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What are the cheapest microcontrollers with CAN Bus available?

Former Member

I am designing a sensor's network and I decided to use CAN because of the noisy environment and the long distance ( over 50 meters). I need to design a small board that should be connected to both sensors (using SPI,I2C or ADC) and data acquisition board (through CAN Bus).  That's why I'm looking for the cheapest micro-controller to improve the solution cost effectiveness.  Thanks for every one how can help me.

  • The basic CAN spec doesn't even specify the physical layer of the network, even using the low speed fault tolerant phyisical layer which is common in automotive applications, is not especially noise immune. CAN's real strengths are in other areas which may or may not be important to you. CAN gets rather slow over long distances. How many sensors will your network support, how will you assign  their network IDs, what data rates must you support. When you can answer those questions you are ready to start thinking about the processor. It is very unusual that the cheapest processor results in the lowest total system cost. Unless you are going to build a lot of nodes it is likely that the cost of the processor is not very significant. If you could provide some more detail about your project I might be able to make some more specific suggestions.

     

    MK