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Flash memory interface

A flash memory interface and serial port technology, applied in information storage, static memory, read-only memory, etc., can solve problems such as single encryption method, inflexibility, and inability to guarantee the security of source programs, and achieve the goal of enriching encryption methods and ensuring security Effect

Active Publication Date: 2008-08-20
SHANGHAI EASTSOFT MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In the existing Flash interface, only when the user chooses encryption, the input programming data and address can be encrypted at the same time through hardware encryption. The encryption method is single and inflexible; if the user does not need to encrypt the address, he cannot choose Encrypt the programming data, so that the source program in the Flash memory may be changed or erased by the user's misoperation, and the security of the source program cannot be guaranteed

Method used

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Embodiment Construction

[0021] The flash memory interface in the embodiment of the present invention can program the instruction data and / or address data in the data to be programmed separately according to the needs of the user, has multiple encryption methods, enriches the encryption methods of the data to be programmed, and realizes flexible encryption of the data to be programmed , to effectively ensure the security of data in the Flash memory.

[0022] As shown in Figure 1, it is a schematic structural diagram of the first embodiment of the flash memory interface of the present invention. The flash memory interface of this embodiment includes:

[0023] The data buffer is used to receive the clock control signal and the data to be programmed sent by the serial port. The data to be programmed includes instruction data and address data, buffers the data to be programmed, outputs the data to be programmed according to the clock control signal, and caches the data output by the Flash memory , Send th...

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Abstract

The invention discloses a flash interface, comprising: a data buffer, a first decoder, a first multi-channel selector, a first encryption module, a second multi-channel selector, a second encryption module, a judging module and a third multi-channel selector. The invention enriches the encryption ways of data to be programmed, realizes flexible encryption according to a user's requirement, and effectively guarantees the data safety of a Flash memory.

Description

technical field [0001] The invention relates to integrated circuit technology, in particular to a flash memory interface. Background technique [0002] After the 1980s, Micro Controller Unit (hereinafter referred to as: MCU, also known as: single-chip or microcontroller) technology has developed rapidly. From the development of Intel's 8051 chip to today, companies around the world have produced thousands of single-chip microcomputer products, and single-chip microcomputers are playing an increasingly important role in the social economy. [0003] At present, read-only memory and flash memory (Flash) are usually used as the memory of the single-chip microcomputer. Flash memory is also called flash memory. Among them, the read-only memory can only read the data in it and cannot write data into it when it is in use. The advantages of flexibility and faster access speed have been welcomed by the majority of design manufacturers and users. [0004] At present, many MCU desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C16/10G11C16/22G06F12/00G06F12/14
Inventor 岳卫杰陈光胜史卫东刘桂荣潘松
Owner SHANGHAI EASTSOFT MICROELECTRONICS
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