With the dust settling on Apple’s iPhone 15 using the Type-C interface, the Type-C interface has finally achieved unification.
Why use the word "unified"? This is naturally because Type-C is so widely used. Not only are all mobile phones except Apple iPhone equipped with this interface, but even mobile solid-state hard drives PSSD, digital cameras, home surveillance cameras, driving recorders and other messy things have also been used for a long time, so it is not excessive for everyone to cheer, and finally the same data cable and charger can be used.
However, doubts also arise. The speed of the Type-C interface of each version of Apple iPhone15 is different? It is revealed that the speed of the Type-C interface of the standard version of iPhone 15 may be limited to 480Mbps, which is the level of USB 2.0.
The Type-C interface of the Pro version of iPhone 15 will reach 20Gbps, which is the standard of USB3.2 Gen2x2, and may even directly support Thunderbolt 3 technology, with a speed of up to 40Gbps. Why is there such a big gap?
According to the revelation, this is mainly because the iPhone 15 still uses the previous generation A16 processor and still only supports USB2.0 data transmission. The Pro version will be equipped with the latest A17 processor, providing support for USB3.2 and even Thunderbolt.
In addition to the processor bandwidth, the internal differences of the Type-C interface will also lead to different supported speeds. After all, now whether it is USB2.0, USB3.2 or Thunderbolt, they can all be made into Type-C, and the Type-C that supports high-power fast charging and video output is called full-featured Type-C.
The figure below shows the structure of a full-featured 24pin Type-C interface. You can see that it contains USB2.0 information, USB3.2 information, video signal, charging mode confirmation, etc.
However, you don't need to be too surprised. Since the Type-C interface is a data line interface that can be inserted in either direction, the functions of the upper and lower rows of gold fingers inside the interface are the same. However, even so, a full-function Type-C cable must contain 12 wires, so the diameter of the wire is much thicker than that of an ordinary Type-C cable, even close to that of an HDMI/DP cable.
After talking about the full-function Type-C interface, the following content is simple. For example, if video transmission and high-speed data transmission are not supported, you can directly subtract from the Type-C interface, so there are 16-pin and 12-pin Type-C interfaces. The following is the definition of the 12-pin Type-C interface. It can be seen that it removes some computer pins used for high-speed transmission of USB3.2 and video, and a total of 8 pins are cut off on the front and back, and 12 pins come from this.
However, the 16-pin interface only needs 12 pins when performing SMT patching, and the pins close to each other share a package pin, so it is essentially no different from the 12-pin interface and can share the patch PCB package. The figure below is a 16-pin Type-C interface.
Don't think that's the end. If a cable is only used for charging and does not even have USB2.0 data transmission, then you can continue to subtract from the Type-C interface, so the 6-pin Type-C interface appears. It is based on the 12-pin, and the USB2.0 D+ and D- pins and the shielding layer ground pins are cut off, with a total of 6 pins on the front and back.
The only three pins left are Vbus, GND, CC1 (CC2 on the back), with a total of 6 pins on the front and back, of which CC1 and CC2 pins are used to support forward and reverse access, as well as support for fast charging protocols. If this charging cable does not support fast charging, then even CC1 and CC2 can be omitted. The following figure is a 6-pin Type-C interface.
It can be seen that although the USB Type-C interface looks the same, the number of internal pins and the number of SMT patch pins on the PCB may be different, and this is usually done based on the actual needs of the device. So, those friends who think that their Type-C data cable is slow and slow to charge, do you understand something?