Thursday, March 23rd, 2017

MHL 2.0 update from Silicon Image


October 2012 - Silicon Image gave an update on several of the new products addressing the MHL 2.0 specification. These parts support full 1080p video at 60 fps including 3D displays and content. Thier mobile transmitter product now includes a 4:1 mux to allow for multi-application for the single connector interface which is typically a micro-USB plug. The mux allows for data transfer, charging, audio and remote control and computer interface connections based on identification of the signal going through the port.

Silicon Image SiI9296 MHL to HDMI bridge

They introduced a bridge product the SiI9296 which is a an HDMI1.4 to MHL2.0 (3D) compliant interface. This product will also support DVI interfaces to the MHL products. A challenge with these bridge circuit is the legacy capability of the HDTV with the HDMI interface. The MHL protocol uses RCP for the remote control interface. Older HDTV monitors and TVs cannot talk to the MHL module with remote control interface if the TV is CEC enabled for the remote control. Without this interface, just the video and audio pass through, but no menu control. An associated product the SiI1296 does an MHL 2.0 to VGA to UXGA interface for connection of the mobile devices to traditional computer monitors without the need for a computer.

Silicon Image SiI9293 Dual MHL / HDMI


One of the features of the MHL specification is the ability to charge and power the mobile device. If connected to a non-MHL enabled monitor/HDTV (one with just HDMI, DVI, VGA, etc) the charging function has to be implemented with a subsequent power point connection to the cable. Most of these alternate systems using a bridge chip use a power adapater for this funciton. The power aspect is an OEM change on the part of the HDTV/monitor manufacturer.

Adding to the new parts is the SiI9293 hich is a Dual HDMI/MHL receive block the output is a digital RGB stream that can be directed to an MHL host. This chip will auto-detect and auto-select the HDMI or MHL output toype and select the correct processing method. This chip is targeted for the projector, pico-projector, TV and digital signage product space.

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