ATTINY3217-MN

Overview

The ATTINY3217-MN is an 8-bit AVR microcontroller from the tinyAVR 1-series, featuring a 20 MHz CPU with hardware multiplier. It includes 32 KB Flash, 2 KB SRAM, and 256 bytes EEPROM. The device supports up to 22 I/O lines in a 24-pin VQFN package. Key peripherals include a Peripheral Touch Controller (PTC), Event System (EVSYS), Configurable Custom Logic (CCL), three 8-bit DACs, two 10-bit ADCs, and multiple timers. Operating voltage ranges from 1.8V to 5.5V.

Feature Summary

• Integrates Core Independent Peripherals including PTC for capacitive touch sensing and CCL for custom logic implementation.
• Features an Event System (EVSYS) enabling direct peripheral-to-peripheral signaling without CPU intervention.
• Supports single-pin Unified Program and Debug Interface (UPDI) for programming and debugging.
• Includes advanced analog capabilities such as multiple voltage references, high-speed ADCs, and low-propagation delay comparators.

Applications

• Capacitive touch interface designs utilizing Driven Shield+ technology.
• Low-power sensor nodes requiring efficient inter-peripheral communication via EVSYS.
• Applications needing flexible custom logic implementation through CCL look-up tables.
• Control systems utilizing the 12-bit Timer/Counter Type D optimized for control applications.

Procurement Notes

Verify the specific suffix 'MN' corresponds to the 24-pin VQFN package and industrial temperature range (-40°C to +105°C). Confirm that the ordering code matches the exact memory size and speed grade required for your design. Ensure compatibility with UPDI-based debuggers as standard ISP programmers are not supported.

Selection Notes

Select this component when high integration of analog and touch features is required within a small footprint. The 32 KB Flash provides ample space for complex firmware compared to smaller variants. Consider the 24-pin VQFN package constraints for PCB layout. Evaluate the need for the Peripheral Touch Controller if capacitive sensing is part of the application requirements.

Part Context

This device belongs to the tinyAVR 1-series family, representing a modern evolution of the AVR architecture. It succeeds older series by offering enhanced peripheral sets like CCL and PTC while maintaining software compatibility with existing AVR toolchains. The 32 KB Flash variant offers the highest memory capacity in its pin-count class within this series.

Replacement Considerations

Direct replacements within the same package and feature set include the ATtiny3216, which shares identical peripherals but offers reduced Flash memory. Other members of the tinyAVR 1-series may serve as alternatives if pin count or memory requirements differ.