Pin numbers on an HSD connector identify contact positions. They do not automatically tell you which signal is on each contact. A four contact HSD interface used on one camera or display can have a different signal map from another system. Before copying a pinout into a cable drawing, check the connector view, the module pin definition, the signal type, and the complete Side A to Side B pin map.
What Does “HSD Connector Pinout” Mean
An HSD connector pinout can describe three different things: the physical contact numbers, the way the contacts form differential pairs, and the electrical signals assigned to those contacts.
The physical contact layout tells you where Pin 1, Pin 2, Pin 3, and Pin 4 are located when the connector is viewed from a defined side. The differential pair arrangement describes which contacts work together as a signal pair. The signal assignment then defines whether a contact carries data, supply voltage, ground, CAN, LVDS, USB, Ethernet, or another function required by the system.
Why HSD Pin Assignments Differ Between Links
HSD can use the same general connector family for different electrical links. An LVDS camera connection, CAN link, USB interface, or data plus power arrangement can assign the four main contacts differently.
A pinout taken from one camera or display is valid for that interface and for another interface using the same connector variant, viewing reference, and signal definition. A similar HSD housing on another module does not prove that the pin map is the same.
Check the Connector View Before Reading Pin Numbers
Pin numbers need a viewing reference. A mating face view, cable side view, and PCB side view can make the same contact layout appear different.
Cable drawings may also identify the two ends as Side A and Side B. Those labels define the cable ends, but the drawing still needs to show how each connector is being viewed.
The Side A to Side B map may also differ from a simple 1 to 1, 2 to 2, 3 to 3, 4 to 4 connection. Some unidirectional differential links use crossed pin mapping, so follow the complete cable drawing instead of assuming that the same pin number connects directly at both ends.
HSD Pin Assignment Examples by Link Type
The examples below show several contact assignment patterns found in HSD links. They are examples of how the contacts can be used, not a universal wiring table.
| Link Type | Example Use of the Main Contacts | Verify Before Applying |
|---|---|---|
| 1 × LVDS | One differential data pair | Pair location, polarity, connector view and module definition |
| 2 × LVDS | Two differential data pairs | Pair grouping, polarity and Side A to Side B mapping |
| LVDS + power | Differential data pair, Vcc and GND | Data contacts, supply voltage, ground and module port definition |
| CAN + power | CAN H, CAN L, Vcc and GND | Contact assignment, supply requirement and module drawing |
| USB 2.0 + power | D+, D−, Vcc and GND | USB configuration, connector view and device pin definition |
The table is useful for recognizing the assignment pattern. The final pin numbers still come from the connector and module documentation for the link being built.
How to Verify an HSD Pinout Before Using It
Start with the exact connector part number and the module pin definition. Check the connector drawing to confirm the viewing side and contact numbering, then map each Side A contact to the required Side B signal. If the module drawing and cable drawing use different signal names, create a pin to signal cross reference before approving the assembly.
A continuity check can confirm whether the intended conductors reach the expected contacts, but it does not verify the high speed performance of the finished link. Electrical checks such as differential impedance, skew, or crosstalk belong to the system validation requirements, not the pinout definition itself.
FAQ
Conclusion
An HSD pinout is reliable when the contact numbering, connector view, module signal definition, and Side A to Side B cable map all describe the same interface. A four contact HSD connector does not define one fixed signal assignment for every camera, CAN, USB, LVDS, or other data link. If you are confirming an HSD cable assembly, you can share the connector part numbers, module or mating interface drawing, and required pin map with Bafitop for configuration review.