Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [usb-hub]

156 questions
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USB 3.0 Hub shield connection

This is about the seemingly controversial shield to ground connection. The system is basically a body-worn intel-based computer, powered by a battery. Two USB 3.0 (or 3.1 Gen1) cables come out to a PCB that contains two USB 3.0 hub chips…
apalopohapa
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How does a USB Hub work?

I know google's answer and wikipedia's answer for the above question. But I have a more specific question on hand. USB hubs have many incoming and port and just one outgoing port, I am able to use say n-number of devices together because of this.…
Aaditya Sahay
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USB hub: What's the use of the 0.1 μF capacitors in series with the RX connections?

Are the 0.1 μF capacitors in the schematic I found on the internet for the USB hub USB5537B connected to all the TXs required? What is their purpose? Normally I know that series capacitors are used to block DC signals. Is there a need to block DC…
George P.
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USB power in Parallel, increasing the maximum current using a Y splitter idea[POWER ONLY]

When you connect batteries or power sources of the same voltage, in series, the voltage adds together. When in parallel the capacity of the two add together. Ive seen a few usb>sata cables in which there are two usb cables at one end. One for…
kris2340k
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USB hub and slave on same pcb - are serial resistors and capacitors needed?

I'm building a device using TUSB2046B hub controller 4x FT230X USB to UART controller First, let's look on Hub controller sample application: Note D: All USB DP, DM signal pairs require series resistors of approximately 27 Ohm to ensure…
peku33
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Why might some video not go through a USB hub?

I'm having a strange problem with a USB Hub. I'm using a Microchip USB7206 evaluation kit. I have two camera boards. The first is a Leopard Imaging stereo camera board, which uses an OV00580 image processor to join the frames from two OV7251 MIPI…
Rocketmagnet
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Properly route through hole USB-C

I'm having major problems making a good layout with a through hole USB-C connector. Have anyone done a good layout for one? The best I have managed now looks pretty terrible and one of the differential traces has 5 vias, which is not…
Applet
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Can I use the USB 2.0 and 3.x channels simultaneously in a USB 3.x port?

I am designing an FPGA development board for myself. I want a moderately high speed link (400-500MB/s) to the host PC and I'm considering several options, including an FTDI FT-60x bridge IC. The problem is that this chip has no side channel that…
Streetwalrus
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Can I Build My Own USB Hub?

Would it be possible to make a USB Hub from scratch? Like, designing a PCB, and hand soldering components on to it? What microchip would I have to use as the controller? Is there a simple controller chip I could use for, say, a 4 port hub? I know…
skillz21
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What does the USB non-removable strap option actually change?

I am designing a device that uses a Microchip USB2412 2-port USB hub. The downstream ports of the hub are internally directly connected to other devices. Upstream is a removable USB B for power & data. The USB2412 has the option to specify that the…
Cameron Tacklind
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Do I need to switch power and ground on USB 3.0?

I am an electronics novice, so before I start cutting my cable, I want to ask people who know more than me. I have a project that has a USB 3.0 hub inside, and I want a single switch to handle the DC power and the USB connection to the computer. I…
jsureke
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Is 5.5V safe for USB storage devices?

I have a USB-A 3.0 hub with ten ports. I've owned it for about 2 years now without any issues, until recently. About a couple of months ago I had a flash drive plugged into one of the ports on the hub and noticed it seemed to die much earlier than I…
leetbacoon
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Why does my bus-power-only USB hub enumerate as self-powered?

When I plug in a Sweex NPUS0480 4-port USB 2.0 hub, it is enumerated as self powered (according to the windows USBView application). However, it is in fact bus powered. There is no DC connector on the pcb, nor any provision for one. I was just…
djvg
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How critical is PCB layout for USB Full-Speed?

I have designed a custom USB hub PCB with a TI TUSB2046(USB Full-Spped hub). Considering 12Mbps data rate, how critical are the layout constraints for the USB data lines? I did not follow the exact layout guidelines (had a short stub, slight length…
Rohit Garg
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LAN9512 USB hub and Ethernet Controller Problems

I'm working on a custom board using a Raspberry Pi computer on module (COM) (info and schematics here: http://www.raspberrypi.org/raspberry-pi-compute-module-new-product/. The board is based on the raspberry Pi model B (schematic here:…
IgorEE
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