Connector - ESDI

ESDI=Enhanced Small Device Interface.
Developed by Maxtor in the early 1980's as an upgrade andimprovement to the ST506 design.

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.

20 PIN IDC FEMALE (at the harddisk)
20 PIN IDC MALE (at the controller)
34 PIN IDC FEMALE (at the harddisk)
34 PIN IDC MALE (at the controller)
PinNameDescription
2Head Sel 3
4Head Sel 2
6Write Gate
8Config/Stat Data
10Transfer Acknowledge
12Attention
14Head Sel 0
16Sect/Add MK Found
18Head Sel 1
20Index
22Ready
24Transfer Request
26Drive Sel 1
28Drive Sel 2
30Drive Sel 3
32Read Gate
34Command Data

Note: All odd are GND, Ground.

Data connector

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

Source: HW-Book 2001-06-08
Last modified: 2007-06-27 14:22:59.0
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