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TMS320C5517: discrete audio DSP for low power bluetooth system

Jay Jang
Intellectual 915 points
Part Number: TMS320C5517
Other Parts Discussed in Thread: CC2650

Is TMS320C5517 a suitable solution for a low power bluetooth device?

The customer would like discrete DSP with a minimum of 120MIPS.

Overview of the system is below:

  • Small size (high integration or distributed architectures are both considered)
  • Connection available to external programmable audio DSP: assuming I2S interface
  • (Very) Low power consumption in the benchmark use case (music playback over BT with SBC and AAC codecs)
  • Connection to external DSP IC: Digital microphone interfaces - not required to be integrated to the BT chipset
  • Speaker driver interfaces - this is either integrated in the BT chipset from TI or then ad external audio codec IC needs to be used and connect the speaker drivers to that
  • Interface to connect external audio codec: I2S or SPI
  • Battery will be 1S1P - small size 

Thank you,

Jay

  • 0
    TI__Mastermind 30365 points
    Hi Jay,

    The C5545 seems a better fit for this application. Please see (step 10) in the link below of an ifixit teardown of a device that uses the C5545 www.ifixit.com/.../49046

    The C5545 is a 120MHz device, and we have a Boosterpack eval board for it that has a CC2650 for BT.
    www.ti.com/.../BOOST5545ULP
    Youtube video on the Boosterpack: www.youtube.com/watch

    All the source code for diagnostics, examples and demos are avaialble via the C55x CSL which can be downloaded here software-dl.ti.com/.../index_FDS.html

    www.ti.com/.../TMS320C5545 (C5545 datasheet).

    The footprint for this device is 7x7mm, so pretty small and low power.
    Several I2S interfaces.
    Interfaces easily to microphones via an audio codec such as a AIC3206.

    How many mics are being considered for the design?
    Are there other audio algorithms such as voice triggering, noise reduction, dynamic range control that need to run on the C5545 DSP?

    Please see this TI design for a great working demo of the C5545 in a cloud based voice transcription application using IBM Watson www.ti.com/.../tidep-0083

    Hope this helps.

    Lali