Speech Recognition Reference Design on the C5535 eZdsp™
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Key Document


The TIDEP0066 reference design highlights the voice recognition capabilities of the C5535 and C5545 DSP devices using the TI embedded speech recognition (TIesr) library and instructs how to run a voice triggering example that prints a pre-programmed keyword on the C5535eZdsp OLED screen, based on a successful keyword capture.  This design also describes the steps to customize the trigger phrase.

  • Efficient active power for always listening applications
  • Small footprint (down to 7mmx7mm) with optimized pinout
  • Based on open source library
  • Enables addition of voice control to any application

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Schematic/Block Diagram

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TLV320AIC3204  Very-Low-Power Stereo Audio CODEC With PowerTune™ Technology  Audio converters  Sample & Buy View Design Kits & Evaluation Modules
TMS320C5535  Fixed-Point Digital Signal Processor  Digital signal processors (DSP)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TLV320AIC3204 Download Download
TMS320C5535 Download
(ZHH) | 144 Download -

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Technical documentation

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User guides (2)
Title Type Size (KB) Date
PDF 1617 17 May 2016
PDF 1605 03 Mar 2016
Design files (3)
Title Type Size (KB) Date
ZIP 1676 29 Mar 2016
PDF 33 29 Mar 2016
PDF 162 29 Mar 2016
Related Tools & Software

Hardware development (1)

Name Part Number Tool Type
C5535/C5545 eZdsp USB Stick Development Kit  TMDX5535EZDSP  Evaluation boards 

Software development (2)

Name Part Number Software Type
TMS320C55x Chip Support Libraries (CSL) – Standard and Low-Power  SPRC133  Drivers & libraries 

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