A method to realize data is reliably written into the chip
A data writing and data technology, which is applied in the direction of data error detection, electrical digital data processing, and response error generation, can solve the problems of charge escape, chip data failure, and target area writing operation failure. Reliability and other issues to achieve the effect of reducing the actual number of times and improving efficiency
Active Publication Date: 2020-09-08
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +1
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However, after the data submission is completed, the mirror flag needs to be erased. If the falling edge of the power failure spans the two operations, that is, the power failure occurs in the last few microseconds of the data submission, resulting in the unreliable completion of the writing operation of the target area, and the clearing The operation of the mirror image flag is also completed in the next few microseconds. In the case of undervoltage in the subsequent operation, the written charge may escape and cause the chip data to become invalid. Even if the power is turned on again, because the mirror image flag is cleared, it cannot restore data
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[0024] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0025] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0026]In order to solve the problem that the data written into the chip may be confused or the chip data is unreliably written due to a power-down event, the present invention provides a method for realizing data being reliably written into the chip, which uses a RAM memory to implement The RAM buffer of the RAM buffers the data to be written into the target area of the chip at the first level, and uses the mirror buffer ...
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The invention discloses a method for reliably writing data to a chip. The method comprises the following steps of: setting a write protection flag bit, writing data into a RAM buffer, and clearing thewrite protection flag if the write operation is completed; committing data written to the RAM buffer to the mirror buffer; asserting a mirror buffer protection flag writes data of the mirror buffer to a destination area having one or more destination addresses. The method for reliably writing data into a chip according to the invention can avoid unreliable data written into the chip when accidental power-down occurs.
Description
technical field [0001] The invention relates to the field of chip design, in particular to a method for realizing reliable writing of data into a chip. Background technique [0002] Handling unexpected power-off events is one of the important functions of the chip data read and write mechanism. The user of the chip may not understand the operating specifications of the card. A user uses the electric card to recharge the meter and pulls out the electric card after waiting for two seconds. If the card is being written to the storage area at the moment of pulling out, then In the case of an unexpected power failure of the card, half of the business data may be written successfully while the rest of the data is still old data, resulting in confusion of the business data. Therefore, based on the above problems, it is necessary to set up a reliable data read and write protection mechanism to ensure that business data avoids confusion when unexpected power failure occurs. Most of...
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IPC IPC(8): G06F12/0811G06F12/0877G06F11/14
CPCG06F11/1446G06F12/0811G06F12/0877
Inventor 徐平江赵东艳袁艳芳付青琴李琨胡静敏江海朋刘永富
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY