HDMI® IPAD™ product presentation HDMI signal conditioning Is this presentation suited for you? Where do you stand with HDMI® interfacing? Beginner? Intermediate? Advanced? I am not familiar with this subject. I am in the discovery phase and would like an overview and a basic understanding of the technology. I have a basic understanding of this subject. I would like to go deeper in details and tackle more aspects of this subject. I am very familiar with this subject. I would like to deepen my knowledge and become an expert. Click here to continue to next slide Click here to open new presentation Click here to open new presentation Overview Basic In depth 2 High-definition multimedia interface (HDMI) Ecosystem HDMI connectors address many applications 3 HDMI connector ESD protection requirements HDMI connector High frequency Differential signaling 18 16 14 12 10 8 19 17 15 13 11 9 7 6 5 4 3 2 1 Datalines Control lines Low frequency I²C bus must drive poor-quality cables Power supply 5 V DC Requires current limiter 4 HDMI connector ESD protection is needed for… Advanced technology with very thin lithography and gate oxide highly vulnerable to ESD Integrated electronics systems with PCBs having a high component density facilitate ESD coupling and propagation Core ICs such as microcontrollers, micro-processors, transceivers, etc. IC manufacturers reluctant to make robust embedded ESD protection diodes that would require a significant active area of their advanced and expensive technology. When the application uses RF (Wi-Fi or Bluetooth), a common-mode filter is required, in addition to ESD protection, to avoid RF performance decrease due to the EMI generated by the high-speed link. 5 HDMI – Dataline ESD protection Why ultra-low capacitance ? • The parasitic capacitance of ESD protection devices must be low enough to allow HDMI signals to be transmitted without degradation. • A high parasitic capacitance of the ESD protection devices would increase too much the signal rise/fall time and prevent the communication. Example of the impact of parasitic capacitance on an HDMI signal simulated with discrete capacitance Time domain Fall time too HIGH Frequency domain Bandwidth is too narrow Rise time too HIGH 6 6 HDMI – Control lines: Why a specific I²C driver? • The parasitic capacitance of poor quality or long cables increases the rise time of the I²C bus used by the High-bandwidth Digital Content Protection (HDCP) protocol. • If this rise time exceeds the HDMI specification, a blue screen prevents the user from watching their video content. • To mitigate this issue, an optimized I²C timing booster is needed. Without optimized I²C booster Rise time > 1200 ns High risk of interoperability issue With ST's optimized I²C booster Rise time < 400 ns I²C timing compliant with HDMI rise time < 400 ns 7 HDMI – Power supply • The 5 V pin of the HDMI connector provides power to devices connected to the HDMI source. • The HDMI specification allows: • Up to 500 mA of maximum output current from the source • Up to 55 mA of maximum sunk current HDMI connector • Up to 100 mV of maximum voltage drop-out 2 4 3 6 5 7 18 16 14 12 10 8 FAULT UVLO 19 17 15 13 11 9 or RPU_FAULT OTP decoupling capacitance decoupling capacitance HDMI ASIC +5V_OUT VDD_5V VDD_IC 1 5V IC rise time < 400 ns 8 HDMI placement and layout - Tips High-speed data Needs ESD protection close to HDMI connector Routing is impedance-controlled Interface IC Single-chip interface is recommended for easier layout HDMI chipset Cannot integrate system-level ESD protection (+8000 V) as per IEC 61000-4-2 Level 4 it requires an interface IC with system-level ESD protection Compliant with the basic HDMI specification, it will not handle optimized I²C booster 9 ST’s HDMI product line-up Data lines TMDS ESD protection CONTROL LINES ESD protection I²C booster HPD signal conditioning S o u r c e HDMI2C1-14HDS S n i k HDMI2C2-14HD CEC handling level shifter HEAC signal +5 V current limiter HDMI2C1-14HD HDMI2C1-6C1 HDMI2C1-14HD & HDMI2C2-14HD QFN 36L 500-µm pitch 6.5 x 3.5 mm HDMI2C1-14HDS QFN 24L 500-µm pitch 4 x 4 mm HDMI2C1-6C1 QFN 18L 500-µm pitch 3.5 x 3.5 mm 5 V & I²C backdrive protection ENABLE signal 10 ST solution for HDMI interfaces w/ RF HDMI application with RF Requires ESD integrated common-mode filter on datalines with ST’s ECMF series 11 ST solution for HDMI interfaces w/o RF HDMI application without RF Requires single-chip HDMI interface IC such as HDMI2Cx-14HDx 12 Let’s go further Basic presentation Intermediate product presentation soon available: ‘Understanding HDMI IPAD™ series specification’ Datasheets: In-depth information HDMI2C1-14HD: ESD protection & signal conditioning for HDMI 2.0 source interface HDMI2C2-14HD: ESD protection & signal booster for HDMI™ 2.0 sink interface HDMI2C1-6C1: ESD protection and signal booster for HDMI™ Source control stage interface Application Notes: Selection 13 TVS short-pulse dynamic resistance measurement ... (AN4022) IEC 61000-4-2 standard testing (AN3353) Selection guide [pdf] www.st.com/hdmi-ipad 14 Thank you