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One-time programmable memory chip and its control method

A memory chip, a one-time technology, applied in the direction of read-only memory, static memory, information storage, etc., can solve the problems of OTP content being stolen, OTP power-down value is easy to be changed, wrong data cannot be corrected and used, etc., to achieve The effect of improving utilization rate and ensuring reliability

Active Publication Date: 2018-11-16
SHENZHEN STATE MICRO TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above two methods of preventing OTP from being tampered with cannot prevent direct attacks on the OTP memory, OTP content is stolen, the OTP power-down value is easily changed, and after an OTP programming error occurs, the wrong data cannot be corrected and used

Method used

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  • One-time programmable memory chip and its control method
  • One-time programmable memory chip and its control method
  • One-time programmable memory chip and its control method

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Embodiment Construction

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The present invention provides a one-time programmable memory chip of an embodiment, such as figure 1 As shown, the memory chip includes:

[0030] One-time programmable memory is OTP memory 108;

[0031] The controller 101 is configured to receive or output one-time editable plaintext data, and output a first calling signal, a second calling signal and a third calling signal;

[0032] Encryption / decryption engine 102, connected to the controller 101, for reading the one-time editable plaintext data according to the first call signal, and encrypting the plaintext...

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Abstract

The invention provides a disposable programmable storage chip. The storage chip comprises a controller and a first random access memory. The controller is used for acquiring disposable editable clear data of one data block and outputting a first invoking signal, a second invoking signal and a third invoking signal. The first random access memory is connected with the controller, an encrypt / decrypt engine, a data integrity detector and a data corrector and used for storing ciphertext data with encrypted disposable editable cleartext data in each data block, and supplementing cyclic redundancy check codes and error-correcting codes. The controller is connected with the first random access memory and used for writing all data as preprogrammed data stored into the first random access memory.The first random access memory helps to improve utilization rate of the chip and ensure reliability of OTP data.

Description

technical field [0001] The invention relates to the field of security system chips, in particular to a one-time programmable memory chip and a control method for the one-time programmable memory chip. Background technique [0002] With the development of today's technology, people have noticed the importance of information security around them. Various security technologies are used in products around us such as finance, mobile phones, and the Internet. Security SOC (System on Chip, System on Chip) chips play an important role in security products, and are used in digital signature, e-commerce, mobile payment and other fields, so it is particularly important to protect the storage content of security chips, especially some The protection of memory modules storing private information, keys, etc. is even more important. [0003] Since these private information, keys, etc. are generally stored in OTP (One Time Program, one-time programming) memory, and the OTP memory itself c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/57G06F21/79G06F11/10G11C17/16G11C17/18
CPCG06F11/1012G06F21/57G06F21/79G11C17/16G11C17/18
Inventor 陶玉茂张浩王良清
Owner SHENZHEN STATE MICRO TECH CO LTD
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