The difference between USB-C interface and Type-C interface

Legendary008

The difference between USB-C interface and Type-C interface [Copy link]

 

The full name of USB-C interface is USB Type-C, which is the next generation interface of USB 3.0. Its highlights are thinner design, faster transmission speed (up to 10Gbps), stronger power transmission (up to 100W). In addition, USB-C interface also supports double-sided insertion, which is more advanced than USB2.0/USB3.0. The following editor will introduce the difference between USB-C interface and Type-C interface .

1. The difference between USB-C interface and Type-C interface

There is no difference between the USB-C interface and the Type-C interface. The Type-C interface and the USB-C interface are actually the same thing. The full name of the USB-C interface is USB Type-C; the USB-C interface has the characteristics of ultra-thin, no front and back sides, and fast transmission speed.

USB-C interface features:

1. Ultra-thin

The old-style USB port is 14mm*6.5mm long, while the USB-C is only 8.4mm*2.6mm.

2. No distinction between front and back

Like the Lightning interface, there will be no problem whether you plug it in the right way up or in the wrong way up, and it is said to be able to withstand 10,000 times of repeated plugging and unplugging.

3. Fast transmission speed

The maximum transfer rate of the USB-C port is 10Gb per second, which is much faster than USB 3.0.

4. Bidirectional transmission

Unlike older USB ports, where power can only be transmitted in one direction, the power transmission of the USB-C port is bidirectional, which means it can have two ways to send power.

5. Strong power supply capability

The standard specification cable equipped with a Type-C connector can pass 3A current, and also supports "USB PD" which exceeds the current USB power supply capability and can provide a maximum of 100W of power.

Type-C workflow:

The Type-C port has 4 pairs of TX/RX wires, 2 pairs of USBD+/D-, a pair of SBU, 2 CCs, 4 VBUS and 4 ground wires.

DFP (Downstream Facing Port) is the master, and UFP (Upstream Facing Port) is the slave. In addition to DFP and UFP, there is also a DRP (Dual Role port). DRP can be a DFP or a UFP. When DRP is connected to UFP, DRP is converted to DFP. When DRP is connected to DFP, DRP is converted to UFP. When two DRPs are connected together, one of them is a DFP and the other is a UFP.

There is a pull-up resistor Rp on the CC pin of DFP and a pull-down resistor Rd on the UFP. When not connected, the VBUS of DFP has no output. After connection, the CC pin is connected, and the CC pin of DFP will detect the pull-down resistor Rd of UFP, indicating that it is connected. DFP will turn on the Vbus power switch and output power to UFP. Which CC pin (CC1, CC2) detects the pull-down resistor determines the direction of the interface insertion and switches RX/TX.

The resistor Rd=5.1k, and the resistor Rp is an uncertain value. According to the previous figure, USB Type-C has several power supply modes. How to distinguish them? It depends on the value of Rp. If the value of Rp is different, the voltage detected by CC pin will be different, and then the power supply mode executed by DFP end will be controlled.

秦天qintian0303

I was shocked. I thought something new was invented. Now the international trend is unified. The interface requirements are unified.

wangerxian

The product has already used the Type-C interface, and it works pretty well.