It is mainly used as a high-speed video expansion chip for host devices and display devices, integrating DP, USB-C, HDMI and other audio and video signals. Expand more signals with higher and more real experience, so as to meet the actual needs of consumers. The specific introduction of KTM50X0 is as follows:
KTM50x0 is a DisplayPort1.4a MST hub, which integrates a USB type-C demultiplexer, mainly for mobile notebook accessories and display applications. The device has the function of multi-stream audio and video distributor and HDCP1 protocol converter. USB Type-C upstream port (UFP) that supports DP alt mode. The 4 high-speed channels of UFP can simultaneously receive DP1.4a MST audio and video and USB3.2 Gen2 data streams. Meet the requirements of standard DP or USB Type-C connector flip orientation. Inbound DP and USB signals are demultiplexed, retimed and transmitted through DFP (Downstream Facing Ports). The KTM50x0 consists of three AC-coupled DP/DP++ or DC-coupled HDMI/DVI DFPs, each with four high-speed lanes and a USB port with a USB3.2 transmit and receive pair. Conversion of incoming DP MST streams to any combination of MST or SST streams on any DFP video port with link rate and lane number change options. Additionally, SST streams can be replicated on two or more DFP ports. In addition, DP SST stream can also be converted to HDMI or DVI output (TMDS signal format).
The combo receiver in the KTM50x0 supports all DP standard data rates up to HBR3 (8.1 Gbps/lane) and USB3.2 Gen1 (5.0 Gbps) and Gen2 (10.0 Gbps). The dual-mode (DP++) transmitter supports DP standard data rates up to 8.1 Gbps/lane and TMDS data rates up to 6.0 Gbps/lane. Sideband channels use 1.0 Mbps Manchester encoded AUX signaling for DP and DDC signaling for HDMI interface up to 100kbps
KTM50x0 can handle up to 6 compressed or uncompressed DP audio and video streams. Reliable reception and transmission of DSC1.2a compressed streams uses FEC decoding and encoding. These streams can be part of a single large video timing, or six separate video timings from a single source with corresponding independent multi-channel audio. The maximum video time per stream and the number of streams transferred are limited by DP1.4a and HDMI2.0 link bandwidth. When receiving DP MST streams in dsc1.2 compressed format, the KTM50x0 can decode these streams (up to 2 streams) or pass them through a downstream receiver or another cascaded KTM50x0 device. If the DP source sends RGB/YCC444 DSC1.2a encoded video at 8k4k60Hz as 4 MSTs at 4k2k60Hz, then 2 KTM50x0 devices are required to decode all 4 streams. The KTM50x0 supports RGB 444 and ycc44/422/420 video pixel encoding formats with color depths up to 16 bpc (bits per component or 48 bits per pixel). It has a pixel processing unit capable of converting the video pixel encoding format from RGB444 to YCC444, and performing bit depth expansion and downscaling from YCC444 to YCC422/420. Pixel format conversion along with horizontal extinction extension improves interoperability and smoothes CVT video timing from mobile PCs to consumer displays such as TVs and projectors that only support CEA timing.
The KTM50x0 handles High Dynamic Range (HDR) video content specified in BT601, BT709, BT2020, BT2100, Adobe RGB colorimetric formats with appropriate metadata conversion from DP to HDMI. HDCP1 also provides secure reception and transmission of high-bandwidth digital audio and video content. x or HDCP2.3 content protection. KTM50x0 acts as a branch device as HDCP1. Use HDCP2.3 and hdcpx repeater between DP source and DP or HDMI sink.
Application scenario:
The KTM50x0 works with an external 25mhz reference clock. The reference clock can be generated by a 25MHz crystal or an external source. It has a 300MHz ARM Cortex M3 CPU with on-chip storage of code and data. Peripheral subsystems include SPI, UART (for debug only), and I2C master and slave interfaces. The internal POR (Power-On Reset) circuit detects the voltage of the reset input and provides chip reset when the system is powered on. The KTM50x0 uses an external 16mbit SPI flash to store RSA-2048 signed application firmware with failsafe recovery. At boot time, the CPU authenticates the application code image stored in the SPI flash through the secure boot process. It supports standard mode and quad mode SPI operation. Firmware update of SPI flash is done securely via DP AUX_CH or I2C host interface (secure system programming).
KTM50x0 applications are:
• Mobile PC dock • Dongles • MST Video Center • AR/VR devices • High-end displays such as digital signage • Area chain monitoring DisplayPort and USB Type-C are the main interfaces in these applications, KTM50x0 provides Highest interface performance for best bill of material cost. In a mobile dock topology, the KTM50x0 is part of a larger system with a system controller such as TCPC, USB hub, etc. The dock can be a traditional dock with custom connectors or a travel dock with a USB Type -C tethered cable. The audio and video interface between the notebook and the docking station is DP or DP Alt-Mode USB Type-C. The KTM50x0 is an ideal device for a Type-C dock, which can function as a Type-C port manager (TCPM), as well as an external TCPC device (eg Kinetic MCDP9000 TCPC). It integrates the functions of USB-C demultiplexer, video hub, protocol converter and HDCP repeater in one chip. The video downstream interface can be configured as DP1.4a or HDMI2.0 requirements.
Cascade Lock Monitor/Signage Applications: Cascade lock monitors or signs with USB Type-C connectors supporting DP alt mode require a USB Type-C demux and a DP MST hub device with two or more video outputs. The KTM50x0 is ideal for this application, it can receive USB and multiple video streams simultaneously. It then sends one of the video streams to the internal SoC and the rest to downstream units. In this use case, the KTM50x0 can support two 4K60Hz displays without DSC or up to four 4K60Hz displays with DSC.
AR/VR Applications Current AR/VR headsets use a video splitter device to route video from the graphics source to the dual OLED panels. Future design goals are higher video resolutions, refresh rates, and low latency. The KTM50x0 is suitable for such a design; it can provide up to 2x 2560x2160 @ 120 Hz without DSC or up to 2x 3860x2160 @ 90 Hz with DSC. Additionally, the KTM50x0 can generate a global frame sync signal to synchronize the video with the sensor input. It can also provide up to 8CH compressed or LPCM audio via I2S or TDM format audio codec for the best quality audio experience.
Schematic diagram of the schematic diagram:
Application schematic diagram:
UFP/USB
DFP signal line part
DFP HDMI DC CUOPLED, power supply part
DFP HDMI AC power supply part
Since KTM50X0 uses LFBGA Package 289-Pin 12.0mm x 12.0mm x 1.3mm, 0.65mm pitch, there is no way to upload the complete application schematic diagram . It can provide technical support such as software and hardware, and friends who have applied it are welcome to leave a message for exchange.