公开(公告)号：USH2186H

公开(公告)日：2007-04-03

申请号：US6124905

申请日：2005-02-18

Applicant: GENESIS MICROCHIP INC

Inventor： NOORBAKHSH ALI ,  KEENE DAVID ,  LATTANZI JOHN ,  CHILUKURI RAM

IPC: G09G5/00

CPC classification number: G09G5/006 ,  G09G2330/02 ,  G09G2370/047

Abstract: A video controller having a processor for processing executable instructions and associated data and a number of data ports, a method of acquiring extended display identification data (EDID) by a requesting one of the data ports is described. When on-board power supply is activated, an off-board power supply is deactivated and then the now active on-board power supply provides power to a memory device used to store the EDID and the executable instructions and associated data and to an on-board clock circuit capable of providing a high frequency clock signal. The on-board clock circuit, in turn, provides the high frequency clock signal from the on-board clock circuit to the memory device and if a memory read operation had been in progress when the on-board power supply was activated, then the memory read operation is completed.

Abstract translation: 一种具有处理器的视频控制器，用于处理可执行指令和相关数据以及多个数据端口，描述了通过请求数据端口获取扩展显示标识数据（EDID）的方法。 当机载电源被激活时，非机载电源被禁用，然后现在有效的板载电源为用于存储EDID和可执行指令和相关数据的存储设备提供电力， 板时钟电路能够提供高频时钟信号。 板载时钟电路又提供从板载时钟电路到存储器件的高频时钟信号，并且如果在板上电源被激活时存储器读取操作已经进行，则存储器 读操作完成。