SLAAEM9 June   2024 TMUXHS4446

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2USB Type-C Alt Mode Application
    1. 2.1 What is Type-C Alt Mode?
    2. 2.2 Why USB Type-C Alt Mode Need Multiplexer
    3. 2.3 When to Use Passive Multiplexer for Type-C Alt Mode application
  6. 3Type-C Alt Mode Application with Passive Multiplexer TMUXHS4446
    1. 3.1 Type-C Alt Mode Source Application
    2. 3.2 Type-C Alt Mode Sink Application
    3. 3.3 Pin Assignment for Source and Sink Application
  7. 4PCB Design For TMUXHS4446
  8. 5Summary
  9. 6References

3.3 Pin Assignment for Source and Sink Application

VESA defines different pin assignments on the USB Type-C connector when sending and receiving DisplayPort signaling. Six possible pin assignments are defined for USB Type-C configured to perform as a Display Source (DFP_D) – A, B, C, D, E, or F. Five possible pin assignments are defined for USB Type-C configured to perform as a Display Sink (UFP_D) – A, B, C, D, or E. Pin Assignments A, B, C, and D are intended for use with:

  • USB Type-C to USB Type-C Cables
  • Adapters from USB Type-C to other video standards such as VGA, DVI, HDMI.

Pin Assignments E and F are intended for use with adapters from USB Type-C to DisplayPort plugs or receptacles. For additional details on pin assignment, refer to the DP_Alt_Mode_on_USB_Type-C specification. Table 3-1 is the pin mapping table between TMUXHS4446 and Type-C receptacle for source and sink application.

Table 3-1 Pin Mapping Between TMUXHS4446 and Type-C Receptacle for Source and Sink Application
TMUXHS4446 Pin Number TMUXHS4446 Pin Name CC Receptacle Pin name for Source CC Receptacle Pin name for Sink
33,34 CRX2 SSRX2 SSTX2
30,31 CTX2 SSTX2 SSRX2
27,28 CTX1 SSTX1 SSRX1
24,25 CRX1 SSRX1 SSTX1
22 SBU1 SBU1 SBU2
21 SBU2 SBU2 SBU1