Decoded USB C Wiring Diagrams and Color Code Analysis.

USB C To USB A 3.X Wiring Diagram:

• In accordance with USB standards, the VBUS line carries a voltage of +5V and can deliver an output current of up to 3.0A.
• Pin number 1 of the USB Type A 3.1 male connector corresponds to Pin numbers A4, A9, B4, and B9 of the USB Type C. This pin, denoted as (+VDD/VBUS), serves the dual purpose of supplying power to the connected device and acting as an indicator for a successful handshake signal, signaling that the device is successfully connected.
• For Pin number 4 on (Port1) USB Type A 3.1 male, it connects to Pin numbers A1, A12, B1, and B12 on (Port2) USB-C, representing the ground return (GND) with a distinctive black-colored wire.
• Pin number 3 of the USB 3.1 Type A male links to Pin number A6 on Port 2.
• Pin number 2 from the USB Type A male connector connects to Pin number A7 on Port 2. Both Pin number 2/A7 (D-) and Pin number 3/A6 (D+) serve as differential data pins for each port, facilitating data transmission in USB 2.0 mode when used in reverse compatibility mode with previous-generation USB hosts.
• Pin 7 is utilized as a Drain/Shell connection.
• Pin number 5 (SSRX-) from Port 1 is connected to Pin number A3 (TX1-) of Port 2, while Pin number 5 (SSRX+) from Port 1 is linked to Pin number A3 (TX1+) of Port 2. These connections represent bidirectional data SuperSpeed Transmitter ends. Note that SSRXp1 can be expressed as SSRX1+ and SSRXn1 can be represented as SSRX1-.
• Similarly, Pin number 8 (SSRX-) from Port 1 is linked to Pin number B10 (RX1-) of Port 2, and Pin number 9 (SSRX+) from Port 1 is connected to Pin number B11 (RX1+) of Port 2. These connections also represent bidirectional data SuperSpeed Transmitter ends. Note that SSTXp1 can be written as SSTX1+ and SSTXn1 can be expressed as SSTX1-.

USB A to USB C 2.0 Wiring charging:

The provided USB C wiring diagram illustrates the assembly diagram for a “USB Type C to USB 2.0 type cable.” Both USB charging cables and USB OTG cables share the same assembly diagram, differing only in terms of their ports. Specifically, USB 2.0 type A male and female connectors have the same wiring configuration, with the distinction lying in the port itself.

In practical terms, this means that one end of the cable is standardized, featuring the USB C port, while the other end can take one of two forms: USB A male or USB A female connectors. These two variations serve different purposes, with one being a USB charging and data cable, and the other serving as a USB OTG cable, facilitating On-The-Go connectivity.
Within the internal wiring diagram of a USB A to USB C 2.0 charging and data cable, it’s essential to note the significance of pin A5 (CC), which is connected in series with a resistor marked as Rp, featuring options like 5.1kΩ, 5.3kΩ, or 5.6kΩ. The specific value of Rp is pivotal as it determines the cable’s or device’s current-carrying capacity for which it is designed.
For high-quality USB cables, it is strongly recommended to incorporate internal shielding for all wires, ensuring 360-degree shield termination at both cable ends. This shielding, known as SHELL, SHIELD, or BRAID, consists of conductive material and is grounded at both terminations. The primary purpose of this shielding is to effectively ward off undesirable RF interference and noise signals, thereby enhancing cable performance.

The USB Type-C to HDMI connection involves intricate pin mapping and hardware components, allowing for the transmission of HDMI signals. HDMI Type-A and USB Type-C connectors are utilized to achieve this connection. The following details provide a comprehensive understanding of this connection.

HDMI Pin Mapping.
The standard HDMI Type-A connector comprises 19 pins, including three high-speed data channels transmitted as shielded twisted pairs. In the Figure below, you can observe the HDMI Type A connector, which features three TMDS pairs and their clock signal.

As you can see the HDMI Type A connector has 19 pins. Also, it includes three high-speed data channels as shielded twisted pairs
Below , you can see the pin mapping for HDMI in USB Type-C Alternate Mode. This mapping is essential for connecting HDMI signals through a USB Type-C port.

Initializing HDMI Alternate Mode.
The USB Power Delivery (USB PD) specification defines the sequence of events necessary to initiate the HDMI Alternate Mode. When connecting a USB PD-enabled Type-C cable between two ports, negotiations occur over the CC line. These negotiations establish the use of USB or Alternate Mode and identify the specific Alt Mode standard.

To add HDMI functionality to a USB Type-C port, specific hardware components are required, as depicted in the below figure. These components include the Alternate Mode Physical Layer Device (PHY), the Alternate Mode Multiplexer (MUX), and the USB PD PHY and PD manager.

While dedicated chipsets for HDMI Alt Mode are still in development, DisplayPort Alt Mode parts can be utilized by incorporating an HDMI format converter. The design relies on components like the Texas Instruments’ TPS65982 USB Type-C and PD controller and the HD3SS460 high-speed multiplexer/demultiplexer. Additionally, a video converter is used to switch between DisplayPort and HDMI formats.

This implementation highlights the complexities and considerations involved in establishing HDMI Alternate Mode through a USB Type-C connection, allowing users to transmit HDMI signals with reliability and quality.

The micro USB connector has been widely used for charging mobile phones and portable devices due to its compact design. Some manufacturers create charging-only cables by excluding the data pins to reduce costs.

• In terms of connections, pin no.1 from a micro USB  male connector is linked to pins A4, A9, B4, and B9on the USB C end. This pin serves as the power supply, denoted as (+VDD/ VBUS). It isresponsible for delivering power to the connected device and acts as an indicator for the handshake signalsignifying that the device is successfully connected.
• Additionally, pin no.2&3 from the micro USB male is connected to pin A6&A7 on the USB C end. BothPin no. 2/A7 (D-) and pin no. 3/A6 (D+) are utilized as a differential data pin in each port, with datatransmitted andreceived following the USB protocol.
• Micro USB pin 4 supports CBUS: hot plug.
• Furtherm ore, pin no.5 from the micro USB male is connected to pins A1, A12, B1, and B12 on the microUSB C end. designated as the ground supply (GND) responsible for establishing a ground connection.

While micro USB has been dominant, a newer and more advanced version called USB-C has emerged. USB-C offers reversible insertion, allowing the connector to be plugged in from any orientation. This is a significant improvement compared to the directional nature of micro USB.

USB-C to AUX adapters or cables are used to connect devices with a USB-C port, such as smartphones or laptops, to audio devices with an AUX (3.5mm)  port input, like headphones or speakers.

The USB-C connector has multiple pins, but for audio transmission, it primarily utilizes the analog audio pins. The wiring diagram for a USB-C to AUX cable typically involves connecting the corresponding pins of the USB-C connector to the appropriate contacts of the AUX connector.

USB-C Connector:

• VBUS (Power): This pin carries the power supply for the AUX device.
• GND (Ground): This pin is connected to the ground of both the USB-C and AUX connectors.
• CC (Configuration Channel): This pin is responsible for identifying the type of device connected and negotiating power delivery.
• D+ and D- (Data): These pins are typically not used for audio connections but are essential for data transfer in USB-C cables.

AUX Connector:

• Connect the AUX Ground contact to the USB-C Ground pin.
• Connect the AUX Left Audio contact to the USB-C Left Audio Out pin.
• Connect the AUX Right Audio contact to the USB-C Right Audio Out pin.

USB-C is a digital interface, while VGA is an analog video format. Therefore, a direct physical wiring diagram for USB-C to VGA conversion does not exist.

To connect a USB-C device to a VGA display, you will need an active USB-C to VGA adapter or cable. These adapters incorporate electronics to convert the digital signal from the USB-C port to an analog VGA signal.
The adapter or cable will have a USB-C connector on one end, which plugs into the USB-C port of your device, and a VGA connector on the other end that connects to the VGA input of your display. The conversion process happens within the adapter or cable itself.