The control system included the following units : video decode unit , data format conversion unit , fpga controller , cache unit and d / a monitor . the above self - design control unit plus row and column power supply units make the whole fed driving system , thus drove the 25 inch sample and realized color video display . the 25 inch vga sample thus fabricated could display video images , and obtained its brightness 400cd / m2 , contrast ratio 1000 : 1 , 256 circuit gray scale 本文介紹了fed驅(qū)動(dòng)系統(tǒng)的工作原理,重點(diǎn)論述了基于fpga的vga級(jí)彩色fed新型驅(qū)動(dòng)控制系統(tǒng)的研制,這種新型fed驅(qū)動(dòng)控制系統(tǒng)主要包括視頻解碼電路、數(shù)據(jù)格式轉(zhuǎn)換電路、 fpga控制電路、數(shù)據(jù)緩存電路和d / a監(jiān)控電路,配合后級(jí)列灰度調(diào)制單元和行掃描單元,組成完整的fed驅(qū)動(dòng)系統(tǒng),可以驅(qū)動(dòng)25英寸vga級(jí)fed顯示屏,實(shí)現(xiàn)彩色視頻顯示,樣機(jī)亮度達(dá)400cd / m2 、對(duì)比度為1000 : 1 ,灰度等級(jí)為256級(jí)。
Jx5 is a complex microprocessor , which contains cache , microcode rom , instruction prefetch unit , instruction decode unit , integer unit , mmx unit , floating point unit , page unit , bus unit , dp logic , apic and so on . it is very difficulty to test a such complicated microprocessor and receive anticipative fault coverage ratio . so , we must add dft in cpu ’ design Jx5微處理器是一款結(jié)構(gòu)異常復(fù)雜的微處理器,它的內(nèi)部包含有: cache 、微碼rom 、指令預(yù)取部件和動(dòng)態(tài)分支預(yù)測部件、指令譯碼部件、整數(shù)部件、多媒體部件、浮點(diǎn)部件、分段和分頁部件、總線接口部件、雙處理器接口部件、可編程中斷控制部件等。