Confusion in serial communication with USB to DB9 cable

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This topic has 1 reply, 2 voices, and was last updated 11 years, 2 months ago by AJISH ALFRED.

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February 2, 2014 at 5:23 pm #2843

Manu
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I am using USB to DB9 cable to communicate with MCU and PC in this cable RTS and CTS pin have to be used for flow control from MCU to PC or Tx, Rx and GND are sufficient for bidirectional communication.

February 4, 2014 at 8:58 am #10925

AJISH ALFRED
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Hi Ganesh,

For normal bi-directional serial communication Tx, and Rx pins are enough. Still rest of the pins can be used for options like ‘handshaking’ etc.
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