AVR32DB32-I/RXB

Overview

The AVR32DB32-I/RXB is an 8-bit microcontroller from the AVR DB family, featuring a 32 KB Flash memory, 4 KB SRAM, and 512 bytes of EEPROM. It operates at a maximum clock frequency of 24 MHz within a supply voltage range of 1.8 V to 5.5 V. The device includes a 12-bit ADC with 13 channels, a 10-bit DAC, three analog comparators, two zero-cross detectors, and up to three op amps. Communication interfaces include USART, SPI, and TWI/I2C. It utilizes a single-pin UPDI for programming and debugging, housed in a 32-VQFN package.

Feature Summary

• Features Multi-Voltage I/O (MVIO) on Port C for flexible voltage threshold selection
• Includes Configurable Custom Logic (CCL) with programmable Look-up Tables for custom digital logic
• Supports CPU-independent inter-peripheral signaling via the Event System
• Integrates Analog Signal Conditioning peripherals including op amps with internal resistor ladders

Applications

• Industrial control systems requiring robust analog signal processing
• Power control applications utilizing PWM timers and zero-cross detection
• Embedded devices needing low-power operation with multiple sleep modes
• Systems requiring high-precision timing and event-driven architecture

Procurement Notes

Verify the specific suffix RXB confirms the 32-VQFN package style and the I suffix indicates the industrial temperature range (-40°C to +85°C). Ensure compatibility with the AVR DB family pinout if migrating from other variants. Confirm RoHS compliance status through official Microchip documentation prior to final procurement decisions.

Selection Notes

Select this component when a balance of 8-bit simplicity and advanced analog peripherals is required. It is suitable for designs needing MVIO flexibility and CCL capabilities without moving to 32-bit architectures. Consider the 24 MHz performance limit and 32 KB memory capacity against application requirements before choosing over larger flash variants like the AVR64DB32.

Part Context

This part belongs to the AVR DB family, which emphasizes vertical migration compatibility across pin counts. It shares architectural similarities with the AVR DD and AVR SD families but offers distinct peripheral sets such as the specific combination of TCA, TCB, and TCD timers. The device supports seamless code migration within the DB series.

Replacement Considerations

AVR32DB32-I/PT: Same core specifications but in a TQFP package instead of VQFN.

FAQ

What is the function of the MVIO feature?

Multi-Voltage I/O allows Port C pins to operate with selectable input voltage thresholds, enabling compatibility with different logic voltage levels without external level shifters.

How does the Event System benefit the AVR32DB32?

It enables CPU-independent communication between peripherals, allowing for predictable and low-latency responses to events without consuming processor cycles.

What programming interface does this MCU use?

The AVR32DB32 uses a single-pin Unified Program and Debug Interface (UPDI) for both in-system programming and debugging functions.