Signal transmission method and system based on spi and rs485
By directly connecting the SPI chip to the RS485 transceiver, the problem of efficient long-distance data transmission between master and slave devices in the SMT industry is solved, achieving synchronous high-speed transmission and reducing system costs, making it suitable for industrial communication fields.
CN122394989APending Publication Date: 2026-07-14SHENZHEN AREED TECHNOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN AREED TECHNOGY CO LTD
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-14
Smart Images
Figure CN122394989A_ABST
Abstract
The application discloses a signal transmission method and system based on SPI and RS485, which comprises an SPI chip and an RS485 transceiver; the SPI chip is connected with a first device; a host output slave input end of the SPI chip is connected with a driver input end of the RS485 transceiver; a host input slave output end of the SPI chip is connected with a receiver output end of the RS485 transceiver; and a driver output end of the RS485 transceiver is connected with a second device. When data is transmitted, the first device controls the host output slave input end of the SPI chip to directly transmit data to the driver input end of the RS485 transceiver, and the data is output to the second device by the RS485 transceiver. The application directly connects the SPI chip with the RS485 transceiver port, omits an intermediate protocol conversion link, realizes direct fusion of the SPI high-speed characteristics and the RS485 long-distance characteristics, and has high transmission rate, no conversion delay and low cost.
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