is designed for cost-sensitive applications needing flexible I/O and robust security features.

Replacement Considerations

AVR32DU32-I/PT: Same electrical specifications and pinout compatibility, differing only in the TQFP package style instead of VQFN.

FAQ

What is the maximum clock speed of the AVR32DU32-I/RXB?

The AVR32DU32-I/RXB runs at a maximum clock frequency of 24 MHz.

Does this microcontroller support simultaneous host and client operations on its I2C interface?

Yes, the TWI/I2C interface supports dual mode operation, allowing simultaneous host and client functionality on different pins.