ethernet - What does "PHY" refer to? - Electrical Engineering Stack ...
2021年10月20日 · 2. I have seen the abbreviation PHY beeing used for a handful of different things within the context of Ethernet: 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)
microcontroller - Why are Ethernet MAC and PHY separate?
2022年12月16日 · 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.
Connecting two Ethernet PHY without magnetics?
Etherent uses various types of line codes to ensure that the transmitted data is DC balanced. 4b/5b is the line code used in 100 Mbit ethernet, and then it is transmitted with MLT-3 encoding. The 4b/5b code caps the number of ones and zeros you can get in a row. Then MLT-3 transmits three different voltage levels, -1, 0, and +1.
ethernet - is MDIO required for PHY? - Electrical Engineering Stack ...
2018年3月11日 · The PHY will autonegotiate with the other side. By definition, "strapping option" is a configuration that is set in hardware by pulling up, down, or no pull on certain pins, which usually takes an effect only at release of hardware reset. This is done to save the number of package pins, which saves on costs. Therefore, there is usually no need ...
what is the difference between PHY and MAC chip
2013年7月11日 · PHY is Physical layer transceiver which connects to the copper interface of the Ethernet like BCM5461 and MAC is Media Access Control which will control the transfer of data from PHY, mostly MAC cores are inbuilt in Processors or Controllers as SoC.
phy - Connection of center tap for Ethernet transformer - Electrical ...
2010年9月1日 · 12. I'm trying to connect an RJ-45 jack with integrated magnetics (Belfuse L829-1X1T-91 datasheet) to an Ethernet PHY chip (Micrel KSZ8041TL datasheet). The TX+/-, RX+/-, and the LED pins are all easy enough to figure out, but I'm not sure what to do with the center taps (TCT and RCT) for the transformers. Should they be connected to 3.3 V power?
Ethernet PHY Output Driver stage - Electrical Engineering Stack …
2016年11月9日 · Below is my guess of what a simplified driver can look like. When [A1,A2] = 1,1, the output level is positive. When [A1,A2] = 0,0, the output level is negative. When [A1,A2] = 0,1 or 1,0, the output level is zero. The output impedance is determined by the resistors, which are matched to the cable.
show controllers ethernet-controller phy output explained
2024年1月19日 · show controllers ethernet-controller phy output explained. Odysseu$. Level 1. Options. 01-19-2024 02:02 PM. I am trying to understand what each of the values represent in the show controllers ethernet-controller phy command. Below is an output of an interface.
embedded - Electrical Engineering Stack Exchange
And, indeed, there is a standard hardware connection between the MAC and the PHY (usually provided by an external chip). It is called MII (Media-Independant Interface). There is also GMII for gigabit ethernet, and there are variations of both these interfaces with reduced pin …
ethernet - PHY address for SPI interface - Electrical Engineering …
2023年2月9日 · The SPI inferace you talk with the MCU has no concept of PHY address. The "PHY address" you refer to is an MDIO bus address. MDIO is a management interface between a MAC and one or more PHYs. In the case of the W5500, the MAC and PHY are integrated in the chip. Refer to the W5500 block diagram (green lines added by me):