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    • 1. 发明专利
    • Memory system
    • 空值
    • JP4082913B2
    • 2008-04-30
    • JP2002030191
    • 2002-02-07
    • 株式会社ルネサステクノロジ
    • 靖宏 中村郁夫 原茂雅 塩田啓之 後藤洋文 澁谷
    • G06F12/00G06F3/08G06F13/16G06F13/38G11C7/10
    • G06F12/0246G06F13/161G06F13/1673G06F2212/7206G11C7/1006
    • A memory system is provided which contributes to improvement in efficiency of a data process accompanying a memory access. A memory system has a rewritable nonvolatile memory, a buffer memory, and a controller. The controller controls, in response to an access request from an external apparatus, first data transfer between the controller and the external apparatus, second data transfer between the controller and the nonvolatile memory, and third data transfer between the controller and the buffer memory, controls transfer from the controller to the buffer memory in the third data transfer and transfer from the buffer memory to the controller in a time sharing manner, and enables the first data transfer or the second data transfer to be performed in parallel with the transfer carried out in the time sharing manner.
    • 本发明提供了一种有助于提高伴随存储器访问的数据处理的效率的存储器系统。 存储器系统具有可重写非易失性存储器,缓冲存储器和控制器。 控制器响应于来自外部设备的访问请求控制控制器和外部设备之间的第一数据传输,控制器和非易失性存储器之间的第二数据传输以及控制器和缓冲存储器之间的第三数据传送,控制 在第三次数据传送中从控制器传送到缓冲存储器,并以时间共享的方式从缓冲存储器传输到控制器,并且能够与第一次数据传送或第二数据传输并行执行 时间分享的方式。
    • 9. 发明专利
    • External storage device and a memory access control method thereof
    • JP3782840B2
    • 2006-06-07
    • JP17907595
    • 1995-07-14
    • 株式会社ルネサステクノロジ
    • 理之 内藤茂雅 塩田国弘 片山隆之 田村
    • G06F11/10G06F12/16G06F3/06
    • G06F11/1008
    • High speed memory access and transparent error detection and correction using a single error correcting means are obtained. A host computer writes (2N-1)th (odd-numbered) sector data in one of the first memory and second memory (e.g., constituted by one or more memories) and 2N-th (even-numbered) sector data in the other of the first and second memory. Accordingly, (2N-1)th sector data can be read out from one of the first memory and second memory to the host computer, and at the same time (i.e., simultaneously), 2N-th sector data (i.e., next sector data to be read by the host computer) can be read out from the other of the first memory and second memory and error detection and correction can be performed in the error correcting means. Also, during a next cycle, the 2N-th (even-numbered) sector data read out from one of the first memory and second memory can be outputted to the host computer, and at the same time (i.e., simultaneously), error detection and error correction of the (2N+1)th sector data (next sector data to be read by the host computer) read out from one of the first computer and second computer can be performed in the error correcting means. Consequently, the host computer always reads sector data, and at the same time, error detection and the error correction for a next sector data are simultaneously performed thereby the time required for error detection and error correction can be reduced apparently (i.e., made transparent to the host computer 2) and memory access can be obtained.