IDE和FDD(顶视图) 电脑中IDE接口和FDD接口各引脚定义(顶视图)
IDE接口定义 | FDD接口定义 | 引脚 | IDE信号 | 引脚 | IDE信号 | 引脚 | 信号 | 引脚 | 信号 | 1 | Reset | 2 | GND | 1 | GND | 2 | Redaced write(o) | 3 | D7 | 4 | D8 | 3 | 保留 | 4 | Head load(I) | 5 | D6 | 6 | D9 | 5 | GND | 6 | FDHDIN | 7 | D5 | 8 | D10 | 7 | GND | 8 | Index(o) | 9 | D4 | 10 | D11 | 9 | GND | 10 | Motor enadle 1 (I) | 11 | D3 | 12 | D12 | 11 | GND | 12 | Drive select 0 (I) | 13 | D2 | 14 | D13 | 13 | GND | 14 | Drive select 1 (I) | 15 | D1 | 16 | D14 | 15 | GND | 16 | Motor enadle 0 (I) | 17 | D0 | 18 | D15 | 17 | GND | 18 | Driect select(I) | 19 | GND | 20 | KEY( 未用) | 19 | GND | 20 | Step(I) | 21 | DMARQ | 22 | GND | 21 | GND | 22 | Write data (I) | 23 | DIOW- | 24 | GND | 23 | GND | 24 | Write enable(I) | 25 | DIOR- | 26 | GND | 25 | GND | 26 | Track 0 (o) | 27 | IORDY | 28 | ALE( 允许) | 27 | GND | 28 | Write protect(o) | 29 | DMACK | 30 | GND | 29 | GND | 30 | Read data (o) | 31 | INTRQ | 32 | IOCS16 | 31 | GND | 32 | Head select(I) | 33 | DA1 | 34 | PDIAG- | 33 | GND | 34 | Disk change (o) | 35 | DA0 | 36 | DA2 | 注:“O”表来源于驱动器的信号。“I”表来源于接口控制器的信号。 | 37 | CSOfx | 38 | CSIfx | 39 | DASP | 40 | GND | 注: 1、DMARQ DMA请求信号; 2、DMACK为DMA响应信号; 3、IORDY为IO设备就绪信号; 4、INTRQ为中断请求信号; 5、IOCS16#为IO片选16 ; |