Burst mode type semiconductor memory device

Abstract

In a semiconductor memory device having a burst function, a memory circuit inputs and outputs information corresponding to an external input signal in synchronization with an internal clock signal. A burst operation control circuit receives an external reference clock signal and an enable signal for switching a burst operation mode and a stand-by mode, so as to suspend supplying of the external input signal in the burst operation mode and suspend generation of the first internal clock signal in the stand-by mode.

Description

technical field [0001] The present invention relates to a semiconductor memory device, and more particularly, to a semiconductor memory device having burst characteristics and suitable for operation with low power consumption. Background technique [0002] In recent years, pipelined burst static random access memory (PBSRAM) devices having a burst-like feature have played an important role in rapidly improving the performance of personal computers, where they are used as secondary cache memories. About 100% of currently used notebook type personal computers, including home personal computers, are provided with one or several PBSRAM devices. The PBSRAM device is required to operate to perform data processing at high speed and to have low power consumption especially when it is used for a notebook type personal computer. The term "burst-like feature" refers to the feature of performing a burst-like operation of fetching an external start address, then internally and automatic...

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Problems solved by technology

[0011] Even in the fourth prior art semiconductor memory device, power consumption increases

Furthermore, the power consumption increases because the device includes a comparator to find out if any change has occurred in the stored information in order to suspend the supply of the clock signal

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