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Is SPI used for long distance communication?
While the SPI communication method is generally suitable for distances up to approximately 10 m, to bridge longer distances, a repeater is often needed because of attenuation due to the increased line resistance of long cables.
What is the maximum communication speed of SPI protocol?
60 Mbps
SPI (serial peripheral interface) busses are a favorite of designers for many reasons. The SPI bus can run at high speed, transferring data at up to 60 Mbps over short distances like between chips on a board.
Which can affect long distance communication?
The low voltage signal also affects the long distance communication. But for long distance communication, the clock signal may get skewed and the low voltage can be affected by the cable capacitance. So for long distance communication RS232 can be used.
How is the SPI bus used for long distance communication?
Extending the SPI bus for long-distance communication The serial peripheral interface (SPI) bus is an unbalanced or single-ended serial interface designed for short-distance communication between integrated circuits. Typically, a master device exchanges data with one or multiple slave devices. The data exchange is full-duplex and requires syn-
Can a SPI bus be converted to RS485?
I found an interesting read from Texas Instruments here called Extending the SPI bus for long-distance communication by Thomas Kugelstadt. It sounds pretty difficult to just make it work keeping it as SPI, but they do say you can get (up to) 100m+. I would say, definitely do the SPI-to-RS485 conversion.
What should the distance be for SPI Max?
Other posts have mentioned the same figure. So your distance of 5m may or may not work since it is just a little longer. Another answer on the same forum recommends using 120- ohm terminating resistors on the lines.
How to create long-distance serial communication between…?
In order to connect two Arduino boards via the RS-485 interface, we need a special module. Typically, such modules use the popular MAX485 chip. Project schematic. Cable connection with a length of several meters. Note: In the figure above, wires A and B are straight. This will suffice if the distance is small.