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Programming apparatus and programming method for EFUSE

A technology for writing devices and writing signals, applied in software deployment and other directions, can solve the problems of lack of precise control between operations, waste of chip pin resources, and insecurity, saving software instructions, improving efficiency, accuracy, and safety. high sex effect

Active Publication Date: 2018-08-24
AMICRO SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, using software for programming does not need to map the programming port of EFUSE to an external pin, which reduces the occupation of pin resources, but the operation of programming with software cannot be accurately controlled, resulting in The probability of failure of EFUSE programming operation increases
In the existing technical field, using the external pin programming method is easy to operate and realizes precise control of the programming time, but it is not safe to waste chip pin resources due to the occupation of pin resources.

Method used

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  • Programming apparatus and programming method for EFUSE
  • Programming apparatus and programming method for EFUSE

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention. It should be understood that the specific embodiments described below are only used to explain the present invention, not to limit the present invention.

[0029] In the implementation of the present invention, only the case of using EFUSE is discussed. When the IC uses EFUSE to realize the query CHIPID, encryption and decryption functions, there is a special function module to generate the programming logic device of EFUSE. When programming, EFUSE uses high voltage for programming. This high voltage can be generated in a variety of ways. If this high-voltage power supply is mapped to an external pin, this pin must be a dedicated high-voltage pin and cannot be multiplexed with ordinary IO function pins. If the high voltage does not come from the high voltage pin outside the IC, but is boosted...

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Abstract

The invention relates to a programming apparatus and a programming method for an EFUSE. According to the programming apparatus, a reliable programming mode which does not have requirements on pin resources, is secure and reliable and can meet an accurate timing requirement is designed based on the programming method to finish programming of the EFUSE. A synchronous enable logic module in the apparatus synchronously enables programming signal counting logic modules to count programming signals with accurate output pulse widths under the driving of an accurate clock signal of an external crystaloscillator, and corresponding flag signals are removed to finish programming of required EFUSE bit; and accurate timing can be realized without starting a timing apparatus module by software, so thatsoftware instructions are reduced and the instruction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of integrated devices, in particular to an EFUSE programming device and programming method. Background technique [0002] The Efuse (electrically programmable fuse) module is usually an ip (intellectual property) provided by the chip manufacturer. It is a non-volatile memory. The characteristic of the Efuse module is that the bits stored in the default value are all 0, which can be programmed to The required bit is changed from 0 to 1. Once it is changed to 1, it can no longer be changed to 0, but the bit that has not been changed to 0 can also be changed to 1 by programming. The Efuse module is usually used to store the repair information of some chip internal ram (random access memory), which is used to improve the yield rate of the chip. Therefore, the Efuse module is usually programmed once during the chip mass production test stage. In addition, some very important and sensitive information will be st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F8/61
CPCG06F8/63Y02D10/00
Inventor 何再生
Owner AMICRO SEMICON CORP