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It's 2018 and USB Type-C Is Still a Mess (androidauthority.com)
An anonymous reader shares a column: USB Type-C was billed as the solution for all our future cable needs, unifying power and data delivery with display and audio connectivity, and ushering in an age of the one-size-fits-all cable. Unfortunately for those already invested in the USB Type-C ecosystem, which is anyone who has bought a flagship phone in the past couple of years, the standard has probably failed to live up to the promises. Even the seemingly most basic function of USB Type-C -- powering devices -- has become a mess of compatibility issues, conflicting proprietary standards, and a general lack of consumer information to guide purchasing decisions. The problem is that the features supported by different devices aren't clear, yet the defining principle of the USB Type-C standard makes consumers think everything should just work.
The charging example clearly demonstrates a very common frustration with the standard as it currently stands. Moving phones between different chargers, even of the same current and voltage ratings, often won't produce the same charging speeds. Furthermore, picking a third party USB Type-C cable to replace the typically too short included cable can result in losing fast charging capabilities.
The charging example clearly demonstrates a very common frustration with the standard as it currently stands. Moving phones between different chargers, even of the same current and voltage ratings, often won't produce the same charging speeds. Furthermore, picking a third party USB Type-C cable to replace the typically too short included cable can result in losing fast charging capabilities.
When you plug a cheap offbrand charging cable into your device, the USB-C standard signals this by emitting a blue flash and burning your device to a crisp. This feature has proven less popular with users than was at first envisioned.
Just last week I plugged a model 3 Tesla into a supercharger. It soaked up electrons at the rate of 120 kW. 300 Amp at 480 v or something insane. And while Tessie is drinking 11 kW in the garage 48 Amp at 240 v, to store enough energy to run the whole house for three days, the cell phone struggles to store 2300 mAh in one hour, enough to run one dinky little phone for 18 hours.....
What a mess...
sed -e 's/Chuck Norris/Rajnikant/g' joke > fact
Crossover is (mostly) fixed by automatic MDI/MDI-X detection in GbE. Has been a while since I ran into that problem. I do fully agree though. The problem is that the USB-C spec tries to do _everything_, and that cannot work. It is also a stellar example of a really bad design done by smart, but inexperienced engineers. Or by engineers that ignored their experience because they were part of a committee. Kiss rules all engineering that needs to survive in practice. There is no KISS at all in USB-C.
Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
The standard was set by the same morons who brought you "USB high speed" vs "USB full speed". To this day, I still don't know off the top of my head which one is USB 1.1 and which USB 2.0. I always have to google it.
In addition to all the madness with charging, they also screwed up the USB 3.x nomenclature. We had a golden opportunity here to leave USB 3.0 referring to USB-A ports (add an extra revision for higher speeds), and have USB 3.1 ref to USB-C ports. That way if you saw USB 3.0 in the specs, you'd know it was a type A port. If you saw USB 3.1 in the specs, you'd know it was a type -C.
Instead they decided to rename USB 3.0 as USB 3.1. So if you see just "USB 3.1" it's referring to a older USB-A style port. If you see "USB 3.1 type C" it's referring to a USB-C port. Unless of course the manufacturer decides to omit "type C" and just call it USB 3.1 in the specs which it's actually a USB-C port. I've had to resort to looking up laptop reviews and viewing pictures of the ports on the sides to confirm exactly what ports it has and doesn't have.
It's like they intentionally trying to make it more confusing.
USB 3, like PCIe, uses multiple serial lanes for increased bandwidth. Each lane is entirely independent with its own synchronization and clock, which is what makes it still a "serial" connection by definition, not a "parallel" connection.
This comment documents you've never used USB-C in your life.
The USB-C connector is what USB should have been from the start. Yes, PD (Power delivery) is optional and you have to be a smart consumer. And it's been knowledge for years now that cheap chinese OEM's were producing non-standard compliant cables and devices that could actively harm compliant devices because the cables and chargers did not meet the spec. That's not USB's fault.
Most of those problems are behind the standard. People also forget that it takes a LONG time for new USB standards to become dominant, USB itself took a decade to become commonplace. USB mini and micro took similar time frames and we aren't anywhere near 10 years yet for USB-C.
Frankly having moved most of my devices to USB-C I love the standard. I don't have to worry about orientation when plugging it in and dealing with the quantum effect where you always have to flip over the USB connector twice to get it to plug in. Not only that but USB-C is the most durrable connector the USB committee has ever approved. And on top of that the Power delivery spec was integrated into the main spec and made standard. In addition the spec has legs in that it can be expanded for increased data transfer much easier than past standards without changing the connector.
USB-C is a god send.
I admit to not looking at these things closely. However, all of my devices now have USB-C and I find it very convenient. I haven't noticed any charging time issues, but I haven't really been paying attention. Maybe for the casual user (most of us), USB-C has worked pretty well?
Not to mention that USB 1.1, USB 2.0 and USB 3.0 are not equivalent to a specific speed. Rather, USB 1.1 specifies low speed (1.5Mbit/s) and full speed (12Mbit/s), USB 2.0 adds high speed (480Mbit/s), and USB 3.0 adds superspeed (5.0Gbit/s). But you can very well have e.g. a USB 2.0-compliant device that works only at full speed.
I'd give my right arm to be ambidextrous.
USB-C is a god send.
Well, there is the problem.
We're all athiests.
Faster! Faster! Faster would be better!
While having a poka-yoke connector is good, what made USB 1 so successful was that it was simpler and cheaper than the competitors. The Apple dock connector had 30 pins, including dedicated pins for audio, video, power, media control, serial, usb, and firewire. RS232 had 9 and had no error correction, no metadata, no power, and was slow. Firewire with a lean 6-pins allowed for bidirectional communications and was essentially a peer-to-peer network. USB had a mere 4 pins, was unidirectional, and didn't require the devices to know how to talk to each other (hence the need for a hub). It was technically inferior, but won because of price. USB2 merely improve the speed and power of USB1, so it was a no brainer to win in the market.
USB 3 abandoned the simplicity that made USB 1 and 2 successful. It took the kitchen sink model, and it is flailing the same way it's predecessors did when they took that approach.
No, it's due to the way USB 3 delivers up to 100W and cheap cable manufacturers not properly testing that.
With USB 3 the device can negotiate for high power delivery, which involves increasing the supplied voltage from 5V up to 20V. Due to physics increasing the voltage reduces the current needed to deliver 100W, which in turn reduces the amount of heat generated in the cable. Heat is wasted energy.
The problem is that the cheap cables don't implement the spec properly and are not rated for 20V/5A, so can end up supplying 20V on the wrong pins and damaging equipment. The equipment needed to properly test USB 3 power delivery costs thousands of Euro/USD, so some companies just skipped it.
const int one = 65536; (Silvermoon, Texture.cs)
SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC