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PCM1754-Q1: Basic Question about ZEROA

NOBUO FUJIHARA
Genius 9705 points

Part Number: PCM1754-Q1
Other Parts Discussed in Thread: PCM1754

Hi team,

Sorry for the fundamental question, could you show the purpose and usage of ZEROA output?

Best regards,

Nobuo Fujihara

  • 0
    TI__Mastermind 28075 points

    Hello Fujihara-San,

    Thank you for reaching out to us.

    The ZEROA output pin is set high if the PCM1754-Q1 receives 0 for both the left and right channel for 1024 LRCK periods.

    This output can be connected to an MCU and used to indicate that no audio is playing or being received by the PCM1754. People typically use this information to mute/disable any additional circuitry such as speakers, so you do not have any analog noise playing when no audio signal is present. 

    Best Regards,
    Brandon Fisher