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rs232.txt
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Text File
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1989-08-09
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2KB
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25 lines
RS-232 Circuit Summary with CCITT Equivalents
| Pin | Interchange | CCITT | Description | Type | Direction|
| 1 | AA | 101 | Protective ground | gnd | n/a |
| 7 | AB | 102 | Signal or common gnd | gnd | n/a |
| 2 | BA | 103 | Transmitted data | data | To DCE |
| 3 | BB | 104 | Received data | data | From DCE |
| 4 | CA | 105 | Request to send | ctrl | To DCE |
| 5 | CB | 106 | Clear to send | ctrl | From DCE |
| 6 | CC | 107 | Data set ready | ctrl | From DCE |
| 20 | CD | 108.2 | Data terminal ready | ctrl | To DCE |
| 22 | CE | 125 | Ring indicator | ctrl | From DCE |
| 8 | CF | 109 | Rec'd line sig. detect | ctrl | From DCE |
| 21 | CG | 110 | Signal quality detect | ctrl | From DCE |
| 23 | CH | 111 | Data sig. rate sel DTE | ctrl | To DCE |
| 23 | CI | 112 | Data sig. rate sel DCE | ctrl | From DCE |
| 24 | DA | 113 | Trans sig elem timing DTE| time | To DCE |
| 15 | DB | 114 | Trans sig elem timing DCE| time | From DCE |
| 17 | DD | 115 | Rec'r sig elem timing DCE| time | From DCE |
| 14 | SBA | 118 | Secondary trans. data | data | To DCE |
| 16 | SBB | 119 | Secondary rec. data | data | From DCE |
| 19 | SCA | 120 | Secondary request to send| ctrl | To DCE |
| 13 | SCB | 121 | Secondary clear to send | ctrl | From DCE |
| 12 | SCF | 122 | Secondary RLSD | ctrl | From DCE |
Press any key when done... Press F1 for help!