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Disconnecting DAI

emenrique
on Jan 21, 2021

Hi,

I wanted to ask how one can disconnect the DAI that was previously connected to a SPORT Frame Sync. 

We know already how to connect a DAI line such as:

SRU(LOW, DAI0_PBEN12_I);  // make dai 12 as an input

SRU(DAI0_PB12_O, SPT0_AFS_I);  // connect dai 12 to sport 0 FS 

My question is now to disconnect the DAI line later. This is to produce the effect that even there 

is an external signal present, the SPORT FS does not accept the electrical transition thus the 

SPORT cannot run. 

Thank you in advance. 

eenrique

  • 0
    •  Analog Employees 
    on Feb 24, 2021 10:26 AM 4 days ago

    Hi,

    Sorry for the delayed response.

    A pin buffer is similar to a small buffer amplifier that can source enough current to drive the pin and a trace on the circuit board:

    when its enable input is logic high, the logic value at the pin buffer input is driven onto the pin buffer output.
    When its enable input is logic low, the buffer amplifier is high impedance, and the logic level of the pin buffer output is easily controlled by an external source.

    Regards,
    Anand Selvaraj.