ESDI 接口


    ESDI 是 Enhanced Small Device Interface 的缩写,早在 1980 年由 Maxtor 公司开发,是老式硬盘的接口,它的电缆由两部分组成,ESDI 接口在接口卡侧的外观为 34 脚和 20 脚公插针:

34 PIN IDC MALE
20 PIN IDC MALE

在硬盘侧为 34 脚的控制信号和 20 脚数据信号:

34 PIN IDC FEMALE
20 PIN IDC FEMALE

引脚定义


34 脚的控制信号:

Pin

Name

Description

2

 

Head Sel 3

4

 

Head Sel 2

6

 

Write Gate

8

 

Config/Stat Data

10

 

Transfer Acknowledge

12

 

Attention

14

 

Head Sel 0

16

 

Sect/Add MK Found

18

 

Head Sel 1

20

 

Index

22

 

Ready

24

 

Transfer Request

26

 

Drive Sel 1

28

 

Drive Sel 2

30

 

Drive Sel 3

32

 

Read Gate

34

 

Command Data

20 脚的数据信号:

Pin

Name

Description

1

 

Drive Selected

2

 

Sect/Add MK Found

3

 

Seek Complete

4

 

Address Mark Enable

5

 

(reserved, for step mode)

6

GND

Ground

7

 

Write Clock+

8

 

Write Clock-

9

 

Cartridge Changed

10

 

Read Ref Clock+

11

 

Read Ref Clock-

12

GND

Ground

13

 

NRZ Write Data+

14

 

NRZ Write Data-

15

GND

Ground

16

GND

Ground

17

 

NRZ Read Data+

18

 

NRZ Read Data-

19

GND

Ground

20

GND

Ground


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