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App note: Comparing serial data protocols

Posted on Saturday, September 8th, 2012 in app notes by DP

This serial digital data network table compares 8 of the most popular serial communication protocols – 1-Wire, I2C, SMBus, SPI, MicroWire, M-Bus, CAN, and LIN.

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4 Responses to “App note: Comparing serial data protocols”

  1. Alan says:

    It’s from 2005, so I can understand the lack of Thunderbolt from the list. But…

    Ethernet? USB? Firewire? JTAG ?
    Ummm… RS232 ? That’s a pretty popular serial protocol.

    • magetoo says:

      Good point. They all belong in a somewhat different category though, I can not see that one would use any of them to talk to an accelerometer, temperature sensor or D/A converter, which is presumably the sort of thing that were are talking about here.. (i.e. communication between chips in the same system)

      • Ian says:

        That’s my take too. This is most of the popular chip to chip protocols with master to multiple slave topologies. Some chips use UART, which is LIN i guess, but LIN is used in chip to chip stuff in cars sometimes so maybe that justifies it.

    • SoiSentinel says:

      Industrially, it’s mostly covered. The big one they’re missing is RS485, espeically 2 wire multidrop. I see a few categories in this list: No Transciever protocols (those built into an 8 bit micro these days); Transciever protocols (logic engine built in to micros these days, but still need an external signal converter chip), and Controller protocols (higher level protocols). A modern list of this may even include ethernet and USB these days, as that does or almost does fall into the Transciever protocols now.

      Firewire is definitely a Controller level protocol, and JTAG isn’t used for functional communication.

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