# References Source: [https://docs.qualcomm.com/doc/80-70014-251/topic/references.html](https://docs.qualcomm.com/doc/80-70014-251/topic/references.html) - **[Low-speed and high-speed expansion connectors](https://docs.qualcomm.com/doc/80-70014-251/topic/low_speed_high_speed_expansion_connectors.html)** This section provides tables listing the functionalities, pin numbers, GPIOs, and additional details for each low-speed and high-speed connector on the RB3 Gen 2 mainboard. - **[DIP switches](https://docs.qualcomm.com/doc/80-70014-251/topic/rb3_dip_switches.html)** This section provides details and shows the location of the DIP switches on the mainboard, interposer, and vision mezzanine. - **[QCS6490 thermal testing and results](https://docs.qualcomm.com/doc/80-70014-251/topic/thermal_testing.html)** - **[Related documents](https://docs.qualcomm.com/doc/80-70014-251/topic/rel-docs.html)** List of reference documents and drawings. - **[Acronyms and terms](https://docs.qualcomm.com/doc/80-70014-251/topic/acronyms_and_terms.html)** List of acronymns and terms used in this document. Last Published: Jan 28, 2026 [Previous Topic Hardware overview](https://docs.qualcomm.com/bundle/publicresource/80-70014-251/topics/rb3_hardware_overview.md) [Next Topic Low-speed and high-speed expansion connectors](https://docs.qualcomm.com/bundle/publicresource/80-70014-251/topics/low_speed_high_speed_expansion_connectors.md)