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Product Detailed Parameters
- Description：32KB, 4KB SRAM, 24MHZ, USB, 10B
- Series：AVR® DU
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Core Processor：AVR
- Core Size：8-Bit
- Speed：24MHz
- Connectivity：CANbus, I2C, IrDA, SMBus, SPI, UART/USART, USB
- Peripherals：Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O：20
- Program Memory Size：32KB (32K x 8)
- Program Memory Type：FLASH
- EEPROM Size：256 x 8
- RAM Size：4K x 8
- Voltage - Supply (Vcc/Vdd)：1.8V ~ 5.5V
- Data Converters：A/D 17x10b
- Oscillator Type：External, Internal
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：28-VQFN (4x4)
- Package / Case：28-VFQFN Exposed Pad
- Grade：-
- Qualification：-
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Overview
The AVR32DU28T-I/STX is an 8-bit microcontroller from the AVR DU family, featuring a 32 KB Flash memory and 4 KB SRAM. It operates at clock speeds up to 24 MHz with a supply voltage range of 1.8 V to 5.5 V. The device includes a USB 2.0 full-speed interface, two USARTs, one SPI, and one TWI/I2C controller. It utilizes a 28-pin SSOP package and supports industrial temperature ranges from -40°C to +85°C.
Feature Summary
- Integrates a hardware multiplier and Program and Debug Interface Disable (PDID) for secure firmware protection.
- Supports crystal-less USB operation through auto-tuning of the internal high-frequency oscillator.
- Features genuine read-while-write capability in Flash memory for uninterrupted code execution during reprogramming.
Applications
- USB-enabled consumer electronics
- Industrial control systems requiring secure boot
- IoT devices with low-power requirements
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature grade. Ensure the component matches the preliminary data sheet specifications before integration into production designs.
Selection Notes
Select this model for applications requiring integrated USB connectivity without external transceivers. Consider the 28-pin form factor for space-constrained designs needing multiple communication interfaces and secure programming capabilities.
Part Context
This component belongs to the AVR DU family, which offers vertical migration compatibility across pin counts. It shares architectural similarities with other AVR MCUs but adds advanced digital peripherals and enhanced security features like PDID.
Replacement Considerations
AVR32DU28-I/SS serves as a tube-packaged alternative within the same series. Verify pinout and peripheral availability when substituting to ensure functional equivalence.
FAQ
Does the AVR32DU28T-I/STX support crystal-less USB operation?
Yes, the internal high-frequency oscillator can be tuned to the USB Start-of-Frames for crystal-less operation.
What is the function of the PDID feature?
Program and Debug Interface Disable prevents access to the device's reprogrammable Flash memory over the UPDI after activation.
