TAS5720A-Q1: Clock error

Linda Brunelli

Part Number: TAS5720A-Q1

Hello,

I am working with TAS5720A-Q1. At the power up, I set the following registers :

REG ADDRESS	DATA
0x02	0x04
0x01	0xFD
0x06	0xD1

The others are kept as default.

The master and I2S clocks are set as follows:

- MCLK: 6.14MHz (yellow trace)

- SCLK: 3.07MHz (blu trace)

- LRCK: 48kHz (pink trace)

I can communicate with the amplifier (so, no I2C issues), but I always get the clock error (CLKE) when reading the status register (register 0x08 gets data 0x08).

I get the same error even though the MCLK is 12.28MHz instead of 6.14MHz.

Could you suggest why this happens?

over 1 year ago

0 Gregg Scott over 1 year ago

TI__Mastermind 45085 points

Hi,

You should also put a scope probe on the /SPKR_FAULT pin. This will give us more information to help you.

Regards,
Gregg Scott

0 Linda Brunelli over 1 year ago in reply to Gregg Scott

Prodigy 20 points

Hello, the SPK_FAULT pin is high.

0 Shadow He over 1 year ago in reply to Linda Brunelli

TI__Guru 50470 points

Hi Linda

When Clock Fault happens, the SPK_FAULT pin should be low. Are you connect SPK_SD and SPK_FAULT pin together?

Maybe share us your schematic here, we could check.

And for register values, do you see any other fault been reported?

0 Linda Brunelli over 1 year ago in reply to Shadow He

Prodigy 20 points

Hi, SPK_SD and SPK_FAULT are not connected together. SPK_FAULT is constantly high, while SPK_SD is low.

When reading the Fault configuration and error status register (reg adress 0x08) I get 0x08 as data, so only bit 3 is set to 1. I guess this should mean only clock error.

Are there any other register I can check to get other possible errors?

+1 Shadow He over 1 year ago in reply to Linda Brunelli

TI__Guru 50470 points

Hi Linda

The SPK_SD should be controlled by your system. And if you pull low this pin, the device's internal circuit is shutdown, may not able to give you correct info.

Let's check this point first. See this SPK_SD connect to which place in your system?

0 Linda Brunelli over 1 year ago in reply to Shadow He

Prodigy 20 points

Hi,

I have put the SPK_SD high and now the amplifier works correctly.

Thank you!

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TAS5720A-Q1: Clock error