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Transmission method for serial circumference interface serial type flash memory

A transmission method and interface technology, which can be used in instruments, electrical digital data processing, etc., and can solve problems such as limitations

Active Publication Date: 2009-12-23
ELITE SEMICON MEMORY TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only double the data output rate, while other operations are still limited by the clock frequency

Method used

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  • Transmission method for serial circumference interface serial type flash memory
  • Transmission method for serial circumference interface serial type flash memory
  • Transmission method for serial circumference interface serial type flash memory

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0029] image 3 It is a transmission sequence diagram of an embodiment of the present invention, which includes operations such as reading, programming, and erasing. The first system clock signal XSCK with the first frequency is provided by an external clock circuit, the second system clock signal sck2 with the second frequency is generated by doubling the first frequency, and then multiple data strings can be transmitted , and transmit one bit of data in the data string within one period of the second system clock signal sck2. exist image 3 , the data string contains three parts: the first part of the data string contains the read command transmitted in the first phase (Phase 1) and the read address transmitted in the second phase (Phase 2); the second part of the data The string contains the programming command transmitted in the first phase (Phase 1), the programming address transmitted in the second phase (Phase 2), and the programming data transmitted in the third phas...

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Abstract

The invention discloses a transmission method of serial peripheral interface (SPI) serial flash, which comprises providing a first system clock signal and transmitting one two-bit data of a plurality of data series in one prior of the first system clock signal, while the invention doubles the first system clock signal to generate a second system clock signal to improve the transmission speed of all input or output of the serial peripheral interface (SPI) serial flash.

Description

technical field [0001] The present invention relates to a serial peripheral interface (SPI) serial flash memory transmission method, in particular to a serial peripheral interface (SPI) serial flash memory transmission method utilizing double data rate (DDR). Background technique [0002] Press, the general parallel flash memory (Parallel Flash) usually has a lot of pins (more than 20) for inputting and outputting data, receiving power signal, receiving address signal and receiving control signal. However, some of the pins are not used during operation. When parallel flash memory is used on a printed circuit board (PCB) or the like, there are usually disadvantages such as occupying too much area on the printed circuit board, increasing system cost, and complicating the control circuit. In order to facilitate the design of printed circuit boards and reduce costs, a serial flash memory (Serial Flash) has been developed. [0003] figure 1 The function of each pin of the gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/42
Inventor 陈宗仁
Owner ELITE SEMICON MEMORY TECH INC