DP83867E: Strap setting terminal for Fast Link Detect

TOSHIKAZU HORI

Part Number: DP83867E

Thank you for your help.

I would like to enable the "Fast Link Detect" function of the DP83867E, but I couldn't find any instructions on how to set up the corresponding strap terminal, probably because I read the datasheet poorly.
The datasheets you are looking at are Rev.C and Rev.D.
It would be helpful if you could tell me how to set up the strap terminal.

Thank you.

over 1 year ago

0 Gerome Cacho over 1 year ago

TI__Mastermind 40225 points

Hello,

There is no strap configuration for Fast Link Detect. Please enable this via registers.

Sincerely,

Gerome

0 TOSHIKAZU HORI over 1 year ago in reply to Gerome Cacho

Prodigy 170 points

Hello Gerome,

Thank you for answering.

Sorry, it wasn't "Fast Link Detect", it was "Fast Link Drop".

Thank you.
We apologize for the inconvenience.

Best Regards,

0 Gerome Cacho over 1 year ago in reply to TOSHIKAZU HORI

TI__Mastermind 40225 points

Hello,

For Fast Link Drop, this is also not available via strapping; only register configuration.

Sincerely,

Gerome

0 TOSHIKAZU HORI over 1 year ago in reply to Gerome Cacho

Prodigy 170 points

Hello Gerome,

Thank you for answering.

Sorry for the repeated question.

I think that the enable strap for "Fast Link Drop" is written so that it can be read by Bit 10 of the STRAP_STS2 register: STRAP_FLD (Fast Link Drop (FLD) Enable Strap).
What is reflected in STARP_FLD of STRAP_STS2 register?

It would be helpful if you could give me one more point here.
Bit 14 of the FLD_CFG register: FLD_EN (1000BASE-T Fast Link Drop). Isn't the same operation necessary in 100BASE-TX mode?

Thank you.

0 Gerome Cacho over 1 year ago in reply to TOSHIKAZU HORI

TI__Mastermind 40225 points

Hello,

This is copy/paste issue. This feature is only strappable on DP83867's PAP package; not RGZ, which is the E version of the device. Else, you will need to access via registers.

Sincerely,

Gerome

0 TOSHIKAZU HORI over 1 year ago in reply to Gerome Cacho

Prodigy 170 points

Hello Gerome,

Is that what you mean...

So, in the end, in the case of the DP83867E, how should I enable the FLD function through register settings?

Does this mean setting "1=Enable FLD" in Bit 14 of the FLD_CFG register: FLD_EN (1000BASE-T Fast Link Drop) to enable it?
Also, in the case of 100BASE-TX, how should I enable it?

Sorry, I don't quite understand how to use it right now, so please help me.
Thank you.

Best Regards,

0 Gerome Cacho over 1 year ago in reply to TOSHIKAZU HORI

TI__Mastermind 40225 points

Hello,

Please set [14] irrespective of speed to enable. Once enabled, please configure FLD to the appropriate mechanism desired in [4:0]. If there are any functional concerns, please let me know after this has been tested.

Sincerely,

Gerome

+1 TOSHIKAZU HORI over 1 year ago in reply to Gerome Cacho

Prodigy 170 points

Hello Gerome,

Thank you for answering.
We understand.
It seems that when the datasheet was updated from Rev.C to Rev.D, the chapter explaining the FLD itself was also missing...
I would like to wait for the Rev.E datasheet.

Thank you.

Best Regards,

Interface

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DP83867E: Strap setting terminal for Fast Link Detect