Signal count delay method and circuit in chip electrifying process

Abstract

The invention relates to the field of the reliability of chips, in particular to a signal count delay method in a chip electrifying process. The method increases the reliability of circuit count delay time by improving a conventional chip electrifying delay count circuit. The method is specifically implemented by the following steps of: delaying a plurality of signals by using a counter in the chip electrifying process; extracting marks of a plurality of count values from the count values of a delay counter; stopping counting by using the counter only when the extracted mark values are counted by using the counter; and generating a delayed signal after the counter stops. By adopting the method, the guarantee of the count values of the delay counter when the chip is electrified abnormally can be increased, and the reliability when the chip is electrified abnormally can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of chip reliability, and in particular relates to the reliability of the chip when it is powered on and off in an abnormal way. Background technique [0002] With the development of information technology, electronic products play an increasingly important role in people's daily life. The reliability of these electronic products has become a matter of great concern to people. The reliability comprehensively reflects the characteristics of a product's durability, trouble-free performance, effectiveness and economical use, and is an important quality index of a product. As an important part of electronic products carried by individuals, chips have been used in more and more aspects of people's lives unconsciously. The wide application of chips makes their reliability a great concern. [0003] In the application of the chip, there are some harsh application environments or irregular operations, and some abnormal power-...

AI Technical Summary

Problems solved by technology

The simple counter delay in the above scheme has certain problems when powering on and off abnormally, as described below: When the chip is powered on abnormally, the voltage of the internal standard unit has not reached the normal working voltage value at the end of power-on, but at this time The counter has started to work, and the abnormal working voltage will cause the counter to work abnormally, causing the counter to not fill all the counting values ​​and soon reach the end of counting, so that the internal voltage of the chip has not yet reached the normal working voltage value when the chip starts working, which is too low The voltage of the CPU makes the execution of the CPU disorder and has a destructive effect on the chip

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