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Draw pin diagram of DB9 connector, stating function of each pin.
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written 5.5 years ago by
teamques10
★ 66k
|
• modified 5.5 years ago |
| Pin No | Name | Dir | Description |
|---|---|---|---|
| 1 | DCD | IN | Data Carrier Detect. Raised by DCE when modem synchronized. |
| 2 | RD | IN | Receive Data (a.k.aRxD, Rx). Arriving data from DCE. |
| 3 | TD | OUT | Transmit Data (a.k.aTxD, Tx). Sending data from DTE. |
| 4 | DTR | OUT | Data Terminal Ready. Raised by DTE when powered on. In autoanswer mode raised only when RI arrives from DCE. |
| 5 | SGND | - | Ground |
| 6 | DSR | IN | Data Set Ready. Raised by DCE to indicate ready. |
| 7 | RTS | OUT | Request To Send. Raised by DTE when it wishes to send. Expects CTS from DCE. |
| 8 | CTS | IN | Clear To Send. Raised by DCE in response to RTS from DTE. |
| 9 | RI | IN | Ring Indicator. Set when incoming ring detected - used for autoanswer application. DTE raised DTR to answer. |
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