Discrepancy between Pin Mux Utility and DM8148 datasheet

Diego Santa Cruz

I have found a couple of discrepancies between the Pin Mux Utility (version 02.05.02.00) and the DM814x datasheet (SPRS647D, sept. 2012).

The datasheet indicates that bit 19 of PINCTL must always be written with the reset (default) value and that bit 18 must always be set to 1.

However, the output of the Pin Mux Utility always sets bit 19 to zero and uses bit 18 as the receiver disabled which is set to zero if one chooses to disable the receiver.

Which one is the correct use of these bits in the PINCTL register?

over 13 years ago

0 Pavel Botev over 13 years ago

TI__Guru**** 170625 points

Hi Diego,

DM814x datasheet is the correct one. See DM814x SiliconErrata for more details.

http://www.ti.com/lit/er/sprz343c/sprz343c.pdf

Advisories 2.1.87 and 2.1.88

Pavel

0 Diego Santa Cruz over 13 years ago in reply to Pavel Botev

Intellectual 360 points

Thanks for the info Pavel.

Why is that the Pin Mux Utility has not been updated to reflect this situation? Or that least the documentation on the wiki?

Best,

Diego

0 Pavel Botev over 13 years ago in reply to Diego Santa Cruz

TI__Guru**** 170625 points

Diego,

Diego Santa Cruz said:
Why is that the Pin Mux Utility has not been updated to reflect this situation?

I will report to the Pin Mux utility owner.

Diego Santa Cruz said:
Or that least the documentation on the wiki?

Can you provide me a link to this documentation?

Pavel

0 Diego Santa Cruz over 13 years ago in reply to Pavel Botev

Intellectual 360 points

Sure,

The link in the Pin Mux release notes is http://processors.wiki.ti.com/index.php/Pin_Mux_Utility_for_ARM_MPU_Processors_v2

Best,

Diego

0 Pavel Botev over 13 years ago in reply to Diego Santa Cruz

TI__Guru**** 170625 points

Diego,

We have updated the wiki page:

http://processors.wiki.ti.com/index.php/Pin_Mux_Utility_for_ARM_MPU_Processors_v2#Disclaimer

Regards,
Pavel

0 Diego Santa Cruz over 13 years ago in reply to Pavel Botev

Intellectual 360 points

Hi Pavel,

The disclaimer is fine, but I think it would be better if you add a short and clear remark that on the DM814x the receiver should not be disabled, that bit 19 should always be written back with the reset value (to be taken from the datasheet) and that the source files output by the utility do not take into account these constraints, and reference the above cited erratas.

The disclaimer is just lifting responsibility off TI, but is not of much help to users without a remark like the one I suggest.

Thanks,

Diego

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Discrepancy between Pin Mux Utility and DM8148 datasheet