EDID标准详解

EDID规范制作人：张杰2015.9.2目录EDID规范........................................................................................................................................1目录...........................................................................................................................................1一、EDID综述..............................................................................................................................2二、EDID主块详解......................................................................................................................21.EDID主块结构....................................................................................................................22.Header:..................................................................................................................................33.Vendor/ProductIdentification.............................................................................................34.EDIDStructureVersion/Revision.......................................................................................45.BasicDisplayParameters/Features.....................................................................................46.ColorCharacteristics.............................................................................................................57.EstablishedTimings..............................................................................................................58.StandardTimingIdentification..............................................................................................69.DetailedTimingDescriptions(DTD).....................................................................................610.ExtensionFlag.....................................................................................................................911.Checksum............................................................................................................................9三、EDID扩展块（CEA-861D）详解......................................................................................101.CEA-861D（HDMI）结构................................................................................................102.Tag.......................................................................................................................................103.Revision.............................................................................................................................104.数字信号特性....................................................................................................................105.DataBlocks（各功能块参数设置）...............................................................................116.DetailedTimingDescriptions(DTD)...................................................................................157.Padding（保留字节）........................................................................................................158.Checksum............................................................................................................................15一、EDID综述EDID:ExtendedDisplayIdentificationData(外部显示设备标识数据)----指DDC通讯中传输的显示设备数据。版本演变过程：Version:1.0-Version1.1-Version1.2-Version1.3-Version2.0VGA、DVI的EDID由主块128字节组成，HDMI的EDID增加扩展块(128字节)，扩展块数据规范按照CEA-861x标准定义。二、EDID主块详解1.EDID主块结构2.Header:在EDID的开头八个字节为EDID的开始标志，简称头，固定为：00H01H02H03H04H05H06H07H00FFFFFFFFFFFF003.Vendor/ProductIdentification这十个字节表示产品ID和制造商信息。详细如下：08H09H0AH0BH0CH0DH0EH0FH10H11H制造商名称产品代码产品序列号制造周制造年份制造商名称：3个字母组成，基于压缩的ASCII码见下表，例如“00001=A”……”11010=Z”。这两字节排列如下：地址位bit1bit2bit3bit4bit5bit6bit7bit808H-（43210）（43字符1字符209H210）（43210）字符2字符3产品代码：固定为4位16进制数，即两个字节，为客户提供，直接填写。产品序列号：即产品的流水号（数值型），直接转成16进制或以ASCII格式转换。序列号也可用字符型，在后面DTD部分定义。生产周：即在当年中的生产周，范围1~52，注意0为无效值。生产年份：规定1990开始计算，即1990年为0，然后递增计算。ABCDEFGHIJKLM00001000100001100100001010011000111010000100101010010110110001101NOPQRSTUVWXYZ011100111110000100011001010011101001010110110101111100011001110104.EDIDStructureVersion/Revision字节EDID版本及修改备注1（12H）版本号1（13H）修改号5.BasicDisplayParameters/Features5字节基本的显示参数/特征14H1视频信号定义见下表15H1最大水平图像尺寸cm16H1最大垂直图像尺寸cm17H1显示传输特性（Gamma）(gammax100)-100,[1.00→3.55]18H1电源管理标准（DPMS）见下表字节位类型详细描述14H7模拟/数字信号模拟=0,数字=1如bit7=0,即模拟信号，bit6~0定义如下：6信号电平[6:5]参阅下列定义。Bit6Bit5Operation000.700,0.300(1.000Vp-p)010.714,0.286(1.000Vp-p)101.000,0.400(1.400Vp-p)110.700,0.000(0.700Vp-p)54setup一般为03同步输入支持[3]如果设置1,支持同步分离信号；2同步输入支持[2]如果设置1,支持同步复合信号（在水平同步行信号上）；1同步输入支持[1]如果设置1,支持同步SOG信号；0同步输入支持[0]如果设置1,场同步扫描起点，脉冲须在复合同步信号或同步SOG信号被使用；如bit7=1,即模拟信号，bit6~0定义如下：6-1保留0DFP1.xIfset=1,InterfaceissignalcompatiblewithVESADFP1.xTMDSCRGB,1pixel/clock,upto8bits/colorMSBaligned,DEactivehigh字节位特点支持详细描述18H7Standby待机是否支持Standby功能6Suspend挂起是否支持Suspend功能5ActiveOff/VeryLowPower是否支持OffMode功能[4:3]显示类型[4:3]Bit4Bit3解释00黑白/灰度显示01RGB颜色显示10非RGB多彩色显示，如RGY11没有定义2标准默认颜色空间sRGB如果置1，显示将使用默认的颜色空间sRGB作为基色1推荐分辨率模式如果置1，推荐分辨率为第一个详细描述的时序（DTD）0支持GTF如果置1，支持GTF标准分辨率6.ColorCharacteristics字节颜色特征基于CIE出版15.2测定空间19HRed/GreenLowBits红绿场xy坐标低2位值Rx1Rx0Ry1Ry0Gx1Gx0Gy1Gy01AHBlue/WhiteLowBi