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DP83867IR: Power up time

K.Hamamoto
Guru 12155 points
Part Number: DP83867IR

Hi Team,

I would like to know about the power up timing as it shown at Fig1.

T1 is typicaly 200ms.(see 7.6 Power up timing)

Is the 200ms is included with the high period of RESET_N ? It means should we set RESET to high more than 200ms before the first clock of MDC?

Or should we set RESET to high more than 195us as it's shown as T1 at Fig 2 Reset timing?

Best Regards,

Koji Hamamoto

  • 0
    TI__Mastermind 23675 points

    Hi Koji-san,

    Power-up applies to only the power-up of the PHY.

    RESET timing is only applicable when the PHY has a stable supply and the POR is long done but then you do a RESET at some time in normal operation.

    RESET timing diagram does not apply when doing power-up.