Class D ToolStick Evaluation Kit


The ToolStickClassD evaluation kit demonstrates direct-drive Class D amplification using the SiM3U1xx high-drive I/O. The kit highlights the integrated USB 2.0 full-speed transceiver, internal oscillator and phase-locked loop (PLL), up to 300 mA high-drive I/O, dual ADCs, enhanced PWM timer and capacitive sensing. The evaluation kit includes a 1 W Class D amplifier and a speaker.

Transition between four input modes including:

  • USB audio
  • Portable media player and phone
  • Factory-programmed sound clips
  • Voice recording and playback

Mode transition is done via capacitive touch buttons, and volume is controlled via a capacitive touch slider. The board is fully powered through USB using the SiM3U1xx MCU’s internal 5 V regulator and uses the integrated USB oscillator for crystal-less operation.

Class D ToolStick Resources

AN726: Utility Class D ToolStick User's Guide

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Class D ToolStick Kit Quick Start Guide

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Class D Example Code

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Precision32™ Development Suite

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Adding Class D Audio to Embedded Systems White Paper

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