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PC 串行口定义 |
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作者： Administrator
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2007-11-14 |
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PC 串行口定义，包括外观图、管教定义。 作者：无锡和佳 PC/AT 机上的串行口是 9 针公插座，引脚定义为： 
PC/AT 机上的串行口是 9 针母插座，引脚定义为： 
Pin | Name | Dir | Description |
|---|
1 | CD | 
| Carrier Detect | 2 | RXD |
| Receive Data | 3 | TXD | 
| Transmit Data | 4 | DTR |
| Data Terminal Ready | 5 | GND | 
| System Ground | 6 | DSR |
| Data Set Ready | 7 | RTS |
| Request to Send | 8 | CTS |
| Clear to Send | 9 | RI |
| Ring Indicator |
PC/XT 机上的串行口是 25 针公插座，引脚定义为： 
PC/XT 机上的串行口是 25 针母插座，引脚定义为： 
Pin | Name | Dir | Description |
|---|
1 | SHIELD | - | Shield Ground | 2 | TXD |
| Transmit Data | 3 | RXD |
| Receive Data | 4 | RTS |
| Request to Send | 5 | CTS |
| Clear to Send | 6 | DSR |
| Data Set Ready | 7 | GND | - | System Ground | 8 | CD |
| Carrier Detect | 9 | n/c | - | | 10 | n/c | - | | 11 | n/c | - | | 12 | n/c | - | | 13 | n/c | - | | 14 | n/c | - | | 15 | n/c | - | | 16 | n/c | - | | 17 | n/c | - | | 18 | n/c | - | | 19 | n/c | - | | 20 | DTR |
| Data Terminal Ready | 21 | n/c | - | | 22 | RI |
| Ring Indicator | 23 | n/c | - | | 24 | n/c | - | | 25 | n/c | - | |
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最近更新 ( 2007-11-18 )
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