ATTINY3217-MNR

Overview

The ATtiny3217-MNR is an 8-bit microcontroller from Microchip's tinyAVR 1-series, utilizing the AVR processor with a hardware multiplier. It features 32 KB of in-system self-programmable Flash memory, 2 KB of SRAM, and 256 bytes of EEPROM. The device operates at clock speeds up to 20 MHz and supports supply voltages ranging from 1.8V to 5.5V depending on the speed grade. It is housed in a 24-pin VQFN package (4x4 mm) and includes extensive analog peripherals such as dual 10-bit ADCs, three 8-bit DACs, and multiple timers.

Feature Summary

• Integrated Peripheral Touch Controller (PTC) supporting capacitive touch interfaces with Driven Shield+ technology for improved noise handling.
• Core Independent Peripherals (CIPs) including a Real-Time Counter (RTC) and Timer/Counter Type D (TCD) optimized for control applications.
• Configurable Custom Logic (CCL) allowing flexible interconnection of peripherals without CPU intervention.
• Automated CRC memory scan capability to ensure data integrity within the Flash program memory.

Applications

• Sensor nodes requiring low power consumption and high responsiveness
• Applications involving capacitive touch user interfaces
• Control systems utilizing Core Independent Peripherals for background tasks
• Industrial environments demanding robust analog signal processing

Procurement Notes

Verify the specific speed grade suffix required for your voltage and frequency constraints before ordering. Confirm that the 24-pin VQFN package matches your PCB footprint design. Ensure development tools support the UPDI interface for programming and debugging. Check for any automotive qualification requirements if deploying in vehicle environments.

Selection Notes

Select this model when 32 KB of Flash memory is necessary compared to smaller variants in the series. Choose based on the need for advanced analog features like the PTC or multiple DACs. Consider the 24-pin VQFN package size constraints against available board space. Evaluate the requirement for Core Independent Peripherals to offload CPU tasks.

Part Context

This component belongs to the tinyAVR 1-series family, which emphasizes low power and advanced peripheral integration. It shares architectural similarities with the ATtiny3216 but offers increased memory capacity. The series utilizes the latest AVR technologies including the Event System and single-cycle I/O access for efficient processing.

Replacement Considerations

ATtiny3216-MNR serves as a direct pin-compatible alternative with reduced memory capacity. Verify software compatibility when migrating between devices with different Flash sizes. Ensure peripheral configurations remain valid across the memory variations within the same package type.