AVR32DU32-I/PT

Overview

The AVR32DU32-I/PT is an 8-bit microcontroller from the AVR DU family, featuring a hardware multiplier and operating at clock speeds up to 24 MHz. It includes 32 KB of in-system self-programmable Flash memory with read-while-write capability, 4 KB of SRAM, and 256 bytes of EEPROM. The device provides 25 programmable I/O pins within a TQFP-32 package. Key peripherals include a USB 2.0 full-speed device interface, two USARTs, one SPI, one TWI, a 10-bit ADC with 21 channels, and an analog comparator.

Feature Summary

• Supports USB 2.0 full-speed device communication for crystal-less operation when tuned to Start-of-Frames.
• Features Program and Debug Interface Disable (PDID) to prevent unauthorized access to reprogrammable Flash memory via UPDI.
• Includes an Event System for CPU-independent inter-peripheral signaling and Configurable Custom Logic with four Look-up Tables.

Applications

• USB-enabled embedded applications requiring full-speed data transfer.
• Industrial control systems utilizing RS-485 or LIN client modes via USART.
• Low-power designs leveraging multiple sleep modes and automated CRC Flash memory scanning.

Procurement Notes

Verify the specific datasheet revision DS40002576A during procurement, as this component is listed under preliminary documentation status. Confirm that the ordering suffix -I/PT corresponds to the industrial temperature range and TQFP package type required for your design. Ensure compatibility with the Unified Program and Debug Interface (UPDI) programming tools provided by Microchip Technology.

Selection Notes

Select this model when a 32-pin footprint is required alongside integrated USB connectivity. It serves as a direct vertical migration option within the AVR DU family without code modification. Consider the 10-bit ADC resolution and 21 available channels if analog signal acquisition is necessary. Verify power supply requirements, noting that the USB function operates only above 3.0V.

Part Context

This part belongs to the AVR DU family, which shares pin and feature compatibility across variants. The AVR32DU32 variant specifically offers 32 KB of Flash and 4 KB of SRAM. It utilizes the AVR CPU architecture with single-cycle I/O access. The family supports horizontal migration to lower pin counts but maintains software compatibility for upward transitions.

Replacement Considerations

AVR32DU28-I/PT

FAQ

Can the USB function operate without an external crystal?

Yes, the internal high-frequency oscillator can be tuned to the USB Start-of-Frames for crystal-less operation, provided the VDD is above 3.0V.

How does the PDID feature enhance security?

PDID prevents access to the device's reprogrammable Flash memory over the UPDI after activation, protecting against remote attacks and unauthorized code modifications.