TypeC to DP video output module

Based on the USBC AltMode mode of CH543, the PD protocol communication verification
 
is normal. When applying the TypeC female socket, the MUX chip is required to switch. Based on this, there are the following two application methods:
 
1 Type-C to DP interface
    TypeC female port The terminal uses 4 sets of differential data pairs for the DP interface, which is the 4lane DP port in daily use, which is the method used by this open source solution. The D+D- of USB2.0 is used to update firmware data online and is not exported.
 
2 Type-C to DP+USB interface
  TypeC female port terminal uses 2 sets of differential data pairs for the DP interface, and the other two pairs are used for the USB 3.0 data lines SSRX and SSTX. However, 2lane DP is inconvenient to use large DP terminals for 2lane output, and can be converted to edp interface output (not produced).
3 Introduction to CH9445
● 4:4 or 4:6 cross-channel ultra-high-speed differential signal MUX switch. ● Support USB3.1 10Gbps signal. ● Support DP1.4 8Gbps signal. ● Provide crossbar circuitry for CSBU and SBU pins. ● Control and configure multi-channel MUX switching through the I2C two-wire interface. ● Provides 4 GPIO pins, and GPIO supports interrupts. ● Support low power consumption mode. ● Provide QFN32-4x4mm package form. 
 
4 Project Progress
[2023.01.11]
 [V4 Version]
Bug, monitor CC2 cannot communicate normally to apply for AltMode mode, but when using iPad Pro11 device to output video, both CC1 and CC2 can be recognized.
 
【2023.01.08】
 【V4 version】
Welding completed, code and equipment testing.
 
【2022.12.27】
 PCB V4 version proofing, waiting for production ring release.
 
【2022.05.20】
 【V3 version】
Using HD3SS460, the bandwidth supports DP1.2
 
5 Photo Album