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    • 3. 发明专利
    • Data processor, and electronic apparatus
    • 数据处理器和电子设备
    • JP2004355163A
    • 2004-12-16
    • JP2003150031
    • 2003-05-28
    • Renesas Technology Corp株式会社ルネサステクノロジ
    • SAKAMOTO KAZUOMORINO NAOZUMIKUDO IKUO
    • G06K17/00G06F1/04G06F1/10G06F3/06G06F5/06G06F15/78
    • G06F5/06G06F1/10
    • PROBLEM TO BE SOLVED: To provide a microcomputer having a memory card interface to correctly fetch data when a card such as an MMC card is connected. SOLUTION: The microcomputer includes the interface (221) with an outer device such as the memory card (100). The interface includes an output driver (DRV) which is connected to an outer terminal (241) for outputting a clock signal, so as to output the clock signal; and an equivalence load circuit (257) for imparting delay which is equivalent to the delay due to the outer load of connection to the outer terminal, to the clock signal taken out from the arbitrary position of a clock signal route in the preceding stage of the output driver, in order to generate the clock signal for fetching data inputted from the memory card. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种具有存储卡接口的微型计算机,以在连接诸如MMC卡的卡时正确地取出数据。 解决方案:微型计算机包括具有诸如存储卡(100)的外部装置的接口(221)。 接口包括连接到外部端子(241)的输出驱动器(DRV),用于输出时钟信号,以输出时钟信号; 以及等效负载电路(257),用于将与外部端子的外部负载相关的延迟等效于从前一级的时钟信号路由的任意位置取出的时钟信号 输出驱动器,以产生用于取出从存储卡输入的数据的时钟信号。 版权所有(C)2005,JPO&NCIPI