A Single Event Hardened Programmable User Register Circuit

Abstract

The invention relates to a single-particle reinforced programmable user register circuit. Single-particle reinforcement design of a user register is realized by adopting a circuit having a dual-redundant interlocking structure in the traditional latch; on the basis, a multi-mode programmable control switch is additionally provided, such that the user register can be switched among multiple working modes; a multi-power and multi-mode controller circuit is adopted; a user logic power supply is used in a data path; and a multi-mode switching control power supply is used on a programmable switch, such that time sequence influence generated by the single-particle reinforcement design of the dual-redundant interlocking structure and the programmable switch can be completely eliminated. Compared with the traditional register, the single-particle reinforcement index in the invention is increased by three orders of magnitude; furthermore, programmable functions, such as an edge trigger, a level latch, synchronous / asynchronous setting / resetting and data retention, can be realized; and thus, users have relatively high flexibility, better time sequence performance and ultra-high single-particle reinforcement resistant index while using the programmable user register.

Description

technical field [0001] The invention relates to a single-particle reinforced programmable user register circuit, in particular to a programmable single-particle reinforced register circuit optimized for application requirements of programmable logic devices, belonging to the field of integrated circuits. Background technique [0002] Programmable logic devices have the advantages of high flexibility, low cost and short cycle, which can greatly shorten the product development cycle and minimize risks, and have become the core components in the integrated circuit industry. The programmable user register is the core circuit in the programmable logic device that realizes the user's sequential logic function, which can be programmed to realize various sequential functions according to the user's needs. [0003] On the other hand, due to the influence of the space single event effect, the data in the programmable user register will be single-event flipped, resulting in user storag...

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Problems solved by technology

[0003] On the other hand, due to the influence of the spatial single event effect, the data in the programmable user register will be single-event flipped, causing errors in user stored data. If the programmable user register with single-event flipping is used as a key state machine, it will Make this user function interrupt

[0004] Traditional single-event hardening methods use dual-mode redundancy, triple-mode redundancy, etc. to harden memories and flip-flops, but have limited hardening capabilities for programmable logic devices

At the same time, these programmable user registers need to be able to work at very high frequencies, and their setup / hold times need to be strictly designed

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