DP83825I: About setup time

Ryu Yamashita

Part Number: DP83825I

Tool/software:

Hi team,

The following description has disappeared due to revision of the datasheet.
(2) RMII Slave Output Timing default supports setup time upto 7.5 ns. For 7.5ns to 10.5ns, program register 0x0017.8 = 1, 0x0042=0x0014
Does this mean that there are no more restrictions other than that the setup time is 4ns minimum?

Best Regards,
Ryu.

2 months ago

0 Gerome Cacho 2 months ago

TI__Mastermind 39855 points

Hi Ryu,

I am looking into this with my team. I believe the footnote disappeared due to the specific tie to the specification, but would believe it is still applicable.

Sincerely,

Gerome

+1 Gerome Cacho 2 months ago in reply to Gerome Cacho

TI__Mastermind 39855 points

Hello,

This is confirmed to be a typo. We will look to add it back in upon next revision cycle of datasheet.

For no register configuration, setup time shall be between 4-7.5ns. If setup time is 7.5-10ns, register configuration is needed.

Sincerely,
Gerome

0 Ryu Yamashita 2 months ago in reply to Gerome Cacho

Genius 3725 points

Hi Gerome,

Thanks for the reply.
So you are saying that the range other than 4~10.5ns is still the same and cannot be handled.

Best Regards,
Ryu.

+1 Gerome Cacho 2 months ago in reply to Ryu Yamashita

TI__Mastermind 39855 points

Hello Ryu,

The behavior is identical to initial revision of datasheet.

Sincerely,

Gerome

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DP83825I: About setup time