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    • 9. 发明授权
    • Semiconductor integrated circuit
    • 半导体集成电路
    • US06463006B2
    • 2002-10-08
    • US09902605
    • 2001-07-12
    • Takeshi NakanoKazunari Takahashi
    • Takeshi NakanoKazunari Takahashi
    • G11C800
    • G11C7/1057G11C7/1051G11C7/106G11C7/22G11C7/222
    • A semiconductor integrated circuit is disclosed which includes a clock synchronous memory, an internal clock generating circuit, a clock selecting circuit, a data output converting circuit, and a data output selecting circuit. The clock synchronous memory is disposed to receive a control signal, an address signal, and a data input and provide an internal data output. The internal clock generating circuit is disposed to generate an internal clock signal having a frequency higher than that of an external clock signal. The clock selecting circuit is disposed to select between the external clock signal and the internal clock signal and send the selected clock signal to the clock synchronous memory. The data output converting circuit is disposed to convert the internal data output into an external data output in synchronization with a clock signal having a frequency lower than that of the internal clock signal. The data output selecting circuit is disposed to select between the internal data output and the external data output and provide the selected data output.
    • 公开了一种半导体集成电路,其包括时钟同步存储器,内部时钟发生电路,时钟选择电路,数据输出转换电路和数据输出选择电路。 时钟同步存储器被设置为接收控制信号,地址信号和数据输入并提供内部数据输出。 内部时钟发生电路被设置为产生具有高于外部时钟信号的频率的内部时钟信号。 时钟选择电路被设置为在外部时钟信号和内部时钟信号之间进行选择,并将选择的时钟信号发送到时钟同步存储器。 数据输出转换电路被设置成与具有低于内部时钟信号的频率的时钟信号同步地将内部数据输出转换成外部数据输出。 数据输出选择电路被设置为在内部数据输出和外部数据输出之间进行选择,并提供所选择的数据输出。