TAS5731M: How the MCLK pin is connected when not used

Leo Ma

Intellectual 1956 points

Part Number: TAS5731M

Hi，

In the design, the MCLK is not used. So, how the MCLK pin is connected?

Can it be connected to the ground or floating?

Can it be connected to the Capacitance to ground as shown in the picture?

Thank you so much!

over 2 years ago

0 Shadow He over 2 years ago

TI__Mastermind 41720 points

Hi Leo

The MCLK seems quite essential for this device. What is the mode and clock frequency are we using? Are we sure that needn't to use MCLK?

0 Leo Ma over 2 years ago in reply to Shadow He

TI__Intellectual 1956 points

Thanks for your reply.

In the customer's design, TAS5731M is used as a slave device. In this case, can BCLK be used as the clock source?

0 Shadow He over 2 years ago in reply to Leo Ma

TI__Mastermind 41720 points

Hi Leo

The datasheet sates there's internal clock, could be used during MCLK missing. But sadly there's too little information about it, and I can't be sure if all the function could be supported on this internal clock.

So I strongly suggested give a suitable MCLK for your using, choosing according to below table.

0 Leo Ma over 2 years ago in reply to Shadow He

TI__Intellectual 1956 points

Thank you!

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TAS5731M: How the MCLK pin is connected when not used