Распиновка, расположение выводов и внешний вид устройства хранения данных:
ST506/412
Developed by Seagate.
Also known as MFM or RLL since these are the encoding methods
used to store data. Seagate originally developed it to support
their ST506 (5 MB) and ST412 (10 MB) drives.
The first drives used an encoding method called MFM (Modified
Frequency Modulation). Later a new encoding method was developed,
RLL (Run Length Limited). RLL had the advantage that it was
possible to store 50% more with it. But it required better
drives. This is almost never an problem. Often called 2,7 RLL
because the recording scheme involves patterns with no more than
7 successive zeros and no less than two.
(at the controller)
(at the controller)
(at the harddisk)
(at the harddisk)
34 PIN IDC MALE at the Controller.
20 PIN IDC MALE at the Controller.
34 PIN IDC FEMALE at the Harddisk.
20 PIN IDC FEMALE at the Harddisk.
Control connector
Pin
Name
Description
2
Head Sel 8
4
Head Sel 4
6
Write Gate
8
Seek Complete
10
Track 0
12
Write Fault
14
Head Sel 1
16
RES
(reserved)
18
Head Sel 2
20
Index
22
Ready
24
Step
26
Drive Sel 1
28
Drive Sel 2
30
Drive Sel 3
32
Drive Sel 4
34
Direction In
Note: All odd pins are GND, Ground.
Data connector
Pin
Name
Description
1
Drive Selected
2
GND
Ground
3
RES
(reserved)
4
GND
Ground
5
RES
(reserved)
6
GND
Ground
7
RES
(reserved)
8
GND
Ground
9
RES
(reserved)
10
RES
(reserved)
11
GND
Ground
12
GND
Ground
13
Write Data+
14
Write Data-
15
GND
Ground
16
GND
Ground
17
Read Data+
18
Read Data-
19
GND
Ground
20
GND
Ground
Contributor:
Joakim Цgren
Source:
?
Copyright © The Hardware Book Team 1996-2004.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2002-01-10