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  • What does PHY refer to? - Electrical Engineering Stack Exchange
    a PHY is a type of Ethernet physical layer (eg 100BASE-TX, 10BASE-T) a PHY is an Ethernet transceiver IC (eg an IC that converts 100BASE-TX to MII RMII) a PHY is a physical layer device (more than just the transceiver IC) Is PHY ambiguous and can refer to all of these or did I understand something wrong?
  • microcontroller - Why are Ethernet MAC and PHY separate? - Electrical . . .
    The PHY also dissipates a significant amount of power all by itself And sometimes different media require different PHYs, but the MAC can be the same For all of these reasons, it makes sense to keep it as a separate chip That said, there are some chips targeted for embedded applications that include both Wiznet, for one, has products in
  • Connecting a PHY to another PHY on a same board
    Generally, if I'm connecting a PHY to RJ45 connector, I would add center tap capacitors and Bob-Smith termination like below But if I am connecting a PHY to another PHY, do I still need the Bob-Smith termination? Or can I just have center tap capacitors on both sides like below? Both PHYs share same GND but are powered by different rails
  • what is the difference between PHY and MAC chip
    what is the difference between PHY and MAC chip Ask Question Asked 12 years, 8 months ago Modified 12 years, 8 months ago
  • In USB, what is the difference between a PHY and a transceiver?
    A Phy is similar to a transceiver in that there is usually different signal standards on "both sides of the chip" With Ethernet it is MII GMII etc on one side and, well, Ethernet on the other
  • Voltage mode Ethernet PHY and Current mode Ethernet PHY
    2 In the Ethernet PHY, we have two types Voltage mode PHY and current mode PHY Can anyone tell me the reason why the center taps of magnetics are shorted in case of connection to a current mode PHY whereas, the center taps of magnetics are individually decoupled in case of voltage-mode PHY? What is the principle behind this?
  • Ethernet PHY and their corresponding hardware are represented Right to . . .
    PHY->RJ45 The magnetics also, are always shown on the left of the port, and their pin order, packaging, and the way they are drawn implies that the port is going to be on their right following the PHY->RJ45 convention
  • termination - 10 100 Ethernet PHY: What is this capacitor for . . .
    10 100 Ethernet PHYs such as ENC28J60 and DM9051 recommend the following external components on each pair What is the circled capacitor for? Any referencing or balancing that it provides would see
  • Why do Ethernet PHY magnetics have a center tap?
    I've a question with the Ethernet PHY connection to the RJ45 connector With either discrete or integrated magnetics, either with voltage mode PHY or current mode PHY, what is the purpose of the ce
  • stm32 - How to implement OTG FS hardware using embedded PHY on . . .
    The OTG FS for STM32F105 107 (which does not support OTG HS 4) has an internal PHY 5 and a pull-up resistor; thus, I attempted to use section 3 3 of AN4879 Regarding the figure that is presented below: • The OTG specification requires the use of a capacitor (maximum value 4 7 μF) on VBUS





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