Design method of DDR4 memory card for aviation

By designing a DDR4 memory card for aviation, and using wool buttons to realize DDR4 interconnection with the processor carrier board, the problems of high design complexity of DDR circuits and low welding yield rate are solved, the design success rate and re-repair success rate are improved, and the number of product iterations and costs are reduced.

CN119720922AActive Publication Date: 2025-03-28CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Patent Information

Application Number
CN202411856175.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-03-28
Estimated Expiration
2044-12-17

AI Technical Summary

Technical Problem

In avionics, DDR circuit design has high complexity, low welding yield rate, difficulty in positioning and re-repair, resulting in low design and problem investigation efficiency, many product iterations, and high cost.

Method used

A DDR4 memory card for aviation is designed to interconnect DDR4 with the processor carrier board through wool buttons, and the DDR circuit is independently formed into a memory card. It adopts 8-layer structure wiring, uses 5 DDR4 particles, and uses Flyby routing to ensure signal integrity and timing control.

Benefits of technology

It reduces the difficulty of processor design, improves the design success rate, simplifies the design of some DDR circuits, improves the welding success rate and rework success rate, and reduces the number of product iterations and costs.

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Abstract

The invention discloses a design method of an aviation DDR4 (Double Data Rate) memory card, which comprises the following steps of: splitting a DDR (Double Data Rate) part circuit with complicated design to form a memory card, fully considering the requirements of DDR on signal integrity and time sequence during the design of the memory card, compressing the size of a sub-card as much as possible, designing the part into a typical general circuit, and decoupling from a processor, finally, the method can be used as a goods shelf product to be matched with various application scenes, the problems that in aviation product application, DDR circuit design complexity is high, the welding yield is low, failure positioning is difficult, repairing is difficult and the like are solved, the design and problem checking efficiency is effectively improved, the number of product iterations is reduced, and cost reduction and efficiency improvement are achieved.
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