9
votes
Accepted
Can I use Cat 6A to create a USB B 3.0 Superspeed?
In a simple word no, you are expecting too much and need an active USB extension cable without spending any more thought on custom solutions for extending 5 Gbps USB3 and USB2 for 10 meters.
...
- 165k
8
votes
What is "boosted electrical level" in a USB?
The link in the table to "Register F6h" gives some idea:
There are four settings, normal, +4%, +8% and +12% of the nominal drive strength.
This is not a USB standard compliant feature as ...
- 68.8k
5
votes
Accepted
What difference does the USB-C connector make what orientation the cable connected to it is now?
It is necessary in some cases and in some cases it isn't.
The plugs and receptacles are symmetrical, but the signals on the connector are not and must be swapped to route correct signals to correct ...
- 165k
4
votes
Is it possible to convert a USB Legacy charger to support USB-C Power delivery with an active adapter in between
This is of course possible, but you'll end up with a device that costs as much as a dedicated USB 3 charger if it sells in the same volume. Since it will sell way less, it won't benefit from the ...
- 14.5k
3
votes
What exactly makes the SET_ADDRESS command fail in my situation?
why is my device able to maintain USB communication with my computer
as shown above?
The communication shown above is not with your device, it is between the system driver and runtime registers of ...
- 41.9k
2
votes
Accepted
Provide 5V and 5A through USB-C
I need to power a Raspberry Pi 4 using an ATX power supply.
I think the problem is blown out of proportion. If you have to use ATX power supply, it is your proprietary solution. Unfortunately, you ...
- 41.9k
2
votes
Accepted
What is "boosted electrical level" in a USB?
The "boosted electrical level" feature is called by MCHP/SMSC marketing as "PHYboost". It was invented to compensate for loss of signal levels due to extra components that a OEM ...
- 41.9k
2
votes
Accepted
When wiring up a usb port without a hub, how do you wire up a current limit switch?
I assume you mean Raspberry Pi Compute Module 4. Per CM4 datasheet, this board does not have any dedicated (pre-programmed) pins to control the Hi-side power switch, nor any input to sense the port ...
- 41.9k
1
vote
Is it possible to convert a USB Legacy charger to support USB-C Power delivery with an active adapter in between
Sure it is possible, but the question is really why it should be done even if possible.
Not all adapters can give you 2.4A. There is no standard (except proprietary standards which are proprietary ...
- 165k
1
vote
Can I use Cat 6A to create a USB B 3.0 Superspeed?
For starters, Cat 5/6 is 100 Ω characteristic impedance and USB is 90 Ω so you need to use active or passive means to bridge between them. At USB 3 speeds, this needs to be active. You’re not out 60 € ...
- 16k
1
vote
USB breakout board for turning off device - SHIELD help needed
Yes you should. To the devices, it must look like there is a single cable in between with two connectors. Taking the cable as an example, you cannot take a cable and cut the shield in the middle and ...
- 165k
1
vote
USB self-powered mode
In a self-powered device, all the current needed for operation of the self powered device is drawn from its own power supply. The USB VBUS line (always 5V) connection from the host to the self-powered ...
- 4,227
1
vote
How to boost USB power delivery
You've done a nice job collecting clues. I suspect the root of this problem is that the wall power supply into the RPi is "not as good as you think it is", rather than the RPi's internal ...
- 801
1
vote
Is AC power in India unstable?
Many chargers (such as AC to USB or laptop power supplies) don’t use an earth connection at all, especially those designed to be used in places where 2-pin AC outlets are common. Many US plugs, for ...
- 7,525
1
vote
USB-C Alternate Mode - ensure no activity on TX / RX pins during enumeration?
The usual solution is to keep the pins disconnected or undriven until the usage for the pins is known.
If you use them for sensititive analog inputs/outputs then both devices must have analog muxes ...
- 165k
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