Reference Design using TMS320C6657 to Implement Efficient OPUS Codec Solution


Design files


The TIDEP0036 reference design provides an example of the ease of running TI optimized Opus encoder/decoder on the TMS320C6657 device. Since Opus supports a a wide range of bit rates, frame sizes and sampling rates, all with low delay, it has applicability for voice communications, networked audio and even high performance audio processing application.   This design also highlights the performance improvements achieved when implementing the Opus codec on a DSP vs. a general purpose processor, like ARM.  Depending upon the level of optimization of the code running on the genral purpose processor, implementing the Opus Codec on a C66x TI DSP core can have 3X the performance of an ARM CORTEX A-15 implementation. TMS320C66x DSPs support both audio and video codecs.

  • This reference design is tested and includes hardware reference(EVM), software (Opus Codec package), users guide.
  • TMDSEVM6657 Lite EVM for high performance, cost-efficient, standalone development platform, using the TMS320C6657 high performance DSP based on TI's C66x Keystone multicore architecture. This design includes schematics, design files and bill of materials.
  • TI optimized Opus codec on the TI C66x DSP Core. The Opus codec package includes the codec,  along with test application and user guides, as well as documentation.
  • Users guide, including how to get started, as well as performance benchmarks vs. ARM® Cortex®-A15.
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUA45.PDF (992 K)

Reference design overview and verified performance test data

TIDRFB2.PDF (1717 K)

Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRFB5.ZIP (1728 K)

Files used for 3D models or 2D drawings of IC components

TIDCAH0.ZIP (9013 K)

Design file that contains information on physical board layer of design PCB

TIDRFB4.ZIP (4763 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AND gates

SN74LVC1G081-ch, 2-input 1.65-V to 5.5-V 32 mA drive strength AND gate

Data sheet: PDF
Buck converters (integrated switch)

TPS542313.5 to 28V Input, 2A, 570kHz Step-Down Converter with Eco-mode™

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS546204.5-V to 17-V, 6-A synchronous SWIFT™ buck converter

Data sheet: PDF | HTML
Clock generators

CDCE620055/10 outputs clock generator/jitter cleaner with integrated dual VCO

Data sheet: PDF | HTML
Digital power control drivers & powertrain modules

UCD7242Digital Dual Synchronous Buck Power Driver

Data sheet: PDF
Digital power isolated controllers

UCD9222Dual phase digital PWM buck controller with 4/6/8-bit parallel VID

Data sheet: PDF
Digital signal processors (DSPs)

TMS320C6654High performance single-core C66x fixed and floating-point DSP- up to 850MHz

Data sheet: PDF | HTML
Digital signal processors (DSPs)

TMS320C6655High performance single-core C66x fixed and floating-point DSP- up to 1.25GHz

Data sheet: PDF | HTML
Digital signal processors (DSPs)

TMS320C6657High performance dual-core C66x fixed and floating-point DSP- up to 1.25GHz, 2 UART

Data sheet: PDF | HTML
Direction-controlled voltage translators

SN74AVC4T245Four-bit dual-supply bus transceiver with configurable voltage-level shifting

Data sheet: PDF | HTML
I2C & I3C level shifters, buffers & hubs

PCA93062-bit bidirectional 400-kHz I2C/SMBus voltage level translator

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7371-A, ultra-low-dropout voltage regulator with reverse current protection & enable

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F543518 MHz MCU with 192KB Flash, 16KB SRAM, 12-bit ADC, DMA, UART/SPI/I2C, timer, HW multiplier

Data sheet: PDF | HTML
Multi-channel ICs (PMICs)

TPS512003A Sink/Source DDR Termination Regulator w/ VTTREF Buffered Reference for DDR2, DDR3, DDR3L and DDR4

Data sheet: PDF | HTML
NAND gates

SN74AHC004-ch, 2-input, 2-V to 5.5-V NAND gates

Data sheet: PDF | HTML
Noninverting buffers & drivers

SN74ALVC1254-ch, 1.65-V to 3.6-V buffers with 3-state outputs

Data sheet: PDF
Noninverting buffers & drivers

SN74LVC1G07Single 1.65-V to 5.5-V buffer with open-drain outputs

Data sheet: PDF | HTML
OR gates

SN74AUC1G321-ch, 2-input 0.8-V to 2.7-V ultra-high-speed (2.4 ns) OR gate

Data sheet: PDF | HTML
OR gates

SN74LVC1G321-ch, 2-input 1.65-V to 5.5-V 32-mA drive strength OR gate

Data sheet: PDF | HTML
Protocol-specific switches & muxes

TS3L3013.3-V, 2:1 (SPDT), 8-channel gigachannel LAN switch

Data sheet: PDF
RS-232 transceivers

MAX3221E3- to 5.5-V single channel 250kbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

Data sheet: PDF | HTML
Supervisor & reset ICs

TPS3808Low-quiescent current supervisor with programmable delay & manual reset

Data sheet: PDF | HTML

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Evaluation board

TMDSEVM6657LS — TMS320C6657 Lite Evaluation Modules

The TMS3206657 Lite Evaluation Module (EVM), is an easy-to-use, cost-efficient development tool that helps developers quickly get started with designs using the C6657 or C6655 or C6654 family of DSPs. The EVM includes an on-board, single C6657 processor with robust connectivity options that allows (...)

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Technical documentation

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Type Title Date
* Design guide Using the TMS320C6657 to Implement Efficient OPUS Codec Solution Design Guide Jun. 16, 2015
User guides BIOS MCSDK User Guide Jun. 26, 2015
User guide TMDXEVM6657L/LE/TMDSEVM6657LS Technical Reference Manual May 11, 2012

Related design resources

Software development

C66XCODECS CODECS- Video, Speech - for C66x-based Devices

Support & training

TI E2E™ forums with technical support from TI engineers

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