TPS659037: CLK32KGO output

Tom Newman

Part Number: TPS659037
Other Parts Discussed in Thread: AM5728

I have a TPS659037 powering an AM5728 but am not seeing any output on the CLK32KGO ball (I am expecting to see a 32K digital clock).

Does this functionality need to be enabled or should it just work?

Thanks

over 8 years ago

0 Gordon Varney over 8 years ago

TI__Genius 9380 points

Tom,
Just to be clear, are you asking about CLK32KGO on M11, or CLK32KGO1V8 on M5?

0 Tom Newman over 8 years ago in reply to Gordon Varney

Intellectual 380 points

CLK32KGO on M11

Thanks

0 Karl Wallinger over 8 years ago

TI__Genius 16410 points

Hello Tom,

The CLK32KGO pin is only controlled by OTP, not by I2C. Please see the TPS659037 User's Guide for detailed description of each OTP sequence. For TPS6590376 and TPS6590377, CLK32KGO is not enabled by default.

If you want to use an I2C-controllable clock, you can use CLK32KGO_1V8 (multiplexed with GPIO_5).

Regards,
Karl

0 Tom Newman over 8 years ago in reply to Karl Wallinger

Intellectual 380 points

Hi Karl

Can you confirm where this is detailed within any of the TPS65903X documentation?

There is no mention of this being disabled within the document you linked to.

The user guide for the TPS659037 reads as though this pin will always provide a 32K output and as such this is how our board has been designed.

Is there any way of us enabling this on our prototype boards?

Thanks

Tom

0 Karl Wallinger over 8 years ago in reply to Tom Newman

TI__Genius 16410 points

Hi Tom,

We're working on updating our documentation to make this more clear. Please send me an e-mail directly using the e-mail in my profile, and we can discuss this offline.

Thanks,
Karl

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TPS659037: CLK32KGO output