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MS9601-HDMI3进1出切换器
MS9601是一款HDMI 3进1出切换器，符合HDMI1.4标准，具有TMDS输入均衡和输出低抖
动的特点，可在单芯片解决方案中提供TMDS(每端口4通道)、DDC(SCL/SDA)和HPD的HDMI全
链路切换，简化多个HDMI输入端口应用场景下的系统级设计。
MS9601提供3路HDMI输入端口和1路HDMI输出端口。芯片从3路输入信号中选择1路，产
生全兼容HDMI信号输出。输入信号切换机制有手动和自动两种：手动切换通过I2C指令读写寄
存器实现，自动切换通过芯片内部集成的检测及切换电路实现，两种机制可同时有效。当某1路
输入信号被选择输出后，该路的TMDS输入通过3选1多路复用器连接到输出端口的TMDS通道，
所选输入端口的DDC接口连接到输出端口的DDC接口，所选输入端口的HPD信号状态与输出端
口HPD信号状态保持一致。未使用的输入端口TMDS输入与TMDS输出断接，DDC通道隔离以及
HPD输出保持低电平
每个TMDS通道信号支持高达3Gbps的速率。HDMI接收器终端集成50Ω上拉电阻（上拉至
电源VDD33），同时输出端口的反向端接也保证了信号的完整性。可以通过I2C接口对寄存器进
行编程来调整输入均衡器参数及输出驱动能力。在I2C控制模式下，可以设置高级配置，使用更
多系统功能，并读取芯片内部状态。此外，两个可选的I2C地址便于多芯片应用。
MS9601内部集成两个稳压器，为芯片正常运行提供所有必要的电源，连同内置边带开关和
内部上拉/下拉电阻，可显著减少电路板面积和BOM成本。同时，低功耗运行消除了大多数应用
中对外部电源的依赖，提高了使用的便利性。
2. 功能特征
符合HDMI1.4版本规范
支持的数据速率高达3Gbps
所有输入和输出端口集成终端匹配
输入和输出端口都支持AC或DC耦合
可编程输入均衡器
输入5V电源检测
可编程输出驱动
内置5V ~ 3.3V/1.8V稳压器
引脚控制或I2C控制模式
集成3位ADC用于引脚控制
可选的I2C地址
输入切换模式:自动和手动
通过I2C进行手动输入切换
DDC/HPD内部切换
封装
LQFP-64 (10mm×10mm)封装
无铅、符合RoHS要求
3. 应用场景
电视购物
视频会议
安防监控
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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