Questions tagged [ethernet]
Questions about the electrical implementation of Ethernet; ask another Stack Exchange for software or protocol questions. Specify the speed as 10/100BASE-T is somewhat different from 1000BASE-T, apart from the speed. Those are copper standards; Ethernet over fiber optical cable is also defined.
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Ethernet link ss only up with 10Mbps, No 100 or 1000Mbps even in forced condition
We are using Marvell 88E1512 with Xilinx ZU2CG SOC for 1000Mbps ethernet.
Currently we are facing issue with ethernet link.
Attached the schematics for your reference.
The system description is below....
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How to test speed of my 1GBps ethernet port board? [closed]
I built a board with STM32H. How to test the speed I'm getting at my 1GB ethernet port? I do not what to do static ping test I want do I'm getting 1GBPS or 900MBps speed on my port.
any ways?
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PCIe to SGMII/RGMII for Automotive Ethernet card
Currently I'm working on a 4 port Automotive Ethernet card which can be used by a computer over PCIe. Im currently searching for the best way to make the connection between the four Automotive ...
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Ethernet driver Pulse HX1188NL 1522-PP pin names
I want to get Ethernet driver pin names, but in datasheet was missed some pins. Certainly, was missed pins under numbers 4, 5, 12, 13.
Ethernet driver schematic picture: Datasheet
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EMC best practices for Eth lines
I am trying to understand and pass CISPR 32 / 35 for a unit I am making, I have the general idea mostly down but I would like clarity on the best practices for attaching my ETH isolation transformer (...
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Link drops during vibration/shock tests (crystal losing stability?)
I designed a custom board with an Intel I226 Ethernet controller.
At 2.5 Gbps the link works perfectly under normal conditions.
However, when we take the board to vibration and shock tests, the ...
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Input on MDI Ethernet trace design
I am working on a 4-layer PCB board at the moment and trying to integrate 10/100 ethernet. I just wanted some input on the differential pair routing. I have a general idea of what I'm doing and have ...
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What is the maximum inter-lane skew length for RGMII 1000 Mbit/s?
What is the maximum inter-lane skew length for RGMII 1000 Mbit/s?
I'm looking at ST Microelectronics' Hardware Guidelines AN5489 for STM32MP SoC. It says that traces should be short with 'balanced ...
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3-port Ethernet switch IC with power-off passthrough?
In the lighting industry, there are some daisy-chainable Ethernet devices (fixtures), that offer the feature of passing through the Ethernet connection even when the device is not powered on (Robe ...
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Understanding 100Base-T1 PHY: 4B3B encoding and timing
How does 4B3B encoding works without data loss?
Specifically:
How can 4-bits be mapped to 3-bits (data space 16 map to data 8)?
Is there a follow up parity 3-bit every 4th cycle?
.i.e.: $$4bits \...
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Writes from PCIe device (Realtek ethernet NIC) to DRAM memory are not visible to core
Target: I am developing a baremetal driver for the Realtek Ethernet Controller (RTL8168g, MAC version 40) which is connected through PCIe to the SoC.
SOC Reference manual: https://developer.arm.com/...
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How to Map Ethernet PHY (YT8531C-CA) MDI Pairs to SoC Ethernet Wires (TX+/TX-, RX+/RX-) When Removing RJ45 Port?
I’m working on a product design using the Orangepi’s CM5 board, which uses the RK3588s SoC. In the reference schematic, the YT8531C-CA Ethernet PHY output is connected directly to the RJ45 Ethernet ...
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How to best route VCC over "pre-magnetic" phy: via or 0R?
I am routing the KSZ8794CNX (https://www.mouser.com/datasheet/2/268/KSZ8794CNX_Data_Sheet_DS00002134-3444409.pdf) in a two layer PCB, and I might need to route its 3.3V and 1.2V through the "pre-...
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Need help understanding PoE Magnetic
This is the magnetics connection in my design. This PCB circuitry has been tested and working individually, but when I connect two or more of the same PCB hardware to an ethernet switch, the ...
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How to replace integrated Ethernet magnetics to save space
I want to replace a ethernet RJ45 with integrated magnetics and 100TX and PoE support connector due to space constraints.
I was thinking of soldering the cable, but I don't know how to replace the ...
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