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DP83848Q-Q1: Multiplex configuration question

Part Number: DP83848Q-Q1
Other Parts Discussed in Thread: DP83TC811S-Q1,

Hi team,

 

Our customer would like to implement both BroadR-Rech and 100BASE-T1 PHY on the same board. They operation is asynchronous and controlled by software. They are considering DP83TC811S-Q1 for BoardR-Reach and DP83848Q-Q1 for 100BASE-T1. Their concern is the signal routing from the MAC controller to these two devices (They plan to use only 01 MAC controller port). There are few approaches being considered as following: 

  • Use EN pins on the devices.
  • 2-to-1 multiplexer
  • Tristate buffers

 Could you please help to comment? 

 

Thank you

Hung