RS-232C(EIA-232-D/E)
Windows(MS-DOS) | COM1, COM2, COM3, ... |
Linux | /dev/ttyS0, /dev/ttyS1, /dev/ttyS2, /dev/ttyS3 |
RD [RxD] | ← | TD [TxD] |
TD [TxD] | → | RD [RxD] |
DTR | → | CTS |
CTS | ← | DTR |
RTS | → | DSR+DCD |
DSR+DCD | ← | RTS |
GND | ─ | GND |
1 | CD [DCD] | IN | Carrier Detect | キャリア検出 |
2 | RD [RxD] | IN | Received Data | 受信データ |
3 | TD [TxD] | OUT | Transmitted Data | 送信データ |
4 | DTR | OUT | Data Terminal Ready | データ端末レディ |
5 | GND | - | 信号用グランド | グランド |
6 | DSR | IN | Data Set Ready | データ設定レディ |
7 | RTS | OUT | Request to Send | 送信要求 |
8 | CTS | IN | Clear to Send | 送信可 |
9 | RI | IN | Ring Indicator | 被呼表示 |