USB - RS232
This is a solution to bridge the gap between today's computers and traditional devices.
A DB~9 to DB~25 adapter can complete the connection.
The \plug~and~play\ or \hot connection\ allows the adapter to be plugged in and removed without restarting the computer.
A USB
USB
The USB bus is also said to \Hot pluggable\, that is to say that you can connect and disconnect a USB with the PC on. The system installed on the PC (Windows, linux...) recognizes it immediately.
The USB has a very interesting feature : it's the mode standby when not using the device. Also known as \Power conservation\ :
Indeed the USB bus gets suspended after 3 ms if it is no longer used. During this mode, the co
RS232
For a serial line information arrive at regular intervals (synchronous) or at random intervals (asynchronous).
Between a transmitter (DTE) and a receiver (DCE) wiring is right. RS232 cables can be connected in series.
In configurations where 2 DTE are directly connected, a cable of cross linking or \Null-Modem\ should be used. This cable has female connectors at each end.
USB
The USB bus is also said to \Hot pluggable\, that is to say that you can connect and disconnect a USB with the PC on. The system installed on the PC (Windows, linux...) recognizes it immediately.
The USB has a very interesting feature : it's the mode standby when not using the device. Also known as \Power conservation\ :
Indeed the USB bus gets suspended after 3 ms if it is no longer used. During this mode, the coThe cable connects directly to the computer's serial device.
| USB | ---------- | RS232 |
|---|---|---|
| ████ 1 | ---------- | ████ 3
|
| ████ 2 | ---------- | ████ 2
|
| I_____I 4 | ---------- | ████ 5
|
