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TMS320C5517: Need to control five I2S devices

Brian Antheunisse
Expert 5305 points
Part Number: TMS320C5517
Other Parts Discussed in Thread: PCM1864, TIDA-01454

HI guys, 

My customer has five I2S devices he needs to control with a DSP of some sort, but we are a little fuzzy about how I2S works so we aren't sure if the C5517 can work. 

Essentially, he has four microphone codecs feeding audio data, and a speaker that will need to be fed audio data. Will we need five seperate I2S modules in our processor we end up choosing? 

Not sure of exact audio post-processing requirements, there will be some, but right now we are just trying to find a DSP/MPU with the right interfaces. 

Thanks,

Brian 

  • 0
    TI__Guru 65405 points
    Hi Brian,

    TMS320C5517 has Three Inter-IC Sound (I2S Bus) Modules for Data Transport. Some other c55x based DSPs like c5505, c5515, c5535 and c5545 have 4 I2S buses. Therefore you can not directly connect 5 I2S slave devices to C5517.
    I suggest you an example decision - The customer can use PCM1864 4-Channel Software-Controlled Audio ADC. PCM1864 supports up to 4 stereo microphones (8 analog inputs) and can be connected to c55x DSP via one I2S bus.
    www.ti.com/.../PCM1864
    Also the customer can use as reference design TIDA-01454 which represents PCM1864 based circular microphone board (CMB):
    www.ti.com/.../TIDA-01454

    Regards,
    Tsvetolin Shulev