Semiconductor integrated circuit
    3.
    发明授权
    Semiconductor integrated circuit 有权
    半导体集成电路

    公开(公告)号:US07412616B2

    公开(公告)日:2008-08-12

    申请号:US10895394

    申请日:2004-07-21

    IPC分类号: H04L7/00

    CPC分类号: G06F13/4243 G06F13/1689

    摘要: A memory interface circuit is connectable to a DDR-SDRAM which outputs read data in synchronization with a data strobe signal together with the data strobe signal. A clock generator generates internal clock signals and memory clock signals supplied to the DDR-SDRAM. The memory interface circuit determines a delay of arrival of the data strobe signal relative to the corresponding internal clock signal by using a data strobe signal inputted in a read cycle with respect to the DDR-SDRAM, samples the arrived read data, based on a signal obtained by shifting the phase of the arrived data strobe signal, and synchronizes the sampled read data to the corresponding internal clock signal on the basis of the result of determination of the arrival delay.

    摘要翻译: 存储器接口电路可连接到DDR-SDRAM,其与数据选通信号一起与数据选通信号一起输出读取数据。 时钟发生器产生提供给DDR-SDRAM的内部时钟信号和存储器时钟信号。 存储器接口电路通过使用相对于DDR-SDRAM在读周期中输入的数据选通信号,相对于相应的内部时钟信号确定数据选通信号的到达延迟,基于信号对所读取的数据进行采样 通过移位到达数据选通信号的相位来获得,并且基于到达延迟的确定结果将采样的读取数据与相应的内部时钟信号同步。

    Semiconductor integrated circuit
    4.
    发明授权
    Semiconductor integrated circuit 有权
    半导体集成电路

    公开(公告)号:US07945801B2

    公开(公告)日:2011-05-17

    申请号:US12169853

    申请日:2008-07-09

    IPC分类号: H04L7/00

    CPC分类号: G06F13/4243 G06F13/1689

    摘要: A memory interface circuit is connectable to a DDR-SDRAM which outputs read data in synchronization with a data strobe signal together with the data strobe signal. A clock generator generates internal clock signals and memory clock signals supplied to the DDR-SDRAM. The memory interface circuit determines a delay of arrival of the data strobe signal relative to the corresponding internal clock signal by using a data strobe signal inputted in a read cycle with respect to the DDR-SDRAM, samples the arrived read data, based on a signal obtained by shifting the phase of the arrived data strobe signal, and synchronizes the sampled read data to the corresponding internal clock signal on the basis of the result of determination of the arrival delay.

    摘要翻译: 存储器接口电路可连接到DDR-SDRAM,其与数据选通信号一起与数据选通信号一起输出读取数据。 时钟发生器产生提供给DDR-SDRAM的内部时钟信号和存储器时钟信号。 存储器接口电路通过使用相对于DDR-SDRAM在读周期中输入的数据选通信号,相对于相应的内部时钟信号确定数据选通信号的到达延迟,基于信号对所读取的数据进行采样 通过移位到达数据选通信号的相位来获得,并且基于到达延迟的确定结果将采样的读取数据与相应的内部时钟信号同步。

    Semiconductor device including chip with complementary I/O cells
    7.
    发明授权
    Semiconductor device including chip with complementary I/O cells 有权
    半导体器件包括具有互补I / O单元的芯片

    公开(公告)号:US08581302B2

    公开(公告)日:2013-11-12

    申请号:US13295053

    申请日:2011-11-12

    IPC分类号: H01L27/118

    摘要: Signals outputted from an I/O buffer with a parallel drive configuration are stabilized for reliability enhancement. Each I/O cell has a complementary I/O cell that outputs one output signal as a complementary signal made up of a non-inverted signal and an inverted signal. Two I/O cells are coupled in parallel. Output portions of first inverters are coupled together through a first wiring; and output portions of second inverters are coupled together through a second wiring. The first wiring is formed on the lower side of the I/O cells so that it is astride the two I/O cells, and the second wiring is formed above the first wiring so that it is astride the two I/O cells. The wirings are laid out so that the wiring length of the first wiring and the wiring length of the second wiring are substantially equal to each other.

    摘要翻译: 从具有并行驱动器配置的I / O缓冲器输出的信号稳定可靠性提高。 每个I / O单元具有互补I / O单元,其输出一个输出信号作为由非反相信号和反相信号组成的互补信号。 两个I / O单元并联耦合。 第一反相器的输出部分通过第一布线耦合在一起; 并且第二反相器的输出部分通过第二布线耦合在一起。 第一布线形成在I / O单元的下侧,使得它跨越两个I / O单元,并且第二布线形成在第一布线之上,使得它跨越两个I / O单元。 布置布线使得第一布线的布线长度和第二布线的布线长度基本相等。

    SEMICONDUCTOR DEVICE
    8.
    发明申请
    SEMICONDUCTOR DEVICE 有权
    半导体器件

    公开(公告)号:US20120126403A1

    公开(公告)日:2012-05-24

    申请号:US13295053

    申请日:2011-11-12

    IPC分类号: H01L23/498

    摘要: Signals outputted from an I/O buffer with a parallel drive configuration are stabilized for reliability enhancement. Each I/O cell has a complementary I/O cell that outputs one output signal as a complementary signal made up of a non-inverted signal and an inverted signal. Two I/O cells are coupled in parallel. Output portions of first inverters are coupled together through a first wiring; and output portions of second inverters are coupled together through a second wiring. The first wiring is formed on the lower side of the I/O cells so that it is astride the two I/O cells, and the second wiring is formed above the first wiring so that it is astride the two I/O cells. The wirings are laid out so that the wiring length of the first wiring and the wiring length of the second wiring are substantially equal to each other.

    摘要翻译: 从具有并行驱动器配置的I / O缓冲器输出的信号稳定可靠性提高。 每个I / O单元具有互补I / O单元,其输出一个输出信号作为由非反相信号和反相信号组成的互补信号。 两个I / O单元并联耦合。 第一反相器的输出部分通过第一布线耦合在一起; 并且第二反相器的输出部分通过第二布线耦合在一起。 第一布线形成在I / O单元的下侧,使得它跨越两个I / O单元,并且第二布线形成在第一布线之上,使得它跨越两个I / O单元。 布置布线使得第一布线的布线长度和第二布线的布线长度基本相等。