Why USB 3.0 10 live? At least some of the contacts for USB 3.1?

Why cable 3.0 10 livedwhen the contacts in the plug 9?
The specification provides only USB 3.1 type-c (24пин)?
July 2nd 19 at 18:16
3 answers
July 2nd 19 at 18:18
88197bc46d89432b8eba330b4cd6982c.PNGThis is necessary for connectors B-type, and micro. USB 3.1 Type-C provides the ability to mirror connection (to avoid superposition when you connect), plus additional lines, therefore, it seems that there are more.
ee72291378704e3dad8c718b9db71ce5.PNG
Do not understand why once lived.
In USB 3.1 actually working more pins than 3.0, there's just some mirrored. - Brandi_Hoppe0 commented on July 2nd 19 at 18:21
: my manual says that this is an additional ground under a different name DRAIN GND, GND in parallel. - Mireill commented on July 2nd 19 at 18:24
: the question is why is it.
Each additional pair of their own land and they are United in the plug? Then the question arises, why are they separate in mine. - Brandi_Hoppe0 commented on July 2nd 19 at 18:27
In USB 3.1-C top half mirroring the bottom. A and B are just mirror line, are identical to each other. - Mireill commented on July 2nd 19 at 18:30
: ground for signal. Normal GND is needed to power. - Mireill commented on July 2nd 19 at 18:33
: the diagram view: https://hsto.org/files/83d/0fb/9a3/83d0fb9a385b4ab...
— mirror only some. - Brandi_Hoppe0 commented on July 2nd 19 at 18:36
: I told you, they mirror completely. Figures 1 and 2 are just to help avoid confusion when soldering contacts. And they are absolutely identical. - Mireill commented on July 2nd 19 at 18:39
That is, CC1 corresponds to CC2, TX1+ TX2 -- + and so on. - Mireill commented on July 2nd 19 at 18:42
: does not mirror that seen on the diagram.
To argue with the obvious, why you? - Brandi_Hoppe0 commented on July 2nd 19 at 18:45
think of CC1 and CC2 is used only 1 contact? - Brandi_Hoppe0 commented on July 2nd 19 at 18:48
because it's obvious. Even in articles it is mentioned. Made in order to connect the device to varying positions without error. If you don't, make a file transfer contacts. And then you know that it's true. Figures 1 and 2 are only needed when soldering the contacts with the wires. - Mireill commented on July 2nd 19 at 18:51
: what and where was said?
By your logic, it was necessary to have a GND and figures to put to supposedly avoid confusion. - Brandi_Hoppe0 commented on July 2nd 19 at 18:54
: Yes, this is the same contact to one wire. Scheme crosswise. During the COM could still be called a null-modem cable. - Mireill commented on July 2nd 19 at 18:57
: why take that it is one and the same contact? - Brandi_Hoppe0 commented on July 2nd 19 at 19:00
: because it's written in the specs... - Mireill commented on July 2nd 19 at 19:03
: where exactly? - Brandi_Hoppe0 commented on July 2nd 19 at 19:06
arstechnica.com/gadgets/2015/01/usb-3-1-and-type-c...
https://www.wikiwand.com/ru/USB_Type-C
Even look difficult for you... - Mireill commented on July 2nd 19 at 19:09
: how are you supposed to search?
In the 1st link it says that the SBU is a secondary bus, and as I understand it's about a twisted pair instead of 1 pin.
At the 2nd reference States: 4 differential pairs for transmitting high-speed signals SuperSpeed.
— as I understand it CC, SBV, RX and TX. Pair! - Brandi_Hoppe0 commented on July 2nd 19 at 19:12
: have you read the table Color "Explorer shell"? It specifies which contacts is connected to it. There is generally only two differential pairs. (Tx1+ Tx1-), (Tx2+ Tx2 -) is one differential pair on a four contact, (Rx1+ Rx1-), (Rx2+ Rx2 -), the second differential pair four contact. In the same table even clearly stated. - Mireill commented on July 2nd 19 at 19:15
: The colors of the Explorer shell? Do not understand what you mean.
In this table view column "Description" there are 4 differential pairs, and each pair of contacts. - Brandi_Hoppe0 commented on July 2nd 19 at 19:18
in General, see the table in "connector Pinout" — everything is clear, different contacts written. And they are not 12. - Brandi_Hoppe0 commented on July 2nd 19 at 19:21
I've added one more picture to make you understand that there is wire and has contacts which connect to veins. Some contacts are duplicated. In the same task for the reliability of the transmitted signal, in other tasks to avoid errors of incorrect connection of the contact. Here in USB 3 uses the second case. - Mireill commented on July 2nd 19 at 19:24
I just said — only some contacts are duplicated. And not half. - Brandi_Hoppe0 commented on July 2nd 19 at 19:27
: where did you get half? There are all duplicated from one side to the other. He wrote the same, mirrored. - Mireill commented on July 2nd 19 at 19:30
no. The number of contacts counted at least. - Brandi_Hoppe0 commented on July 2nd 19 at 19:33
: and better see the "name" column and count how many wires necessary for this. 12. - Brandi_Hoppe0 commented on July 2nd 19 at 19:36
in the table the author from Wikipedia forgot to add a couple of contacts B6 and B7, not specifying that they correspond to the A6 and A7, so the table is not got. Calculated everything correctly. For example, common ground is from 4 pins, which is confirmed on the connector (there are four). The food, too. The differential line signals described separately. Because they are different by description. For example: "Shielded differential pair #1, negative", and "Shielded differential pair #1, positive" - is one differential pair (Tx+ / Tx-) or (Rx+ / Rx-). Here I am a little disappointed in the number of differential pairs. Here are four of them, not two as in USB 3.0:
1) Tx1+, Tx1-
2) Rx1+, Rx1-
3) Tx2+, Tx2-
4) Rx2+, Rx2-
And I don't see any errors in the description. - Mireill commented on July 2nd 19 at 19:39
: the point is that each differential pair are allocated 2 contact. — It is 8. Still have USB 2.0 (4), and more land — a total of 12 and more, i.e. not all mirrored. - Brandi_Hoppe0 commented on July 2nd 19 at 19:42
: and? You seriously expect that USB 3.1 will use only 10 lived? USB 3.1 uses 16 lines. If you added another pair of differential pairs, respectively more lines. A mirror is understood when Rx1+/Rx1 - can become Rx2+/Rx2 -, and back. For Tx1+/Tx1 -, and Tx2+/Tx2 - the same thing. This allows a person to connect one side, then the other. This is the mirror. D+/D - only duplicated on the other side. And the rest are of the same type, and are connected to a line corresponding to her type. - Mireill commented on July 2nd 19 at 19:45
: I guess I just don't know what is the minimum. Probably 16. - Brandi_Hoppe0 commented on July 2nd 19 at 19:48
: minimum 15 lines + braid. 16 or 17 may be optional. Itself documentation (found via search): ww1.microchip.com/downloads/en/AppNotes/00001953A.pdf - Mireill commented on July 2nd 19 at 19:51
: hardly I will understand it, especially the English. - Brandi_Hoppe0 commented on July 2nd 19 at 19:54
: want and the Chinese will understand. I myself don't have any. I only know the terms. And nothing alive. - Mireill commented on July 2nd 19 at 19:57
July 2nd 19 at 18:20
Most likely, both of these conductors is connected to ground
thanks, but to assume it, think it can) - Brandi_Hoppe0 commented on July 2nd 19 at 18:23
July 2nd 19 at 18:22
on smell this contact is curled
the question "why", not "what" and "where." - Brandi_Hoppe0 commented on July 2nd 19 at 18:25
: well, the earth is as a shield from interference and so on and just to save on cables - Mireill commented on July 2nd 19 at 18:28
: I do not understand how connected the earth cable (close) with the shielding, and the more interference protection. - Brandi_Hoppe0 commented on July 2nd 19 at 18:31
: KRC don't know why but everyone is doing two of the ground. probably for reliability and interference-it is well protected from any interference and so on - Mireill commented on July 2nd 19 at 18:34

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