Questions tagged [network-interface]
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78 questions
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custom W5500 + RJ45 (HR911105A) – Link/ACT LEDs not lighting up, even though SPI works
I'm using an ESP32-S3 with MicroPython and a custom W5500 Ethernet module connected via SPI. I can successfully communicate with the W5500 — reading the version register returns 0x04, so SPI works ...
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Wiznet W5500 RSVD pins
I am implementing the W5500 chip in my PCB project and have encountered a question. There are 6 RSVD (reserved) pins on it - 23, 38, 39, 49, 41, 42. In the reference schematic on their website, I see ...
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What's the difference between long and short (physical shape) type of RJ45 connector of the same specifications?
I have two RJ45 PNs (with builtin magnetics) of different lengths but with same specifications.
I have compared both datasheets but was not able to find any specific difference except the length.
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How does an ethernet controller work? [closed]
How does ethernet controller or a network interface card work?
I'm a software engineer so have little background on electronics. I've seen some videos from Ben Eater to understand some basics. How ...
- 135
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Connecting two W5500 via UDP results in PHY link off
I want to connect two STM32F4 and to communicate via UDP. At the moment I only want to send data from one to another mcu. I have tested tx and rx communication separately with PC - python scripts and ...
- 109
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Physical interface for ADSL Annex J
My mom’s ADSL line got upgraded from Annex B (bundled with ISDN) to Annex J (pure ADSL) a few months ago.
While doing maintenance at her house, I noticed that of the two wires coming into the house ...
- 196
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257
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Can M-LVDS be used as bus protocol?
https://www.analog.com/media/en/technical-documentation/application-notes/AN-1177.pdf
In the document, it states that CAN is robust but M-LVDS is low power alternative of that. However, I couldn't be ...
- 457
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SFP, understanding control pins
I have an FS SFP (SFP-GB-GE-T 1000BASE-T SFP 100m).
My device has some I/O pins such as TX_DISABLE, RATE_SELECT_1 and RATE_SELECT_0, etc. I am having a hard time finding documentation on these ...
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How Nic process packets
As packet arrives Nic detect it on its interface like wire/air and than packet is kept in Rx FIFO the on chip memory for further processing like offloading and determining it belong to it after ...
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RL-TCPnet crash when send and get at the same time
I'm working on a web service with RL-ARM libraries. I want to send some parameters with AJAX as .cgx file and at the same time I want to create a socket and then send a lot of data to the destination.
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Interfacing RJ45 to 3 pin RMII and bidirectionality
I am trying to add an Ethernet interface to a dev board (This board specifically).
From looking at the schematics, I see that it has a 3 pin PHY input (GND, TRX+, and TRX-). From my understanding, a ...
- 111
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What to do with unused pins on a 1000BaseT RJMAG jack
Trying to figure out what to do with the unused wires heading into the magnetics on an RJMG2330A1610ER Ethernet/USB jack. Due to the craziness in manufacturing in the world I am forced to find a ...
- 81
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510
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QSFP-DD to 8x 10G SFP+
I am trying to use a QSFP-DD port on an FPGA to breakout and interface with 4 or 8 SFP+ ports. I am curious if this is possible. From my research online, it seems like this all depends on the module ...
- 111
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What connector is this? (Inside a wifi modem)
I was about to attach an antenna to my 4g modem and thus trying to identify which connector is there on my modem board and i found this connector (4 of them, 2 for 4g and 2 for wifi).
I tried ...
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W5500 network configuration issues
I have used W5500 hardware for my gateway device. It has been implemented in 80-100 locations. But in 4-5 locations I'm getting an unusual issue related to the network connection.
The ethernet mode is ...
