iMX6 input RGMII clocks in the MCIMX6SX SDB

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iMX6 input RGMII clocks in the MCIMX6SX SDB

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vadimaleynikov
Contributor III

Hello.

Answers in many threads explicitly state that the ENET_REF_CLK iMX6 input must be driven by a 125MHz external source. But MCIMX6SX SDB schematics show C346 and R134 as "DNP", so the ENET1_TX_CLK (#A7) pin isn't connected.

1. Are the MCIMX6SX SDB schematics correct? Are C346 and R134 are populated? Or the  ENET1_TX_CLK  pin is connected to a 125MHz source in another way.

2. If every used RGMII use its own (separate) ENET_REF_CLK input or they can share one iMX6 input?

Best regards,

Vadim Aleynikov

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Vadim

1. this was valid for i.MX6DQ/SDL, while i.MX6SX uses upgraded ENET design.

    i.MX6SX SDB schematic is correct,

2. use own input

Best regards

igor

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vadimaleynikov
Contributor III

Hi Igor.

Thank you very much for your reply. But it isn't quite clear to me what

the source(s) for the iMX6 ENET_REF_CLK inputs are on the MCIMX6SX SDB

and how exactly they are connected. Could you clarify?

Best regards,

Vadim

2016-07-11 3:52, igorpadykov пишет:

>

  NXP Community

  <https://community.freescale.com/resources/statics/1000/35400-NXP-Community-Email-banner-600x75.jpg>

>

    iMX6 input RGMII clocks in the MCIMX6SX SDB

reply from igorpadykov

<https://community.nxp.com/people/igorpadykov?et=watches.email.thread>

in /i.MX Community/ - View the full discussion

<https://community.nxp.com/message/810391?et=watches.email.thread#comment-810391>

>

Hi Igor.

Unfortunately your message from 2016-07-11 3:52 contained no data. Could you answer my questions?

Best regards,

Vadim

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vadimaleynikov
Contributor III

Hi Igor.

Unfortunately your last message contained no data:

2016-07-11 3:52, igorpadykov пишет:

>

  NXP Community

  <https://community.freescale.com/resources/statics/1000/35400-NXP-Community-Email-banner-600x75.jpg>

>

    iMX6 input RGMII clocks in the MCIMX6SX SDB

reply from igorpadykov

<https://community.nxp.com/people/igorpadykov?et=watches.email.thread>

in /i.MX Community/ - View the full discussion

<https://community.nxp.com/message/810391?et=watches.email.thread#comment-810391>

Could you answer my questions?

Best regards,

Vadim

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