GMSL is a high-speed serial interface launched by Maxim Corporation, which is suitable for the transmission of video, audio, and control signals. When using 50Ω coaxial cable or 100Ω shielded twisted pair (STP) cable, the distance can reach 15m or more.
Maxim's solution is divided into GMSL (first generation) ， GMSL2 and GMSL3. GMSL2 is compatible with GMSL (first generation). Therefore, in Maxim's Camera SerDes scheme, transceivers can be randomly matched.The new GMSL3 standard (12 Gbit/s) is the third generation of Maxim’s Gigabit Multimedia Serial Link. With this interface, image sensors can operate at full MIPI CSI-2 / D-PHY v1.2 specifications (4 lanes at 2.5 Gbps each), enabling vision systems with an uncompressed 4K resolution at 90 fps, delivering smooth video streams. In addition, over a single Power over Coax (PoC) cable, enabling smooth and crisp clear sensor fusion, surround view or stereoscopic 3D imaging in real-time.
ADAS cameras as an example, this is also the main area of GMSL application. Generally speaking, in addition to sending captured image data externally, cameras also send frame synchronization signals, line synchronization signals, pixel clocks, and other information, as well as power supply. It is a parallel bus composed of many signal lines, which does not have an advantage in high-speed data transmission. Therefore, we need to combine these parallel signals into serial signals, And then transmit it at a higher frequency.
