TskewT for transmitting of RX signals

kenshow

Part Number: DP83867IR

Hi,

I want to know that the specification of RX timing at the Shift mode. Because, I need to adjust RGMII RX transmit timing with TskewT in PHY device.

My questions are:

1) Data sheet is described that TskewT is +- 500ps. Is this the value in align mode "RGMII_TX_CLK_DELAY = 0"?

2) When I select shift mode "RGMII_TX_CLK_DELAY = 1" and "RGMII_TX_DELAY_CTRL=0111b" , Is the timing spec that TskewT is type 2ns and MIN/MAX +-500ps?

Regards,
Kenshow

over 6 years ago

0 Geet Modi over 6 years ago

TI__Mastermind 26320 points

HI Kenshow-san,

Yes , these specs assume no delay. Variation shall be with-in these specs for delay mode as well.

Regards,

Geet

0 kenshow over 6 years ago in reply to Geet Modi

Genius 3725 points

Hi Geet,

I understood the specification about TskewT as follows:

Aligned mode of type is no delay (0ns) between RX_CLK and RX_D/CTL. And, Shift mode can set RX_CLK delay as 0.25 to 4ns from RX_D/CTL. These MIN/MAX values are +- 500ps from set delay value.

Is my understanding OK?

Regards,
Kenshow

0 Geet Modi over 6 years ago in reply to kenshow

TI__Mastermind 26320 points

Hi Kenshow,

That's correct.

Regards,

Geet

0 kenshow over 6 years ago in reply to Geet Modi

Genius 3725 points

Hi Geet,

Thank you.

Regards,
Kenshhow

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TskewT for transmitting of RX signals