Nowadays, waterproof type-C has been widely used in the mobile phone industry, and people also love this user-friendly interface. However, many laymen's understanding of the C-type USB interface is only superficial, with little understanding of its principles and characteristics. Here, we will introduce you to the PIN pin definition of waterproof type-c, in order to understand its usage principle.

The waterproof type-c has 24 pins, including 4 pairs of TX/RX differential wires, 2 pairs of USB D+/D -, 1 pair of SBU, 2 CCs, 4 VBUS, and 4 ground wires. In general, 2 pairs of TX/RX differential lines are used for data transmission, and can be connected either forward or backward. The remaining two pairs of differential lines can be used for DP signal loading. If the receiving end only requires a DP signal and does not require a USB 3.1 signal, then all four pairs of differential lines can be used for output. This means that the waterproof type-c can achieve a total output bandwidth of 32.4Gbps and support high-definition video data transmission.

In order to be compatible with USB 2.0, the waterproof type-c retains the USB D+/D-signal. Therefore, through an interface converter, the C-type USB interface can also be connected to USB 2.0 devices for use. The two CC lines and two SBU lines of the C-type USB interface also play an important role. The CC line is mainly used for communication with the power transmission module (hereinafter referred to as PD), which can determine the insertion direction of electronic devices. If it is a forward insertion, the host uses CC1 to communicate with the device, while the reverse insertion uses CC2. It can be seen that CC uses Single Wire Protocol. When the SBU cable DP function is turned on, it becomes AU in the DP protocol_ XP/AUX_ The N differential line will be responsible for transmitting critical information such as the device's EDID.

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