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HDMI silicon solutions and ESD circuit protection strategy

Categories: SolutionsStars: 3StarsVisit: -Release time: 2011-05-07 09:38:00
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With the increasing of high-definition content sources and whole hd content in the introduction of HDMI technology, to higher bandwidth and more functional direction. The latest HDMI1.3 version not only support consumer electronic control (CEC) function, audio and video synchronous ability and new compressed digital audio format without a loss, will also single link bandwidth 165MHz Gbps) from 4.95 to increase (Gbps), 340MHz (10.2 to support the future of deeper high-definition display device, higher resolution color, and higher frame rate requirements. The HDMI receiver and transmitter, buffer, switch, cables, connectors components raised taller requirement, also give ESD protection, EMI noise-suppressing bring greater challenges.

How to choose the right solution and HDMI silicon connector and cable and how the cost with optimizing without sacrificing performance cases do ESD protection, EMI noise suppression, how to properly using various predictive test fast through the authorization center of testing, HDMI equipment design engineers are faced with is the key problem. The publisher will in July 2008 and August and September issue continuous phase iii discuss HDMI design and test key problems and solving methods. As the first part of this series of articles, this paper focuses on the HDMI silicon solutions and ESD protection, EMI noise suppression method.


Double road/multiple input receiver reduce design cost


Now more and more digital cameras and digital cameras can provide high-definition pictures and video, hd DVD players and PC in the big screen play hd video DTV demand was soaring DTV, therefore require multiple HDMI to meet these show demand. In the design that contains many HDMI equipment, choose double road input or multiple input to reduce costs. HDMI receiver These devices include NXP (NXP semiconductor wafer) TDA19978, John CAT6023, renesas technology of the SiliconImage R8J66030FT, the technology of SiI9223, ADI AD9388A. These chips in support multiple input ports, but also a more functional integration.


NXP four road TDA19978 HDMI1.3 receiver input in four independent HDMI input embedded in the extended display recognition respectively EDID) memory data (HDTV, can reduce the overall costs. Its the biggest link frequency was 2.3 GHz, support for all of the hd TV formats, such as 1080p / 60Hz TV format and 60Hz UXGA display resolution of computer under format.


ADI AD9388A integration of the company had a 12 channels analog input device equalizer and a double road input HDMI1.3 receiver. This device also embeds the broadband digital content protection (HDCP) key storage and EDIDRAM, compared with division solutions, can reduce the total system complexity and cost.


The renesas technology R8J66030FTHDMI1. 3 receivers in a chip provides three input ports and CEC control functions, support 1080p thirty-six of brunet with the operation 225MHz speed. This chip adopt an equalizer docking received signals through long integer, HDMI cables realize high-speed operation.


"HDMI1.3 receiver and transmitter and switches must support the high-speed T_MDS its kernel, HDMI1.3 norms. In HDMI1.2 compatible standard, 1080p / 24b signal transmission requirements, while in the clock 150MHz HDMI1.3, support 1080p / 36b brunet signal clock frequency for 225MHz requirements." SiliconImage company's product marketing manager WaheedRasheed said. The company's four road input HDMI1.3 receiver SiI9223 adopts the latest generation of T_MDS kernel technology, automatic detecting input signals required for long cable equilibrium, appropriate support. Link