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Product Detailed Parameters
- Description：32KB,ECC,2XCPU,20MHZ,ERRCTRL,MVI
- Series：*
- Mfr：Microchip Technology
- Package：Tube
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Overview
The AVR32SD20-I/SS is an 8-bit microcontroller from Microchip Technology, featuring the AVR core with a dual-core lockstep (DCLS) configuration for functional safety. It operates at clock speeds up to 20 MHz within a voltage range of 2.7 V to 5.5 V. The device includes 32 kB of system-in-programmable Flash memory with ECC, 4 kB of SRAM with ECC, and 256 B of EEPROM with ECC. It provides 15 I/O pins in a 20-SSOP package and supports interfaces including USART, SPI, and TWI.
Feature Summary
- Dual-core lockstep CPU architecture ensures high reliability and functional safety compliance.
- Integrated error correction codes (ECC) protect program memory, data RAM, and EEPROM.
- Multi-voltage I/O capability allows flexible interfacing with various logic levels.
- Comprehensive peripheral set includes multiple timers, comparators, and ADC channels.
Applications
- Automotive safety systems requiring ISO 26262 ASIL C compliance
- Industrial automation controllers demanding high reliability
- Medical devices with strict safety certification requirements
Procurement Notes
Verify the specific suffix against official datasheets to confirm package type and temperature grade. Ensure compatibility with programming tools supporting the UPDI interface. Confirm availability through authorized distributors as supply chains may vary. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.
Selection Notes
Select this component when functional safety standards such as ISO 26262 are mandatory. The dual-core architecture is essential for applications requiring fault detection and mitigation. Consider the 20-SSOP package constraints for PCB layout. Evaluate if the 20 MHz speed and 32 kB memory meet project requirements compared to higher-end variants in the SD series.
Part Context
This part belongs to the AVR32SD family, designed specifically for safety-critical applications. It integrates hardware security features like PDID and error controllers. The series shares architectural similarities with other AVR MCUs but adds robust safety mechanisms suitable for automotive and industrial environments where system integrity is paramount.
Replacement Considerations
Direct substitutes within the same package and pinout include other members of the AVR32SD20 series with different suffixes indicating varying temperature ranges or packaging options. Cross-series replacements require careful verification of pin compatibility and peripheral mapping due to architectural differences.
