AVR32DA28T-I/SO

Overview

The AVR32DA28T-I/SO is an 8-bit microcontroller from the AVR DA family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 32 KB of Flash memory, 4 KB of SRAM, and 512 B of EEPROM. The device operates within a voltage range of 1.8 V to 5.5 V and supports industrial temperatures from -40°C to +85°C. Key peripherals include a 12-bit ADC, three analog comparators, a 10-bit DAC, two zero-cross detectors, and a Peripheral Touch Controller. It utilizes a 28-pin SOIC package.

Feature Summary

• Supports Program and Debug Interface Disable (PDID) for secure firmware protection
• Integrates intelligent analog features including a 12-bit differential ADC and window compare functions
• Features a Peripheral Touch Controller with Driven Shield+ technology for capacitive touch applications
• Provides an Event System for CPU-independent inter-peripheral signaling

Applications

• Secure firmware upgrade implementations requiring code authentication
• Power control systems utilizing the 12-bit Timer/Counter type D
• Capacitive touch interfaces using buttons, sliders, or wheels
• Industrial monitoring devices operating in extended temperature ranges

Procurement Notes

Verify the specific ordering suffix 'T' indicates tape and reel packaging when sourcing components. Confirm that the 'I' suffix corresponds to the industrial temperature range of -40°C to +85°C. Ensure compatibility with the 28-pin SOIC physical footprint during procurement planning. Cross-reference the datasheet revision DS40002228C for accurate electrical specifications.

Selection Notes

Select this component for designs requiring vertical migration within the AVR DA(S) family without code modification. Consider the 28-pin pinout constraints compared to higher pin-count variants like the AVR32DA32. Evaluate the available General Purpose I/O count against interface requirements. Verify that the 32 KB Flash capacity meets application storage needs before choosing over larger memory options.

Part Context

This part belongs to the AVR® DA(S) family, which uses the latest Microchip technologies for flexible, low-power architectures. The family allows horizontal migration to reduce pin counts and vertical migration without code changes. The AVR32DA28 variant specifically offers a balance of memory and peripheral density suitable for compact embedded designs.

Replacement Considerations

AVR32DA28T-I/SS

FAQ

What is the maximum operating frequency of the AVR32DA28T-I/SO?

The device runs at up to 24 MHz using the High-Precision internal high-frequency Oscillator.

How does the PDID feature enhance security?

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

What analog peripherals are included in this microcontroller?

It includes one 12-bit differential ADC, three Analog Comparators with window compare functions, one 10-bit DAC, and multiple voltage references.