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    • 9. 发明申请
    • Semiconductor Device and IC Card Having The Same
    • 具有相同的半导体器件和IC卡
    • US20090147862A1
    • 2009-06-11
    • US11909921
    • 2006-03-23
    • Shigeo Ohyama
    • Shigeo Ohyama
    • H04B3/00
    • H04L9/003G06K19/07363H04L2209/12
    • An IC card (1) includes: a plurality of circuit blocks (11 to 14); and an internal bus (21) which allows the circuit blocks to be connected to one another. Out of the circuit blocks, a CPU block (11) on an output side includes an encoding circuit (41) for outputting data to be transferred to a signal line (21a) of the data bus (22) after encoding the data in accordance with a predetermined encoding method so that variation of the data is evener, and a coprocessor block (12) on an input side includes a decoding circuit (42) for decoding the encoded data transferred via the signal line (21a). As a result, it is possible to realize (i) a semiconductor device which includes the plural circuit blocks and the internal signal line which allows the circuit blocks to be connected to one another but can decrease a possibility that data transferred among the circuit blocks may be estimated by power consumption analysis and (ii) an IC card having the semiconductor device.
    • IC卡(1)包括:多个电路块(11至14); 以及允许电路块彼此连接的内部总线(21)。 在电路块中,输出侧的CPU块(11)包括编码电路(41),用于根据数据总线(22)的数据编码,输出要传送到数据总线(22)的信号线(21a)的数据 一种预定的编码方法,使得数据的变化更加清晰,并且输入侧的协处理器块(12)包括用于对通过信号线(21a)传送的编码数据进行解码的解码电路(42)。 结果,可以实现(i)包括多个电路块的半导体器件和允许电路块彼此连接的内部信号线,但是可以减少在电路块之间传送的数据的可能性 通过功耗分析估计,以及(ii)具有半​​导体器件的IC卡。