1. 基本介紹
MS9601是一款HDMI 3進1出切換器，符合HDMI1.4標準，具有TMDS輸入均衡和輸出低抖
動的特點，可在單芯片解決方案中提供TMDS(每端口4通道)、DDC(SCL/SDA)和HPD的HDMI全
鏈路切換，簡化多個HDMI輸入端口應用場景下的系統級設計。
MS9601提供3路HDMI輸入端口和1路HDMI輸出端口。芯片從3路輸入信號中選擇1路，產
生全兼容HDMI信號輸出。輸入信號切換機制有手動和自動兩種：手動切換通過I2C指令讀寫寄
存器實現，自動切換通過芯片內部集成的檢測及切換電路實現，兩種機制可同時有效。當某1路
輸入信號被選擇輸出后，該路的TMDS輸入通過3選1多路復用器連接到輸出端口的TMDS通道，
所選輸入端口的DDC接口連接到輸出端口的DDC接口，所選輸入端口的HPD信號狀態與輸出端
口HPD信號狀態保持一致。未使用的輸入端口TMDS輸入與TMDS輸出斷接，DDC通道隔離以及
HPD輸出保持低電平
每個TMDS通道信號支持高達3Gbps的速率。HDMI接收器終端集成50Ω上拉電阻（上拉至
電源VDD33），同時輸出端口的反向端接也保證了信號的完整性。可以通過I2C接口對寄存器進
行編程來調整輸入均衡器參數及輸出驅動能力。在I2C控制模式下，可以設置高級配置，使用更
多系統功能，并讀取芯片內部狀態。此外，兩個可選的I2C地址便于多芯片應用。
MS9601內部集成兩個穩壓器，為芯片正常運行提供所有必要的電源，連同內置邊帶開關和
內部上拉/下拉電阻，可顯著減少電路板面積和BOM成本。同時，低功耗運行消除了大多數應用
中對外部電源的依賴，提高了使用的便利性。

2. 功能特征
? 符合HDMI1.4版本規范
? 支持的數據速率高達3Gbps
? 所有輸入和輸出端口集成終端匹配
? 輸入和輸出端口都支持AC或DC耦合
? 可編程輸入均衡器
? 輸入5V電源檢測
? 可編程輸出驅動
? 內置5V ~ 3.3V/1.8V穩壓器
? 引腳控制或I2C控制模式
? 集成3位ADC用于引腳控制
? 可選的I2C地址
? 輸入切換模式:自動和手動
? 通過I2C進行手動輸入切換
? DDC/HPD內部切換
封裝
? LQFP-64 (10mm×10mm)封裝
? 無鉛、符合RoHS要求
3. 應用場景
? 電視購物
? 視頻會議

? 安防監控

General Description
The MS9601 is a 3-to-1 active switch featuring equalized TMDS inputs and low jitter TMDS outputs, targeted
for ultra high-resolution video networks based on HDMI1.4 standard. The MS9601 is a complete HDMI link
switch that provides TMDS (4 channels per port), DDC (SCL/SDA) and HPD switching in a single-chip solution.
It simplifies system level design for applications requiring multiple HDMI input ports.
The MS9601 provides three HDMI input ports and one HDMI output port. The chip selects a single set of HDMI
signals from the three HDMI input ports and generates fully compliant HDMI output signals. Input port
switching is controlled by manual and automatic mechanism. I2C control is actualized through register
programming. Integrated detection and switching circuits achieve automatic control. All these control methods
take effect simultaneously. When an input port is selected, the TMDS inputs are connected to the TMDS outputs
via a 3-to-1 multiplexer, the DDC interface of the selected input port is linked to the DDC interface of the output
port, and the HPD signal of the selected input port follows the state of the HPD signal of the output port. The
unused input ports are inactive with open input terminations, disconnected TMDS inputs to the outputs, isolated
DDC channels, and the HPD outputs are kept low state.
Each TMDS channel supports signaling rates up to 3Gbps. Receiver inputs are terminated with integrated active
50Ω resistors connected to VDD33. Back termination of output port is also provided for best signal integrity.
Input equalization and output swing are programmable by registers in I2C control mode. This makes the pin
control mode offer fairly rich options. However in I2C control mode, advanced configurations can be set, more
features are accessible, and internal statuses can be read. Also two optional I2C addresses facilitate multi-chip
applications.
The device incorporates two voltage regulators to provide all necessary powers for normal operation. Together
with embedded sideband switches and internal pull-up/pull-down resistors, these components significantly
reduce board area and BOM cost. Furthermore, low power operation eliminates the need for external power
source in most applications, thereby enabling easy-to-use experience.
Features
? Compliant with HDMI1.4 specification
? Supported data rate up to 3Gbps
? Integrated terminations for all input and output
ports
? AC or DC coupling capable for both input and
output ports
? Programmable input equalization
? Input 5V power detection
? Programmable output swing
? Embedded voltage regulators for 5V to
3.3V/1.8V
? Dual control modes: pin control or I2C control
? Integrated 3-bit ADC for pin control
? Selectable I2C address
? Input switching modes: automatic and manual
? Manual input switching by I2C
? Internal DDC/HPD switching
Package
? LQFP-64 plastic (10mm×10mm)
? PB-free and RoHS compliant
Applications
? TV Mall
? Video Conference
? Security Monitoring

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