USB2.0 docking station

Statement: For design reference only, commercial use is prohibited!
0. Explanation of terms:
SBU1 and SBU2 of Type-C are auxiliary signals and have different uses in different application scenarios. For example, when transmitting DP signals in the DP ALT MODE mode of high-definition video transmission, it is used as an audio transmission channel. When entering the TYPE-C analog audio headset accessory mode, it is used as a microphone signal transmission channel.
①CC (Configuration Channel):
Configuration channel, this is a new key channel in USBType-C. Its functions include detecting forward and reverse insertion, detecting how much voltage and current USB connection identification can provide, establishing and managing the connection between data and VBUS between USB devices, etc.
②DFP (Downstream Facing Port):
Downstream port, which can be understood as Host. DFP provides VBUS and can provide data. In the protocol specification, DFP specifically refers to the downstream transmission of data. In a general sense, it refers to the equipment for data downstream and external power supply. A typical DFP device is a power adapter.
③UFP (Upstream Facing Port):
Upstream port, which can be understood as Device. UFP takes power from VBUS and can provide data. Typical devices are USB flash drives and mobile hard drives.
④DRP (Dual Role Port):
Dual role port. DRP can be used as either DFP (Host) or UFP (Device), and can also dynamically switch between DFP and UFP. A typical DRP device is a laptop. 1.
Basic features of SL2.1A
1. Supports high-speed (480MHz) mode, full-speed (12MHz) mode and low-speed (1.5MHz) mode
2. Integrated upstream 1.5K pull-up resistor, downstream 15K pull-down resistor and series resistor
3. Integrated 5V~ 3.3V and 1.8V voltage regulators
4. Integrated power-on reset circuit
5. Integrated 12MHz crystal oscillator with feedback resistor and crystal oscillator load capacitor
6. Integrated over-current detection and automatic monitoring of self-power supply status
7. Supports port status detection
2. Physical and test picture