Part 1 Introduction
SecureCRT connection with the recent serial port, because it is a notebook with a USB to serial port, good times appear to install the driver OK, connected, but no serial port, you can not control the problem; it is not clear is the driving issue USB serial port, or adapter the problem with serial small board, anyway, is do not fly, do not know when to handle; it is a little test to see master serial image based on previous online search-related data compilation critical information below, for your rapid detection of whether the driver has been OK a; convenient troubleshooting;
Part 2 serial ports
2.1 Serial number of needles
FIG follows, numbering from 1, 1-9;
2.2 Each serial port pin description
A carrier detect (DCD)
2 receive data (RXD)
3 issues a data (TXD)
4 Data Terminal Ready (DTR)
5 Signal Ground (SG)
6 Data Set Ready (DSR)
7 Request to Send (RTS)
8 Clear to Send (CTS)
9 Ring Indicate (RI)
Part 3 test
The experts say, the second and third connecting two pins, then the test key, can verify whether the drive ok, as follows:
3.1 install the appropriate driver COM
Automatic identification installation or to change the USB serial manufacturers official website to download;
3.2 Device Manager find the corresponding number COM
Right-click My Computer - Manage (G) - System Tools - Device Manager, see COM and FTL;
Even USB 3.3 serial number and the serial port connection open SecureCRT
Part2 communication device using the metal pins 2 and 3, and then press the keyboard of the terminal there will SecureCRT echo , echo if it can, the driving it has been able to work properly, congratulations. . .
Part 4 25-pin adapter
Reference Links: http://www.51hei.com/chip/456.html
The 25-pin serial cable to a serial port to a 9-pin serial port, PC end of the 9 pin female connector :
Connected to the serial device is a 25-pin male plug:
| 25-pin to 9-pin serial cable signal definition |
|
|
9-Pin |
25-Pin |
|---|---|---|
| Carrier Detect |
1 |
8 |
| Receive Data |
2 |
3 |
| transmit Data |
3 |
2 |
| Data Terminal Ready |
4 |
20 |
| System Ground |
5 |
7 |
| Data Set Ready |
6 |
6 |
| Request to Send |
7 |
4 |
| Clear to Send |
8 |
5 |
| Ring Indicator |
9 |
22 |
Reproduced in: https: //www.cnblogs.com/QuLory/p/3304680.html