DP83822I: Disabling loopback at 10Mbps half-duplex

Takeshi Sasaki

Part Number: DP83822I

Hi team,

Could you give me comments on the following question?

For the default setting at 0x0000(BMCR), bit[14] = 0 as normal operation, does it mean the device will never run loopback operation during 10Mbps and half-duplex mode. Is it correct understanding? The customer wants to confirm if normal operation will not operate as loopback at 10Mbps and half-duplex mode.

Best regards,

Takeshi Sasaki

over 6 years ago

0 Aniruddha Khadye over 6 years ago

TI__Mastermind 18425 points

Hi Sasaki-san,

What is the purpose of this test? MII loopback mode is intended to serve as diagnostic tool to check the connection between MAC and PHY. The MAC side will be isolated from the cable side. In this mode the duplex nature of the PHY is ignored and data is looped back to the MAC.

-Regards

Aniruddha

0 Takeshi Sasaki over 6 years ago in reply to Aniruddha Khadye

TI__Expert 4480 points

Hi Aniruddha,

Thank you for your comments. I see. So the loobback will never happen in normal operation, since it's diagnostic mode. Thank you for your support.

Best regards,

Takeshi Sasaki

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DP83822I: Disabling loopback at 10Mbps half-duplex