![]() ![]() They are commonly designated as DB-9 or DB-25 with the number used to differentiate between the pin counts. The basic example of these two types of equipment defines a computer as a DTE device with a modem filling the role of DCE.įor instance, a computer (DTE) might send the binary data 11011101 serially to the modem (DCE) which then replies by sending 11010101 back to the DTE device. ![]() The formal specification of RS232 is that it is an interface which uses serial binary data exchange to communicate between DTE and DCE devices.ĭTE is the acronym for Data Terminal Equipment and DCE represents Data Communication Equipment. Db9 Serial Port Pinout Serial Binary Data The prefix RS denotes a Recommended Standard, and all of the EIA standards begin with those characters. Db9 Serial Port Pinout Serial Binary Data.
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