USB2.0 docking station, based on SL2.1A, with multiple interface options available

 
Video display and introduction of station b.
 
This solution uses the most common SL2.1A solution, which realizes one-to-four. The USB2.0 transmission speed is average. It is enough to plug in a mouse and keyboard every day.
 
A variety of interface methods are available.
 
 
Perfectly supports USB2.0 high-speed (480MHz), USB2.0 full-speed (12MHz), and low-speed mode (1.5MHz).
 
 
The power input terminal is equipped with a self-restoring fuse, which effectively prevents external device failures from burning out the computer interface and plays a certain protective role. . PS: One wire can be used instead of
 
 
differential wiring! ! ! Differential routing! ! ! Differential routing! ! !
 
Key point: Whether it is the signal line connected to the chip or the signal line led out of the chip (that is, the wiring of pins 1-10), each group must use differential lines. For example, DM and DP must be differentially routed and coupled to each other. To ensure normal communication.
 
Capacitors must be added to pins 13 and 14 respectively so that the chip can work stably.
 
 
The four sets of outputs and one set of inputs on this board are differential transmission. The differential traces must be two lines of equal length, equal width, close proximity, and on the same level. .
 
 
This project also includes a 3D shell model. The overall assembly is not a big problem and it is up to everyone to perfect the details.