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    • 2. 发明授权
    • Method and apparatus for entering a low-power mode and controlling an
external bus of a data processing system during low-power mode
    • 用于在低功率模式下进入低功率模式和控制数据处理系统的外部总线的方法和装置
    • US5471625A
    • 1995-11-28
    • US125851
    • 1993-09-27
    • Gary A. MussemannJoseph C. CircelloJames G. Gay
    • Gary A. MussemannJoseph C. CircelloJames G. Gay
    • G06F1/32G06F13/00
    • G06F1/3203
    • A method and apparatus for placing a data processor (12) into a low-power mode of operation using a system (10). The system (10) has a processor (12). The processor (12) has access to a bus (18). The bus (18) is coupled to a bus controller (14). The processor (12) sends a broadcast cycle out through the bus (18) when the processor (12) desires to enter a low-power mode of operation. The bus controller (14) determines that the broadcast cycle has been sent on the bus (18). The bus controller (14) waits a predetermined amount of time to process the low-power request and grants permission to the processor (12) to enter the low-power mode via the communication of a transmission termination signal. The processor (12) conditionally drives either logic ones or a tri-state value onto the bus (18) depending upon whether or not the processor (12) has been granted ownership of the bus (18).
    • 一种用于使用系统(10)将数据处理器(12)置于低功率操作模式的方法和装置。 系统(10)具有处理器(12)。 处理器(12)可访问总线(18)。 总线(18)耦合到总线控制器(14)。 当处理器(12)希望进入低功率操作模式时,处理器(12)通过总线(18)发送广播周期。 总线控制器(14)确定广播周期已经在总线(18)上发送。 总线控制器(14)等待预定量的时间来处理低功率请求,并通过传输终止信号的通信向处理器(12)授予许可以进入低功率模式。 处理器(12)根据处理器(12)是否被授予总线(18)的所有权,有条件地将逻辑1或三态值驱动到总线(18)上。
    • 3. 发明授权
    • Partial-sized priority encoder circuit having look-ahead capability
    • 具有先行能力的部分大小的优先级编码器电路
    • US5265258A
    • 1993-11-23
    • US671236
    • 1991-03-19
    • Eric V. FieneGary A. Mussemann
    • Eric V. FieneGary A. Mussemann
    • G06F7/74G06F9/312G06F7/00G06F13/00
    • G06F7/74G06F9/30043
    • In an integrated circuit microprocessor, an M-bit priority encoder circuit indicates the highest priority bit position that is set in a first portion of an N-bit (N generally being greater than M) data word and provides control information regarding the number of bits that are set. If more than one bit is set, the highest priority bit is reset, the first portion is re-analyzed, and highest priority bit information and control information are again provided. If only one bit or no bit is set in the first portion, a second portion is analyzed, and highest priority bit information and control information regarding the second portion is provided. Analysis of the second portion, and of any subsequent portions, continues in similar fashion until no further bit positions are determined to be set in the data word.
    • 在集成电路微处理器中,M位优先级编码器电路指示在N位(N一般大于M)数据字的第一部分中设置的最高优先级位位置,并提供关于位数的控制信息 设置。 如果设置了多个位,则优先级最高的位被复位,第一部分被重新分析,并且再次提供最高优先级位信息和控制信息。 如果在第一部分仅设置一位或无位,则分析第二部分,并且提供关于第二部分的最高优先级位信息和控制信息。 第二部分和任何后续部分的分析以类似的方式继续,直到确定未在数据字中设置另外的位位置为止。