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Nonvolatile static RAM memory unit

A static random access and non-volatile storage technology, which is applied in the direction of static memory, digital memory information, information storage, etc., can solve the problems of unable to maintain data continuously, data loss, etc., achieve fast storage and reading of data, reduce The effect of power consumption

Inactive Publication Date: 2006-12-27
BRILLIANCE SEMICON
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, due to the characteristic of random access memory that it cannot keep data continuously, the existing technology proposes a non-volatile static random access memory (Non-volatile SRAM, nvSRAM) to solve the inherent limitations of RAM and expand the application of RAM
Because some handheld or portable digital products use batteries as their power source, once the battery cannot supply power continuously or the replacement power supply cannot be replaced immediately, the data stored in the memory will be lost immediately

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Embodiment Construction

[0019] For the convenience of discussion and reading, the SRAM cell (static random access unit) is used to replace the static random access memory storage unit, and the electrically erasable programmable read-only memory storage unit with storage function is replaced by EEPROM cell call. Usually, the storage function is also called non-volatile, so the EEPROM cell is further called nv cell (storage unit), where nv refers to non-volatile (Non-Volatile). The non-volatile static random access memory provided by the present invention is called nvSRAM.

[0020] Such as figure 1 As shown, the composition circuit diagram of the nvSRAM provided by the present invention includes an SRAM cell 10 that receives data in the computing environment through a bit line (Bit Line), which is a storage structure for one-bit data, which can temporarily hold the one-bit data , and at a later time, according to the execution instructions required by the central processing unit, the data is transmit...

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Abstract

The present invention is a storage unit which still has storing function after the power supply is off. It comprises a static random access unit and a nonvolatile storage unit, of which the static random access storage has random access characteristic so it can store data into nonvolatile storage unit when the power is closed and can automatically restore the data from nonvolatile storage unit to the static random access unit when the power is supplied.

Description

technical field [0001] The invention relates to a storage unit of a static random access memory, in particular to a storage unit of a nonvolatile static random access memory. Background technique [0002] In the operation of digital systems, it is often necessary to continuously read and store digital data. Therefore, storage elements with storage functions are important components for realizing digital systems, and can be divided into several categories: random access memory (Random Access Memory), serial access Storage (Serial Access Memory), content access storage (Content Access Memory). [0003] In semiconductor memory, an array of cells is usually used, and each cell can store one bit of data. When needed, data can be stored in or taken out from each storage unit at will, so this kind of memory is also called random access memory (Random Access Memory, RAM), which is different from read-only memory (Read Only Memory, ROM). ). The main advantage of RAM is that the ac...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/11G11C11/34H10B10/00
Inventor 廖修汉杨鸿铭
Owner BRILLIANCE SEMICON