All Questions
23
questions
17
votes
4
answers
5k
views
Are PCIe and USB 3.0 the same interface?
I know the title may sound provocative, but I was looking for a PCI hub, and found solutions like these:
I noticed that on the PCIe side, there is actually only one adapter (which looks passive) with ...
- 828
1
vote
0
answers
38
views
Can I connect one PCIE_CLKREQ# pin from SoC to two different devices?
In my design, I'm using VL805 USB 3.0 Host Controller which takes 1 lane of PCIe and outputs 4 ports of USB3.2 Gen 1.
The platform which I'm building is based on AMD V3000 CPU.
My question is, if ...
- 1,067
6
votes
2
answers
2k
views
Serial Interfaces - Why USB and PCIe require PHY while e.g. SPI does not require?
I'm trying to understand the reason why USB and PCIe (considering a single lane) can achieve higher data rates than e.g. SPI, I2C, UART.
The reason may be the better handling of signal impairments at ...
- 61
0
votes
0
answers
64
views
Create a transmission through PCIE lines or Ethernet lines
I'm working on a data transmission design.
I would like to create a data transmission from a Raspberry Compute Module 4, but I don't know what is the better way to do that. A USB-C is required, and ...
- 400
15
votes
1
answer
2k
views
Termination of unused mini PCIE lines on a USB only device
We're designing a USB only mini PCIE card and I'm trying to work out if it is required, or at least good practice, to terminate the high speed lines that are unused on the mini PCIE card. I can't find ...
- 188
4
votes
2
answers
2k
views
6-Layer Stackup - Where to put the Power Planes?
I have a 6-Layer board (See Design) which is an extension that is connected to a motherboard through a Board to Board Connector.
The extension should provide: two USB 3.2 GEN 2 ports, two USB 2.0 ...
- 1,067
2
votes
1
answer
1k
views
VL805-Q6 USB 3.0 Host Controller - Windows Freezing Problem
I have designed a PCB that converts from PCIE to USB 3.0 using VL805 - Super Speed USB 3.0 Host Controller.
here you can find my OrCad Design.
My PCB works perfectly on Ubunto 20.10 and it has a ...
- 1,067
1
vote
0
answers
285
views
Unable to Identify VL805 device
I have designed a PCIE to USB3 converter device that is based to VIA LABS VL805 Q6 Chip.
My problem that I can't recognize the VL805 chip in Linux, using the command "lspci":
here is the ...
- 1,067
0
votes
1
answer
119
views
How to choose between PCIE and USB3 in a CPU pin?
While looking at Validation Reference Platform for 11th Gen Intel CPU (Tiger Lake UP3), I noticed that some pins for the MCP (Multi Chip Package, which is a package that includes PCH+CPU on the same ...
- 1,067
0
votes
3
answers
913
views
USB cable characteristic impedance
Does differential impedance between D+ and D- not only depends on separation between and wire gauge of D+ and D-, dielectric constant of the insulation, but also the GND wire and shielding?
I want to ...
- 349
5
votes
1
answer
2k
views
USB Camera to GPU Memory Directly
There may be several points in this question which may not make sense to a knowledgeable person, so I do thank you for your understanding in advance.
For a computer vision project I wish to process ...
- 155
2
votes
1
answer
2k
views
Are there any pci-e controllers that take like a SPI signal, or USB and then lets me hookup a pci-e x1 card to it?
I am wondering if such a thing exists, as I could really use one to hookup to a SoC I am designing a board around, as it would allow me to take like a pci-e tv controller, pci-e ethernet card, pci-e ...
user138530
8
votes
1
answer
1k
views
USB 3.1 over PCIe board edge connector
I am designing a system with a carrier board that has all of active logic on one board and most connectors on a backplane board. The interface between the two boards is a x16 PCIe board edge connector....
- 101
0
votes
1
answer
2k
views
M.2, WiFi pins and bus
I am trying to gather some info about the M.2 connector.
My end goal is to add Wifi capabilities (e.g. using an Intel Pro Wireless M.2 card) to a Computer On Module system (iMX6, raspberry pi cm3, ...
- 101
0
votes
1
answer
55
views
Chipsets that provides access to baseband bits [closed]
Are there any chipsets for high-speed wired connections like USB3.0, Ethernet or PCIe that provides access to the raw signals being transmitted and received along the wire? Kind of like how a software ...
- 143