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    • 2. 发明授权
    • Card system, IC card and card reader/writer used for the card system
    • 用于卡片系统的卡片系统,IC卡和读卡器/写卡器
    • US06655588B2
    • 2003-12-02
    • US09916944
    • 2001-07-27
    • Hiroshi Fukazawa
    • Hiroshi Fukazawa
    • G06K500
    • H04L1/1867G06K7/0013G06K7/10297H04L1/0063H04L1/1692H04L1/1803
    • A card system having an IC card and a card reader/writer wherein when data is transmitted and received over a signal line between the IC card and the card reader/writer for reading or writing of the data, a data transmitting side transmits a parity based upon content of the data together with the data over the signal line and a data receiving side checks whether or not there is any error in reception of data based upon content of the a data and the parity received to transmit back to the data transmitting side a data retransmission request signal for requesting the data transmitting side to retransmit the data when there is an error; and wherein the IC card corrects a level of the signal line for requesting the data transmitting side to transmit next data when it is verified that there is no error in the reception of the data based upon content of the data and the parity received by the data receiving side.
    • 一种具有IC卡和读卡器/写入器的卡系统,其中当通过IC卡与读卡器/写卡器之间的信号线发送和接收数据以读取或写入数据时,数据发送侧发送基于奇偶校验 一旦数据内容与信号线上的数据一起,并且数据接收侧根据数据的内容和接收到的发送回数据发送侧的奇偶校验来检查数据的接收是否有错误 数据重传请求信号,用于在存在错误时请求数据发送侧重传数据; 并且其中当基于所述数据的内容和由所述数据接收到的所述奇偶校验验证所述数据的接收中没有错误时,所述IC卡校正用于请求所述数据发送侧发送下一数据的信号线的电平 接收方。
    • 6. 发明授权
    • Information processor and instruction fetch control method
    • 信息处理器和指令获取控制方法
    • US07877577B2
    • 2011-01-25
    • US12000164
    • 2007-12-10
    • Hiroshi Fukazawa
    • Hiroshi Fukazawa
    • G06F9/24
    • G06F9/3804G06F9/30058
    • In implementing an encryption algorithm or the like in a computer, it is difficult to align timing at which an instruction is executed regardless of presence or absence of branch in a case of including a conditional branch instruction. In order to solve the problem, provided is an information processor (1), including: an instruction fetch unit (instruction fetch circuit 200) that fetches an instruction code to be executed to output the fetched instruction code; and an instruction decode unit (instruction decode circuit 300) that decodes the instruction code that is output from the instruction fetch unit, in which the instruction decode unit outputs, upon detection of the instruction code being a conditional branch instruction, a control signal to the instruction fetch unit so that fetch timing of the successive instruction code becomes identical with each other regardless of the presence or absence of the branch due to the branch condition.
    • 在计算机中实现加密算法等时,无论在包含条件转移指令的情况下,是否存在分支,都难以对准执行指令的定时。 为了解决该问题,提供了一种信息处理器(1),其包括:取指令单元(指令获取电路200),其取出要执行的指令代码以输出所提取的指令代码; 以及指令解码单元(指令解码电路300),其在指示解码单元输出的指令获取单元输出的指令代码被检测到作为条件转移指令的指令代码时,将控制信号转换为 指令提取单元,使得连续指令代码的提取定时彼此相同,而不管由于分支条件是否存在分支。
    • 8. 发明申请
    • Information processor and instruction fetch control method
    • 信息处理器和指令获取控制方法
    • US20080140995A1
    • 2008-06-12
    • US12000164
    • 2007-12-10
    • Hiroshi Fukazawa
    • Hiroshi Fukazawa
    • G06F9/312
    • G06F9/3804G06F9/30058
    • In implementing an encryption algorithm or the like in a computer, it is difficult to align timing at which an instruction is executed regardless of presence or absence of branch in a case of including a conditional branch instruction. In order to solve the problem, provided is an information processor (1), including: an instruction fetch unit (instruction fetch circuit 200) that fetches an instruction code to be executed to output the fetched instruction code; and an instruction decode unit (instruction decode circuit 300) that decodes the instruction code that is output from the instruction fetch unit, in which the instruction decode unit outputs, upon detection of the instruction code being a conditional branch instruction, a control signal to the instruction fetch unit so that fetch timing of the successive instruction code becomes identical with each other regardless of the presence or absence of the branch due to the branch condition.
    • 在计算机中实现加密算法等时,无论在包含条件转移指令的情况下,是否存在分支,都难以对准执行指令的定时。 为了解决该问题,提供了一种信息处理器(1),其包括:取指令单元(指令获取电路200),其取出要执行的指令代码以输出所提取的指令代码; 以及指令解码单元(指令解码电路300),其在指示解码单元输出的指令获取单元输出的指令代码被检测到作为条件转移指令的指令代码时,将控制信号转换为 指令提取单元,使得连续指令代码的提取定时彼此相同,而不管由于分支条件是否存在分支。