利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

11 条记录 (耗时 0.014 秒)

    Microcomputer having built-in nonvolatile memory and check system thereof
    4.
    发明公开
    Microcomputer having built-in nonvolatile memory and check system thereof 审中-公开
    Mikrorechner mit eingebautem Festspeicher undPrüfsystem

    公开(公告)号：EP1050816A2

    公开(公告)日：2000-11-08

    申请号：EP00303065.7

    申请日：2000-04-12

    申请人： Sharp Kabushiki Kaisha ,  Nippon Telegraph and Telephone Corporation

    发明人： Shigemasa, Haruhiko ,  Yaegawa, Kazuhiro ,  Tanno, Masaaki ,  Shimoyama, Nobuhiro ,  Takeda, Tadao

    IPC分类号： G06F11/22 ,  G11C29/00

    CPC分类号： G06F11/2635 ,  G01R31/31926 ,  G06K7/0095 ,  G06K19/07 ,  G06K19/073 ,  G11C29/52

    摘要： When a built-in nonvolatile memory in a microcomputer is tested, a control program prestored in a boot ROM is run upon entering a test command from an external communication device; a test program is transferred from the external communication device to a built-in RAM through a communication circuit; a control of a CPU is switched to the built-in RAM after the test program has been transferred and a test is conducted on the nonvolatile memory; and a test result and a fail log are transferred to the external communication device through the communication circuit. Consequently, the built-in nonvolatile memory in the microcomputer can be checked without leaving the test program on the chip.

    摘要翻译： 当测试微型计算机中的内置非易失性存储器时，在从外部通信设备输入测试命令时，预先存储在引导ROM中的控制程序运行; 通过通信电路将测试程序从外部通信设备传送到内置RAM; 在传送测试程序并对非易失性存储器进行测试之后，将CPU的控制切换到内置RAM; 并且通过通信电路将测试结果和故障日志传送到外部通信设备。 因此，可以检查微型计算机中的内置非易失性存储器，而不将测试程序留在芯片上。

    Microcomputer having built-in nonvolatile memory
    6.
    发明公开
    Microcomputer having built-in nonvolatile memory 审中-公开
    微电脑内置非易失性存储器

    公开(公告)号：EP1041486A3

    公开(公告)日：2003-04-23

    申请号：EP00302643.2

    申请日：2000-03-30

    申请人： SHARP KABUSHIKI KAISHA ,  Nippon Telegraph and Telephone Corporation

    发明人： Yaegawa, Kazuhiro ,  Ogawa, Ryuichi ,  Takeda, Tadao ,  Suto, Hiroki ,  Tanno, Masaaki

    IPC分类号： G06F9/445 ,  G06F11/14

    CPC分类号： G06F9/4403

    摘要： A 1-chip microcomputer having a built-in nonvolatile memory includes at least one erasable flash memory provided in a memory space of the microcomputer, a boot ROM for storing an initial program to start up the 1-chip microcomputer and a transfer program to transfer the initial program to the flash memory, and control means for, when the flash memory stores no program, transferring the initial program to the flash memory in accordance with the transfer program and subsequently removing the boot ROM from the memory space. Consequently, even if a new program is additionally stored to the nonvolatile memory in the 1-chip microcomputer, the additional program can be carried out.

    Microcomputer having built-in nonvolatile memory
    8.
    发明公开
    Microcomputer having built-in nonvolatile memory 审中-公开
    微型计算机

    公开(公告)号：EP1041486A2

    公开(公告)日：2000-10-04

    申请号：EP00302643.2

    申请日：2000-03-30

    申请人： SHARP KABUSHIKI KAISHA ,  Nippon Telegraph and Telephone Corporation

    发明人： Yaegawa, Kazuhiro ,  Ogawa, Ryuichi ,  Takeda, Tadao ,  Suto, Hiroki ,  Tanno, Masaaki

    IPC分类号： G06F9/445

    CPC分类号： G06F9/4403

    摘要： A 1-chip microcomputer having a built-in nonvolatile memory includes at least one erasable flash memory provided in a memory space of the microcomputer, a boot ROM for storing an initial program to start up the 1-chip microcomputer and a transfer program to transfer the initial program to the flash memory, and control means for, when the flash memory stores no program, transferring the initial program to the flash memory in accordance with the transfer program and subsequently removing the boot ROM from the memory space. Consequently, even if a new program is additionally stored to the nonvolatile memory in the 1-chip microcomputer, the additional program can be carried out.

    摘要翻译： 具有内置非易失性存储器的1片微型计算机包括设置在微型计算机的存储器空间中的至少一个可擦除闪存，用于存储启动单片微机的初始程序的引导ROM和用于传送的传送程序 闪速存储器的初始程序，以及控制装置，用于当闪速存储器不存储程序时，根据传送程序将初始程序传送到闪速存储器，随后从存储器空间移除引导ROM。 因此，即使在1片微型计算机中另外存储新的程序到非易失性存储器中，也可以执行附加程序。

    Clock signal switching device of an IC card
    9.
    发明公开
    Clock signal switching device of an IC card 失效
    IC卡的时钟信号切换装置

    公开(公告)号：EP0337684A3

    公开(公告)日：1990-12-27

    申请号：EP89303478.5

    申请日：1989-04-07

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Katsutani, Masafumi ,  Yaegawa, Kazuhiro

    IPC分类号： G06K19/06 ,  G06F1/04

    CPC分类号： G06K19/07 ,  Y10T307/615 ,  Y10T307/62

    摘要： When an IC card (1) is attached to a terminal unit (30), a counter (17) counts pulses of an external clock signal and a switching circuit (20) outputs the external clock signal to an internal circuit (5) in place of an internal clock signal if a NAND gate (18) determines that the count of pulses of the external clock signal by the counter (17) is a predetermined value. When the IC card is ejected from the terminal unit, pulses of the internal clock signal are counted by a counter (7) and when the count attains a predetermined value, the counter (17) is cleared and the switching circuit outputs the internal clock signal to the internal circuit in place of the external clock signal in response to the output of the NAND gate (18). Thus, it can be correctly determined whether the IC card is operated in the form of a single body or in the form attached to any terminal unit.