AM625: RGMII internal transmit delay selection

Koichiro Tashiro

Mastermind 22070 points

Part Number: AM625

Hi,

In TRM version A (SPRUIV7A), there is ENET1_CTRL_RGMII_ID_MODE_PROXY bit in below register to select RGMII internal delay.

But the bit is disappears in TRM version B. Is this just a typo or the feature itself is removed?

Thanks and regards,
Koichiro Tashiro

over 1 year ago

0 Kallikuppa Sreenivasa over 1 year ago

TI__Guru**** 157479 points

Hello Koichiro Tashiro

Thank you for the query.

The provision to program the ID has been disable.

The RGMII ID is always enabled and is not timed, tested, or characterized.

Regards,

Sreenivasa

0 Koichiro Tashiro over 1 year ago in reply to Kallikuppa Sreenivasa

TI__Mastermind 22070 points

Hi Sreenivasa,

I understood the internal delay is not programmable.
But what do you mean it is always enabled, but not timed, tested, or characterized?
Customers need to use ID, but the delay value is unknown?

Thanks and regards,
Koichiro Tashiro

+1 Kallikuppa Sreenivasa over 1 year ago in reply to Koichiro Tashiro

TI__Guru**** 157479 points

Hello Koichiro Tashiro

Thank you

Koichiro Tashiro said:
But what do you mean it is always enabled

There is an internal delay always enabled on the TX path.

Koichiro Tashiro said:
Customers need to use ID, but the delay value is unknown?

There is no exact delay value. The min delay is provided in the data sheet.

Regards,

Sreenivasa

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AM625: RGMII internal transmit delay selection