RS232 Communications
The table below summarizes RS232 serial communications characteristics when you select RS232, RS232 (RTS On) or RS232 (RTS Off) as the Port Mode.
| Port Mode | Function | Characteristics |
|---|---|---|
| RS232 | Operation | Used for RS232 communications on serial ports that do not provide hardware control lines for Request to Send (RTS), Clear to Send (CTS), Data Terminal Ready (DTR) or Data Carrier Detect (DCD). |
| Interface Type | DTE | |
| Data Lines | RX, TX, GND | |
| Control Lines | None | |
| Speeds (bps) | 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 | |
| R232 (RTS On) | Operation |
Used for RS232 communications where the Request to Send (RTS) signal needs to be constantly asserted. No hardware hand shaking is required or supported when this mode is selected. |
| Interface Type | DTE | |
| Data Lines | RX, TX, GND | |
| Control Lines | RTS out (on), CTS in (ignored), ·DCD in (ignored) | |
| Speeds (bps) | 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 | |
| RS232 (RTS Off) | Operation |
Used for RS232 communications where the Request to Send (RTS) signal needs to be constantly deasserted. No hardware handshaking is required or supported when this mode is selected. |
| Interface Type | DTE | |
| Data Lines |
RX, TX, GND |
|
| Control Lines | RTS out (off), CTS in (ignored), ·DCD in (ignored) | |
| Speeds (bps) | 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 |