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驅動系統的工作原理,重點論述了基于fpga的vga級彩色fed新型驅動控制系統的研制,這種新型fed驅動控制系統主要包括視頻解碼電路、數據格式轉換電路、 fpga控制電路、數據緩存電路和d / a監控電路,配合后級列灰度調制單元和行掃描單元,組成完整的fed驅動系統,可以驅動25英寸vga級fed顯示屏,實現彩色視頻顯示,樣機亮度達400cd / m2 、對比度為1000 : 1 ,灰度等級為256級。
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微處理器是一款結構異常復雜的微處理器,它的內部包含有: cache 、微碼rom 、指令預取部件和動態分支預測部件、指令譯碼部件、整數部件、多媒體部件、浮點部件、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。