Rs232 Pin Assignment

Rs232 Pin Assignment-11
RS-232 defines the meaning of the different serial signals and their respective pin assignments on a standard 25-pin (DB-25) serial connector.Table 1 (a plain text version is also available) shows these assignments.

RS-232 defines the meaning of the different serial signals and their respective pin assignments on a standard 25-pin (DB-25) serial connector.Table 1 (a plain text version is also available) shows these assignments.We will talk more about this cabling difference later.

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In fact, it's overkill for most standard communication.

However, it's good enough to have become an industry standard.

Most serial ports follow a standard called the RS-232 specification.

RS-232 is a sort of "do all" specification, and as such is not perfect in every situation.

Most systems also allow you to use soft carrier where the system pretends that the DCD signal is always asserted.

Soft carrier is often a very good thing for certain devices.RJ-45 connectors look a lot like standard telephone connectors ... They house eight wires instead of the four wires in a telephone connector.RJ-45s are not typically found on computers or normal serial equipment, but, because they are so small, they are often used on devices that have a lot of ports very close together.Terminal servers are a good example of devices that often use RJ-45 connectors.There are many wiring schemes for mapping the pins on an RJ-45 connector to a DB-25 connector.Originally, there was no standardization of the gender of connectors and serial devices.Both connectors and serial devices could be either gender.Luckily, in standard types of communications only 9 of these pins are important: 1-8, and 20.DB-25 connectors are either male, with the pins sticking out, or female, with matching holes.For instance, with a terminal, it lets you use only 3 wires for a connection: transmitted data, received data, and signal ground.However, in a modem connection, you really want to pay attention to DCD.

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