A. PIN 2- 3 : Received and transmit.
B. PIN 7- 8 : Request to Send and Clear to Send.
C. PIN 1.4.6 : Data Carrie Detect, Data Terminal Ready and Data Set Ready.
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How to make COM RS-232 Loopback test device
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For easy to test RS-232 function
1. COM Port D-Sub 9 Pin define:
2. Please following pin need to be connected together as below:
A. PIN 2- 3 : Received and transmit.
B. PIN 7- 8 : Request to Send and Clear to Send.
C. PIN 1.4.6 : Data Carrie Detect, Data Terminal Ready and Data Set Ready.
3. Into Burn-In test Program, choose COM port number and speed to verify it.
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