In the world there are a huge number of connectors, slots, interfaces. It is almost impossible for a simple user to identify them and know everything. When a beginner decides to build a personal computer on his own, many questions arise regarding compatibility. Today we will find out what RS-232 interfaces are.
The concept
If you are faced with the fact that you do not know what kind of connector it is and what it is for, then we will figure it out later. This standard refers to the physical layer and was developed as a "companion" to the asynchronous interface. Most often, referring to RS-232, experts mention the serial port of a PC.
, . . , . , RS-232 USB.
, . , , . , , .
, , 1962 . , « 232». RS-232.
5 8 . +25 -25 . , . : . , .
. RS-232C , . DB25 25 . « », .
1983 . UART. 4 , COM-.
. , . 1986 RS EIA. , . RS-232.
, , – . 15 , 115200 . , . , . .
, RS-232 . - , «». - USB. , , . , RS-232.
, . , RS-232 . . , , . , .
, . . , . .
, «» , «» – . , «». RS-232 , , .
, D, 25 . . . , , , , , ..
, , – . , . RS-232 .
TXD, , . , .
RTS . , . . , .
RS-232, , . , – . , , , . , , .
, RS-232/422/485 COM-. , . , , .
. , , – . , , .
, . , , .
, RS-232 (etherne ), . , , . , .
– , , , . , . «» , «» .
RS-232 RS-485/422, , . , , 10 / . . , «» /.