串口針腳定義有9針和25針:
25針串口定義
9針串口接線(xiàn)圖
9針RS-232串口(DB9) |
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25針RS-232串口(DB25) | ||||
引腳 |
簡(jiǎn)寫(xiě) |
功能說(shuō)明 |
引腳 |
簡(jiǎn)寫(xiě) |
功能說(shuō)明 | |
數(shù)據(jù)終端準(zhǔn)備(Data Terminal Ready) | 數(shù)據(jù)終端準(zhǔn)備(Data Terminal Ready) | |||||
地線(xiàn)(Ground) | 地線(xiàn)(Ground) | |||||
數(shù)據(jù)準(zhǔn)備好(Data Set Ready) | 數(shù)據(jù)準(zhǔn)備好(Data Set Ready) | |||||
請(qǐng)求發(fā)送(Request To Send) | 請(qǐng)求發(fā)送(Request To Send) | |||||
清除發(fā)送(Clear To Send) | 清除發(fā)送(Clear To Send) | |||||
振鈴指示(Ring Indicator) | 振鈴指示(Ring Indicator) |