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    • 9. 发明公开
    • SYSTEM AND METHOD TO IMPLEMENT A CROSS-BAR SWITCH OF A BROADBAND PROCESSOR
    • SYSTEM UND VERFAHREN ZUM IMPLEMENTIER EINES CROSS-BARSCHTERTER EINES BREITBANDPROZESSORS
    • EP1236090A4
    • 2002-09-04
    • EP00910150
    • 2000-02-11
    • MICROUNITY SYSTEMS ENG
    • HANSEN CRAIGBATEMAN BRUCEMOUSSOURIS JOHN
    • G06F7/76G06F9/308G06F9/30
    • G06F7/76G06F9/30018
    • The present invention provides a cross-bar circuit (100) that implements a switch (115) of a broadband processor. The cross-bar circuit (100) includes: a switch circuit (115) which includes 2 .2 :1 multiplexor circuits (202-204) where each of the 2 :1 multiplexor circuits (202-204) has a unique n-bit index input, one disable input, and a 2 -bit wide source input receives an n-bit index at the n-bit index input, a disable bit at the disable input, and the 2 -bit input source word at the 2 -bit wide source input, and decodes the n-bit index either to select and output as an output destination bit one bit from the 2 -bit input source word if the disable bit has a logic low value; a cache memory (110) that has 2 cache datapath inputs; and 2 cache index input; and a control circuit (105) that has a plurality of control inputs receives the partially decoded instruction information on the plurality of control inputs, provides a second set of the n-bit indexes for the switch circuit (115), and provides the disable bits for the switch circuit (115) where the control circuit (105) is logically coupled to the switch circuit (115) and to the cache memory (110).
    • 本发明提供了一种实现宽带处理器的开关(115)的交叉开关电路(100)。 交叉开关电路(100)包括:包括2.2:1多路复用器电路(202-204)的开关电路(115),其中2:1多路复用器电路(202-204)中的每一个具有唯一的n位索引输入 ,一个禁止输入和一个2位宽的源输入在n位索引输入处接收n位索引,在禁用输入处接收禁用位,以及在2位宽信号源处接收2位输入源字 输入,并对n位索引进行解码,以便如果禁用位具有逻辑低值,则从2位输入源字中选择并作为输出目的位输出一位; 高速缓冲存储器(110),其具有2个高速缓存数据路径输入; 和2个缓存索引输入; 并且具有多个控制输入的控制电路(105)接收关于所述多个控制输入的所述部分解码的指令信息,为所述开关电路(115)提供第二组n位索引,并将所述禁用位 对于其中控制电路(105)逻辑地耦合到开关电路(115)和高速缓冲存储器(110)的开关电路(115)。