A Serial I/O Interface Flash Memory

Abstract

The invention discloses a flash memory with a serial I / O interface, comprising: a bidirectional I / O interface and a memory cell; wherein the bidirectional I / O interface is used for receiving external clock signal and input signal, the input signal is sampled at a rising edge of the external clock signal, to obtain a first path data input result, and the input signal is sampled at a falling edge of the external clock signal, to obtain a second path data input result; the first and the second path data input results are stored in the memory cell; data in the memory cell is output. In the invention, a data transmission data of the flash memory with the serial I / O interface is raised.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a serial I / O interface flash memory. Background technique [0002] Serial interface flash memory is a widely used data storage device, but because all read and write instructions, addresses and data are serially input and output, the slow data transmission rate has become a shortcoming of serial interface flash memory. [0003] In order to increase the transmission rate, existing solutions mainly improve clock frequency and pin multiplexing. An existing solution to increase the data transmission rate of the serial interface block flash memory is: use a clock conversion circuit to sample the rising and falling edges of the external clock, and output the sampling result as an internal clock signal, thus realizing Data transfer rate at twice the external clock frequency. In addition, by combining with technologies such as port multiplexing, the data transmission rate of the serial interfac...

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Problems solved by technology

In addition, the duty cycle of the internal clock signal is different under different external clock frequencies. In some cases, the duty cycle of the generated internal clock signal is too small, which will affect the sampling of data.

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