1 Features and Pinout

The AVR® SD microcontroller family, designed in compliance with the ISO 26262 functional safety standard, uses the latest technologies from Microchip Technology, integrating low-power architecture with an Event System, accurate analog features, and advanced digital peripherals. Additionally, the AVR® SD family features a dual-core lockstep CPU, Single-Error Correcting and Double-Error Detecting (SECDED) ECC on Flash, EEPROM and SRAM, Error Controller, and Program and Debug Interface Disable (PDID) for functional safety.

• AVR® CPU in Dual-Core Lockstep (DCLS) Configuration, running at up to 20 MHz
• 32 KB in-system-programmable Flash, 4 KB SRAM, 256B EEPROM with Error Correcting Code (ECC)
• Error Controller (ERRCTRL)
  • Central interface for fault detection
  • Fault handling in hardware according to programmable severity
  • Optional Heartbeat output
  • Optional tri-stating of all I/O pins in case of fault
• Programming and Debug Interface Disable (PDID) Security Functionality
• Parity of data buses
• Dual Watchdogs
• 6-channel Event System for predictable and CPU-independent inter-peripheral signaling
• One 16-bit Timer/Counter type A (TCA) with three compare channels for PWM and waveform generation
• Up to four 16-bit Timer/Counter type B (TCB) with input capture for capture and signal measurements
• One 12-bit Timer/Counter type D (TCD) optimized for power control
• One 16-bit Real-Time Counter (RTC) that can run from an external crystal or internal oscillator
• Serial Communication interfaces: Up to three USARTs, two SPI, two I2C
• One Configurable Custom Logic (CCL) with up to six programmable Lookup Tables (LUTs)
• Two 10-bit, 170 ksps, Analog-to-Digital Converters (ADC)
• Three Analog Comparators (AC)
• Two Zero Cross Detectors (ZCD)

• AVR32SD32 Microcontroller
• USB Type-C® Connector
• One Yellow User LED
• One Mechanical User Switch
• One green power and status LED
• One 32.768 kHz Crystal
• One 20 MHz Crystal
• Diffused dual-color LED for heartbeat status
  • Different colors for pin high, pin low, and heartbeat signal enabled
• On-Board Debugger support in Microchip MPLAB® X IDE:
  • Board identification
  • Virtual serial port (CDC)
  • Programming and debugging
  • Two debug GPIO channels (DGI GPIO)
• USB Powered
• Adjustable Target Voltage:
  • MIC5353 LDO regulator controlled by the on-board debugger
  • 2.7–5.1V output voltage (limited by USB input voltage)
  • 500 mA maximum output current (limited by ambient temperature and output voltage)

All the AVR32SD32 I/O pins are accessible at the edge connectors on the board. The image below shows the board pinout. Refer to the I/O Multiplexing and Considerations section in the AVR32SD32 data sheet for all available functions on each pin.