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    • 1. 发明授权
    • Data processing system with coprocessor
    • 数据处理系统与协处理器
    • US4894768A
    • 1990-01-16
    • US21007
    • 1987-03-02
    • Kazuhiko IwasakiTsuneo FunabashiIkuya KawasakiHideo InayoshiAtsushi HasegawaTakao YaginumaEiki Kondoh
    • Kazuhiko IwasakiTsuneo FunabashiIkuya KawasakiHideo InayoshiAtsushi HasegawaTakao YaginumaEiki Kondoh
    • G06F15/16G06F9/38G06F15/167
    • G06F15/167G06F9/3877
    • When a microprocessor fetches an instruction to be processed by a coprocessor, it sends to the coprocessor a command corresponding to the instruction while informing the coprocessor that the bus cycle is in the mode of transfer of the instruction to the coprocessor. In transferring an operand from the memory to the coprocessor, the microprocessor asserts, in addition to a usual memory read signal, a signal (CYCYCL) indicative of validity of the coprocessor and instructs the coprocessor to fetch data to thereby complete the operand transfer from memory to coprocessor within one bus cycle. In transferring data from the coprocessor to the memory, the microprocessor asserts, in addition to a usual memory write signal, the CYCYCL signal and instructs the coprocessor to deliver the data to thereby complete the data transfer from memory to coprocessor within one bus cycle. Thus, the signal transfer between memory and coprocessor can be completed within one bus cycle without resort to the provision of duplicate hardware in the coprocessor.
    • 当微处理器提取要由协处理器处理的指令时,它向协处理器发送与指令相对应的命令,同时通知协处理器总线周期处于向协处理器传送指令的模式。 在将操作数从存储器传送到协处理器时,除了通常的存储器读取信号之外,微处理器还断言指示协处理器的有效性的信号(&upbar&C /),并且指示协处理器提取数据从而完成操作数传送 从一个总线周期内的存储器到协处理器。 在将数据从协处理器传输到存储器时,微处理器除了通常的存储器写入信号之外,还断言&upbar&C /信号并指示协处理器传送数据,从而完成在一个总线周期内从存储器到协处理器的数据传输 。 因此,存储器和协处理器之间的信号传输可以在一个总线周期内完成,而不需要在协处理器中提供重复的硬件。
    • 7. 发明授权
    • Microprocessor system
    • 微处理器系统
    • US5193159A
    • 1993-03-09
    • US709783
    • 1991-06-03
    • Kouzi HashimotoAtsushi HasegawaIkuya KawasakiKazuhiko Iwasaki
    • Kouzi HashimotoAtsushi HasegawaIkuya KawasakiKazuhiko Iwasaki
    • G06F9/312G06F9/38
    • G06F9/30043G06F9/3877
    • When a coprocessor communicates a plurality of data items with a master processor and a memory according to a bus access cycle activated by the master processor, the coprocessor is supplied therein with information indicating a data storage position as a data transfer source or destination. The master processor and coprocessor independently monitor the number of the sequence of data transfers or the end of the sequence of data transfer operations. As a consequence, when executing a sequence of plural data transfer operations, the coprocessor need not receive a command from the master processor for each data transfer thereto. Further, it is not required for the coprocessor to indicate the end of the sequence of data transfer cycles to the master processor since the master processor can determine this on its own.
    • 当协处理器根据由主处理器激活的总线访问周期与主处理器和存储器通信多个数据项时,协处理器在其中提供指示数据存储位置作为数据传送源或目的地的信息。 主处理器和协处理器独立地监视数据传输序列的数量或数据传输操作序列的结束。 因此,当执行多个数据传送操作的序列时,协处理器不需要从主处理器接收每次数据传送的命令。 此外,协处理器不需要指示到主处理器的数据传送周期的结束,因为主处理器可以自己确定这一点。
    • 10. 发明授权
    • Data processor and single-chip microcomputer with changing clock
frequency and operating voltage
    • 数据处理器和单片机具有时钟频率和工作电压的变化
    • US5778237A
    • 1998-07-07
    • US572677
    • 1995-12-14
    • Mitsuyoshi YamamotoIkuya KawasakiHideo InayoshiSusumu NaritaMasaharu Kubo
    • Mitsuyoshi YamamotoIkuya KawasakiHideo InayoshiSusumu NaritaMasaharu Kubo
    • G06F1/32G06F1/00G06F1/18G06F1/26
    • G06F1/324G06F1/32G06F1/3296Y02B60/1217Y02B60/1285
    • A microcomputer has a clock generator capable of changing the frequency of an output clock signal: and a power circuit capable of changing the level of an operating voltage to be outputted. The frequencies of clock signals and the levels of operating voltages to be individually fed to a plurality of circuit modules can be dynamically changed according to the content of a packaged register. If the content of the register instructs the reduction of the clock signal frequency and the operating voltage in its absolute value, the operating voltage is lowered in its absolute value prior to the change in the clock signal frequency. On the contrary, if the instruction is to increase the frequency of the clock signal and the operating voltage in its absolute value, the clock signal having the increased frequency is outputted prior to the increase of the operating voltage in the absolute value. As a result, it is possible to prevent in advance the malfunctions of the circuit at the time of switching the operation frequency and the operating voltage of the circuit module.
    • 微计算机具有能够改变输出时钟信号的频率的时钟发生器和能够改变要输出的工作电压的电平的电源电路。 可以根据打包寄存器的内容来动态地改变要分别馈送到多个电路模块的时钟信号的频率和工作电压的电平。 如果寄存器的内容指示将时钟信号频率和工作电压降低到其绝对值,则在时钟信号频率变化之前,工作电压以其绝对值降低。 相反,如果指令是将时钟信号的频率和工作电压增加到绝对值,则在绝对值的工作电压增加之前输出具有增加的频率的时钟信号。 结果,可以预先切换在切换电路模块的工作频率和工作电压时电路的故障。