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PCM1860: EnergySense functionality

JatanNaik
Expert 4011 points

Part Number: PCM1860

Is there any documentation besides the datasheet on the EnergySense function, particularly on the PCM1860 (HW controlled)? 

It’s our understanding that in order for the PCM1860 to generate an interrupt, the device must be powered but in Sleep mode, wherein the I2S interface (BCK and LRCK) is inactive. Once input signal is detected by the EnergySense function, it triggers the interrupt, which will keep firing until the processor activates the I2S interface. Once BCK and LRCK are active (out of Sleep Mode),  the PCM1860 stops generating the input, right? We also want to verify that as long as the I2S bus is active, the EnergySense function is inactive and will not generate an interrupt.

Please advise. Thanks!

  • 0
    TI__Guru 57800 points

    Hi, Jatan,

    Unfortunately we don't have a specific documentation regarding energysense feature for the hardware controlled parts of the PCM186x family.

    Your understanding is correct, once the PCM1860 is put into sleep mode (remove I²S clocks), energysense will be enabled and the inputs will be monitored. When the input signal is detected, the device will trigger an interrupt for the host periodically until the clocks are provided. Once clocks are provided, the device enters in active mode and energysense is inactive.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer