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TI 公司的DS90C187是低功耗并串轉換器(串化器),主要用在以電池為能源的手提設備,能降低主GPU和顯示器間的RGB接口的尺寸.器件支持高達QXGA [email=2048x1536@60Hz]2048x1536@60Hz[/email]分辨率和主機和平板顯示器間的雙象素數據傳輸.185MHz時的功耗為100mW,能驅動QXGA/WQXGA顯示器,支持24位RGB和48位RGB,有三種工作模式:單象素進/單象素出(SISO),單象素進/雙象素出(SIDO)和雙象素進/雙象素出(DIDO).本文介紹了DS90C187主要特性,SISO,SIDO和DIDO功能框圖,以及SIDO模式應用電路, 平板電腦和電子書系統方框圖,C187EVK01評估模塊(EVM)主要特性,電路圖,材料清單和PCB布局圖. The DS90C187 is a Low Power Serializer for portable battery powered application that reduces the size of the RGB interface between the host GPU and the Display. The DS90C187 Serializer is designed to support dual pixel data transmission between Host and Flat Panel Display up to QXGA 2048x1536@60Hz resolutions. The transmitter converts up to 48 bits (Dual Pixel 24 bit color) of 1.8V LVCMOS data into two channels of 4 data + clock (4D+C) reduced width interface LVDS compatible data streams. DS90C187 supports 3 modes of operation. In single pixel mode in/out mode, the device can drive up to SXGA+ 1400x1050@60Hz. In this mode, the device converts one bank of 24 bit RGB data to one channel of 4D+C LVDS data stream. In single pixel in / dual pixel out mode, the device can drive up to WUXGA+ 1920x1440@60Hz. In this configuration,the device provides single-to-dual pixel conversion and converts one bank of 24 bit RGB data into two channels of 4D +C LVDS streams at half the pixel clock rate. In dual pixel in /dual pixel out mode, the device can drive up to QXGA 2048x1536@60Hz or up to QSXGA 2560x2048@30Hz. In this mode, the device converts 2 channels of 24 bit RGB data into 2 channels of 4D+C LVDS streams. For all the modes, the device supports 18bpp and 24bpp color. The DS90C187 is offered in a small 92 pin dual row QFN package and features single 1.8V supply for minimal power dissipation. DS90C187主要特性: ■ 100 mW typical power consumption at 185 MHz (SIDO mode) ■ Drives QXGA/WQXGA class displays ■ Three operating modes: — Single Pixel In / Single Pixel Out (SISO), 105 MHz max Single Pixel In / Dual Pixel Out (SIDO), 185 MHz — Dual Pixel In / Dual Pixel Out (DIDO), 105 MHz ■ Supports 24 bit RGB, 48 bit RGB ■ Optional low power mode supports 18 bit RGB, 36 bit RGB ■ Supports 3D+C, 4D+C, 6D+C, 6D+2C, 8D+C, and 8D+2C LVDS configurations ■ Compatible with FPD-Link, and FlatLink Deserializers ■ 1.8V VDDIO & Core Supply ■ Interfaces directly with 1.8V LVCMOS ■ Less than 1mW power consumption in Sleep Mode ■ Spread Spectrum Clock Compatible ■ Small 7mm x 7mm x 0.9 mm 92–pin dual row QFN package DS90C187應用: ■ Media Tablet Devices ■ eBook / Notebooks / Laptops ■ Portable Display Monitors 
圖1. DS90C187并串轉換器方框圖:單象素進/單象素出(SISO)
圖2. DS90C187并串轉換器方框圖:單象素進/雙象素出(SIDO)
圖3. DS90C187并串轉換器方框圖:雙象素進/雙象素出(DIDO) 圖4. DS90C187單象素進/雙象素出(SIDO)模式應用電路 Tablet and eBook System Diagram Texas Instruments (TI) offers a variety of semiconductor solutions for tablets and eBooks. The OMAP™ processor shown in the system diagram perfectly balances power and performance to give designers and end users an optimal multimedia solution. Also available are microprocessors from the Sitara™ ARM?Cortex?-A8 portfolio of microprocessors. In addition to processor technology, TI has invested in an extensive array of solutions for tablets and eBooks that support wireless connectivity, video, audio and power management. The selection guide on the following page is a sampling of TI devices available to streamline your design process.
圖5.平板電腦和電子書系統方框圖 C187EVK01評估模塊(EVM) The Texas Instruments C187EVK01 evaluation module (EVM) helps designers evaluate the performance of the DS90C187 Low Power 1.8V Dual Pixel FPD-Link (LVDS) Serializer. The device operates off of a single 1.8V supply and supports input pixel clocks from 50 MHz to 185 MHz (Single In Dual Out) or 25 MHz to 105 MHz (Single/Dual In Single/Dual Out). C187EVK01評估模塊(EVM)主要特性: 100 mW typical power consumption at 185 MHz (SIDO mode) Drives QXGA/WQXGA class displays Three operating modes: Single Pixel In/Single Pixel Out (SISO), 105 MHz max Single Pixel In/Dual Pixel Out (SIDO), 185 MHz Dual Pixel In / Dual Pixel Out (DIDO), 105 MHz Supports 24 bit RGB, 48 bit RGB Optional low power mode supports 18 bit RGB, 36 bit RGB Supports 3D+C, 4D+C, 6D+C, 6D+2C, 8D+C, and 8D+2C LVDS configurations Compatible with FPD-Link, and FlatLink Deserializers 1.8V VDDIO & Core Supply Less than 1mW power consumption in Sleep Mode Spread Spectrum Clock Compatible Small 7mm x 7mm x 0.9 mm 92-pin dual row QFN package
圖6. C187EVK01評估模塊(EVM)外形圖
圖7. C187EVK01評估模塊(EVM)電路圖(1)
圖8. C187EVK01評估模塊(EVM)電路圖(2)
圖9. C187EVK01評估模塊(EVM)電路圖(3) C187EVK01評估模塊(EVM)材料清單:
圖10. C187EVK01評估模塊(EVM)PCB布局圖:頂層
圖11. C187EVK01評估模塊(EVM)PCB布局圖:底層 詳情請見: 
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