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Product Detailed Parameters
- Description：32KB,ECC,2XCPU,20MHZ,ERRCTRL,MVI
- Series：*
- Mfr：Microchip Technology
- Package：Tube
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- EEPROM Size：-
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- Voltage - Supply (Vcc/Vdd)：-
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- Oscillator Type：-
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- Mounting Type：-
- Supplier Device Package：-
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Overview
The AVR32SD28-E/SP is an 8-bit microcontroller from the AVR SD series, featuring a dual-core lockstep CPU architecture for functional safety. It integrates 32KB of system-in-programmable flash with ECC, 4KB of SRAM with ECC, and 256B of EEPROM with ECC. The device operates at clock speeds up to 20MHz and supports a supply voltage range of 2.7V to 5.5V. Key peripherals include two ADCs, three comparators, two zero-crossing detectors, two watchdog timers, three USARTs, two SPI interfaces, and two TWI interfaces. It is housed in a 28-pin SPDIP package.
Feature Summary
- Dual-core lockstep CPU configuration ensures high reliability and functional safety compliance.
- Integrated error correction codes (ECC) across flash, SRAM, and EEPROM enhance data integrity.
- Advanced digital peripherals including configurable custom logic and event systems enable flexible I/O management.
- Supports multiple low-power sleep modes to optimize energy consumption in battery-operated applications.
Applications
- Automotive safety systems requiring ISO 26262 ASIL C compliance
- Industrial automation controllers needing robust fault detection
- Medical devices demanding high reliability and secure boot
- Consumer electronics with enhanced security features
Procurement Notes
Verify the specific suffix 'SP' corresponds to the SPDIP package type as per the official datasheet. Confirm that the '-E' designation indicates the extended temperature range suitable for industrial or automotive environments. Ensure compatibility with programming tools supporting the UPDI interface. Check current availability status as this model may have limited distribution compared to standard variants.
Selection Notes
Select this component when functional safety standards such as ISO 26262 ASIL C are mandatory. The dual-core lockstep architecture provides redundancy critical for fail-safe operations. Choose this part over single-core AVRs if ECC protection for memory is required to prevent bit-flips. Consider the 28-pin SPDIP package only if through-hole mounting is necessary for mechanical stability.
Part Context
This MCU belongs to the AVR SD family, designed specifically for safety-critical applications. It combines the efficiency of the AVR CPU with hardware-based safety mechanisms like SECDED ECC and an error controller. The series is optimized for environments where system integrity and predictable behavior are paramount, distinguishing it from general-purpose AVR MCUs.
Replacement Considerations
Direct substitutes within the same package and pinout include other AVR32SD28 variants with different temperature grades or packaging options. Cross-series migration to AVR EA or LA families requires schematic and software adaptation due to peripheral differences. Verify that any replacement maintains the dual-core lockstep requirement if safety certification is involved.
