Mon Nov 14 21:15:20 CST 2022
The USB Type-C connector has 24 pins.
- GND - 4 pcs
- Differential pairs - 4 Pairs
- VBUS - 4 pcs
- CC - 2 pcs
- SBU – 2 pcs
- Signal - 2 Pairs
The USB Type-C aims to provide blazing fast data transfer speeds along with high levels of power flow. These features may require the use of special cables that are electronically marked by employing a chip inside. Besides, some active cables utilize a re-driver chip to strengthen the signal and compensate for the losses incurred by the cable, etc. In these cases, we can power the circuitry inside the cable by applying a 5-V, 1-W power supply to the VCONN pin. This is shown in below Figure.
The active cable uses the Ra resistors to pull down the CC2 pins. The value of Ra is different from Rd so the DFP is still able to determine the cable orientation by examining the voltage on the DFP CC1 and CC2 pins. After determining the cable orientation, the channel configuration pin corresponding to the “Active Cable IC” will be connected to a 5-V, 1-W supply to power the circuitry inside the cable. For example, in Figure 5, the valid Rp-Rd path corresponds to the CC1 pin. Hence, the CC2 pin is connected to the supply denoted by VCONN.
These two pins correspond to low-speed signal paths that are used only in the Alternate Mode.
SBU means : Sideband Use. SBU signals are used in the Alternate Mode supported by the Type-C specification, which enables multi-purposing of Type-C signals for alternate uses such as DisplayPort.
Related knowledge:
>>> USB-C-Pins-explanation--1.html
>>> USB-C-Pins-explanation--2.html
By HornmicLink_Henry @221114 21:15