Spi extension circuit
By combining the main control module and the chip select switch module, the problem of the lack of SPI channel in the SOC is solved, realizing a high-efficiency SPI expansion circuit, reducing costs, optimizing signal transmission and simplifying wiring.
CN224536508UActive Publication Date: 2026-07-21BEI DOU ZHI LIAN KE JI YOU XIAN GONG SI +1
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEI DOU ZHI LIAN KE JI YOU XIAN GONG SI
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
The lack of redundant SPI channels in existing SoCs leads to the need for multiple SPI switching switches, which increases costs, affects waveform quality, and increases the difficulty of PCB layout.
Method used
By combining a main control module and a chip select switch module, the chip select signal of the electronic device is centrally managed through the chip select switch module. The main control module and the chip select switch module are connected in a single way, avoiding the direct integration of multiple SPI switches and optimizing the signal transmission path.
Benefits of technology
Reduce hardware costs, improve SPI waveform quality and stability, simplify PCB routing, and reduce the risk of signal interference.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224536508U_ABST
Abstract
The utility model relates to the technical field of communication technology especially, a kind of SPI extension circuit, including main control module, main control module is provided with SPI interface and signal transmitting end, SPI interface is connected with each slave device signal transmission;Chip select switch module, chip select switch module is connected with signal transmitting end signal transmission, chip select switch module is connected with each slave device signal transmission.This scheme is by using chip select switch module centralized management electronic equipment's chip select signal, responsible for the chip select signal distribution and switching of each electronic equipment, avoid the demand of directly integrating multiple SPI switching switch on main control module, to reduce hardware cost;By setting chip select switch module can optimize signal transmission path, reduce the influence of parasitic capacitance to signal integrity;Chip select switch module integrates multiple signals, reduces the connection quantity between main control module and each electronic equipment, so that PCB wiring is more simple, reduces wiring difficulty and the risk of signal interference.
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