常用硬件接口定义规范-I

以下内容,选自:人www.mcuwork.com 1 ．计算机侧为25针公插: Pin Name ITU-T Dir Description 1 GND 101 Shield Ground 2 TXD 103 Transmit Data 3 RXD 104 Receive Data 4 RTS 105 Request to Send 5 CTS 106 Clear to Send 6 DSR 107 Data Set Ready 7 GND 102 System Ground 8 CD 109 Carrier Detect 9 - 　 - RESERVED 10 - 　 - RESERVED 11 STF 126 Select Transmit Channel 12 S.CD ? Secondary Carrier Detect 13 S.CTS ? Secondary Clear to Send 14 S.TXD ? Secondary Transmit Data 15 TCK 114 Transmission Signal Element Timing 16 S.RXD ? Secondary Receive Data 17 RCK 115 Receiver Signal Element Timing 18 LL 141 Local Loop Control 19 S.RTS ? Secondary Request to Send 20 DTR 108 Data Terminal Ready 21 RL 140 Remote Loop Control 22 RI 125 Ring Indicator 23 DSR 111 Data Signal Rate Selector 24 XCK 113 Transmit Signal Element Timing 25 TI 142 Test Indicator

 

2 ． PC/AT 机上的串行口是 9 针公插座，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

3．PC 并行接口外观是 25 针母插座：

Pin Name Dir Description 1 /STROBE Strobe 2 D0 Data Bit 0 3 D1 Data Bit 1 4 D2 Data Bit 2 5 D3 Data Bit 3 6 D4 Data Bit 4 7 D5 Data Bit 5 8 D6 Data Bit 6 9 D7 Data Bit 7 10 /ACK Acknowledge 11 BUSY Busy 12 PE Paper End 13 SEL Select 14 /AUTOFD Autofeed 15 /ERROR Error 16 /INIT Initialize 17 /SELIN Select In 18 GND Signal Ground 19 GND Signal Ground 20 GND Signal Ground 21 GND Signal Ground 22 GND Signal Ground 23 GND Signal Ground 24 GND Signal Ground 25 GND Signal Ground

4 ．PS/2 鼠标接口为 6 针母插，外观为：

 

Pin Name Dir Description 1 DATA " type="#_x0000_t75"> Key Data 2 n/c - Not connected 3 GND Gnd 4 VCC Power , 5 VDC 5 CLK Clock 6 n/c - Not connected

5．键盘接口为 5 针母插座：

Pin Name Description Technical 1 CLOCK Clock CLK/CTS, Open-collector 2 DATA Data RxD/TxD/RTS, Open-collector 3 n/c Not connected Reset on some very old keyboards. 4 GND Ground 　 5 VCC 5 VDC  

6．网卡上以及 Hub 上接口的外观为 8 芯母插座 (RJ45)： 网线上插头的外观为 8 芯公插头 (RJ45)：

Pin Name Description 1 TX Tranceive Data ( 发信号 ) 2 TX- Tranceive Data- ( 发信号 -) 3 RX Receive Data ( 收信号 ) 4 n/c Not connected ( 空脚 ) 5 n/c Not connected ( 空脚 ) 6 RX- Receive Data- ( 收信号 -) 7 n/c Not connected ( 空脚 ) 8 n/c Not connected ( 空脚 )

7．IDE 是 Integrated Drive Electronics 的缩写，由 Compaq 和 Western Digital 公司开发，新版的 IDE 命名为 ATA 即 AT bus Attachment，IDE 接口在设备和主板侧的外观为 40 脚插针：

Pin Name Dir Description 1 /RESET Reset 2 GND Ground 3 DD7 " type="#_x0000_t75"> Data 7 4 DD8 " type="#_x0000_t75"> Data 8 5 DD6 " type="#_x0000_t75"> Data 6 6 DD9 " type="#_x0000_t75"> Data 9 7 DD5 " type="#_x0000_t75"> Data 5 8 DD10 " type="#_x0000_t75"> Data 10 9 DD4 " type="#_x0000_t75"> Data 4 10 DD11 " type="#_x0000_t75"> Data 11 11 DD3 " type="#_x0000_t75"> Data 3 12 DD12 " type="#_x0000_t75"> Data 12 13 DD2 " type="#_x0000_t75"> Data 2 14 DD13 " type="#_x0000_t75"> Data 13 15 DD1 " type="#_x0000_t75"> Data 1 16 DD14 " type="#_x0000_t75"> Data 14 17 DD0 " type="#_x0000_t75"> Data 0 18 DD15 " type="#_x0000_t75"> Data 15 19 GND Ground 20 KEY - Key 21 n/c - Not connected 22 GND Ground 23 /IOW Write Strobe 24 GND Ground 25 /IOR Read Strobe 26 GND Ground 27 IO_CH_RDY 　 28 ALE Address Latch Enable 29 n/c - Not connected 30 GND Ground 31 IRQR Interrupt Request 32 /IOCS16 ? IO ChipSelect 16 33 DA1 Address 1 34 n/c - Not connected 35 DA0 Address 0 36 DA2 Address 2 37 /IDE_CS0 (1F0-1F7) 38 /IDE_CS1 (3F6-3F7) 39 /ACTIVE Led driver 40 GND Ground