New answers tagged usb-device
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
8
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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
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 ...
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2
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Why is a USB memory stick getting hotter when connected to USB-3 (compared to USB-2)?
I've got the exact same USB stick here and can confirm that it does get pretty warm even while "idling" at USB3; warmer than other USB 3 sticks I use.
Customer reviews found on various ...
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9
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Why is a USB memory stick getting hotter when connected to USB-3 (compared to USB-2)?
USB3 allows for more speeds and power. A device that gets connected via USB3 link can assume and negotiate more current to work faster, like in this case, actually read and write data as fast it can ...
- 164k
31
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Accepted
Why is a USB memory stick getting hotter when connected to USB-3 (compared to USB-2)?
USB3 interface contains two nearly-independent busses and has to have two controllers in one chip. One part operates as USB3, and another operates as USB2. The signals run over separate set of wires. ...
- 41.9k
1
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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 ...
- 164k
9
votes
Power line crossing data lines via the ground plane
If you need to do this in two layers, you can reduce the impact of the gap by routing a ground line on the top layer.
Ideally you will route it from the source of the signals to the destination (...
- 9,021
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