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DP83TC811S-Q1: Switch the mode of the chip in the process of sending and receiving data

user6432393
Prodigy 30 points
Part Number: DP83TC811S-Q1
Other Parts Discussed in Thread: DP83TC811

hi teams,

1. Is the PHY chip half duplex?

2. I set the chip as the master mode, and communicate with the slave device. If I turn the slave device into the master device and send the data to the PHY chip(Chip is still master mode). Can the chip receive data? Or the chip get a signal let me to change chip into slave mode? In other words, how to realize that as long as the device sends data, the chip has to judge and make the program switch to the slave mode?

Thanks!

  • 0
    TI__Expert 7040 points

    Hello,

    The DP83TC811 is a full duplex PHY. The 100Base-T1 standard is single-pair Ethernet so by necessity the transmit and receive signals share the same differential pair. 

    To establish link, one device has to be configured as Master and one as Slave. This can be done through Auto-negotiation or forced into each mode. If you reconfigure a Slave device as Master, the Link Partner will also need to be manually reconfigured. Since the PHY is full-duplex, each side is capable of sending data in either Master or Slave modes.

    Regards,

    Justin