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  • rs232 - What is the difference between RS-232 and RS-232-C . . .
    The RS-232 Standard has gone through several revisions over the years In the original RS-232, the signal would flip between positive and negative 25 volts Since that point there have been three revisions, RS-232A, RS-232B, and RS-232C; these revisions lowered the acceptable voltage from 25 to 12 to 5 volts respectively
  • serial - Electrical Engineering Stack Exchange
    RS-232 defines two levels: 'mark' (logical 1) and 'space' (logical 0) The RS-232 to TTL converter inverts these to from the UART, so 'mark' is high at the UART and 'space' is low The UART framing state machine starts out by looking for the leading edge of the start bit, which is always a mark-to-space transition (high to low at the UART )
  • serial - Difference between UART and RS-232? - Electrical Engineering . . .
    A complete RS-232 interface will typically involve both a UART and an RS-232 level converter Further, the RS-232 standard includes the definition of several other signalling pins besides TX and RX, which you may need to use depending on the equipment you need to connect to These will also need to be level converted, and your UART may, or may
  • Serial, RS232, Modbus, UART and TCP
    RS-232 and RS-485 (and sometimes "TTL", for 0 8V 2 0+V levels) are physical implementations of a serial connection They define voltage levels for "high" and "low", and how devices are connected together A UART is the peripheral that implements a serial connection that follows the scheme described at the start
  • communication - Electrical Engineering Stack Exchange
    RS-232 is a very simple serial protocol that was originally used for modems and teletypes It is what is commonly called a serial port (or a COM port in MS-Windows) It is what is commonly called a serial port (or a COM port in MS-Windows)
  • What is the difference between Ethernet and Serial communication?
    At least three reasons, probably: In the era when RS-232 ports were common, it so by far the most common means of bit-at-a-time communication, so much so that the term "serial port" became synonymous with "RS-232 port"; using the term "serial" in connection with anything else would add confusion
  • Max Serial Cable Length? - Electrical Engineering Stack Exchange
    RS-232 is an interface protocol It is not designed for long lengths; it is designed to connect endpoints to more capable communications equipment RS-232 allows you to connect to a modem that is not on your desk, but the one next to it, even if you have to run the cable high enough that people can walk under it
  • How to read serial data from oscilloscope
    To ultimately get this data into a PC, it has to be converted to RS-232 levels This is what a PC COM port expects to see RS-232 is idle low and active high, but low is below -5V and high is above +5V Fortunately there are chips for that which make it easy to convert between typical microcontroller logic level UART signals and RS-232
  • Can I split one RS232 output signal into two signals?
    Unfortunately, my controller has only one RS232 output Can I tap another RS 232 from the existing signal cable (by stripping the cable, taking out parallel signals and all)? Or I need to use any custom hardware or cable? Ah well, that was my original question, and I did try using the circuit, the problem is I can receive data only on one terminal





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