TAS5733L: May I floating MCLK, SDA & SCL when those pins unused.

NObody

Expert 1100 points

Part Number: TAS5733L

Hi, All：

As title, I want to check how to connect MCLK, SDA & SCL pin when I don't use them.

May I floating those pins??

over 7 years ago

0 Shawn Zheng over 7 years ago

TI__Mastermind 24835 points

Hi John,
I can't quite understand this question. MCLK and I2C configuration are necessary for the device normally working. Please refer to our TAS5733L EVM design: www.ti.com/.../slou439.pdf
Best regards,
Shawn Zheng

0 NObody over 7 years ago in reply to Shawn Zheng

Expert 1100 points

Hi, Shawn
Let me put this another way, TAS5733L can't normally working without I2C & MCLK, right??

0 Shawn Zheng over 7 years ago in reply to NObody

TI__Mastermind 24835 points

Hi John,
You are right.

Best regards,
Shawn Zheng

0 NObody over 7 years ago in reply to Shawn Zheng

Expert 1100 points

Hi, Shawn：

As the picture form datasheet, customer think MCLK isn't required.

If this is true, any condition needed?

0 Shawn Zheng over 7 years ago in reply to NObody

TI__Mastermind 24835 points

Hi John,
For 3-wire I2S mode, SCLK input can be also used for MCLK for some cases. For most TASS57xx devices, 44.1/48-kHz mode allows the use of a 64*Fs MCLK rate. This rate also happens to be one of the supported SCLK rates. In system's where only one clock may be available, a common MCLK=SCLK=64*Fs rate is an option to overcome the limitation. -- This is valid only if the Fs rate is 44.1/48-kHz. Please find more explanation in this post in wiki: e2e.ti.com/.../2425.i2s-clock-requirements-on-tas570x1x2x3x-device-s
Best regards,
Shawn Zheng

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TAS5733L: May I floating MCLK, SDA & SCL when those pins unused.