Control Signals - Seagate ST506 Manual

HOST SYSTEM
~
_.
~
-
- -
It..
It.
L-
--
~
It.
-
It..
"
...
X
-
"
X
'""
-==-
DC GNO
m
6
FRAME GNO
ST506 DRIVE INTERFACE
FIGURE 4: CONTROL SIGNALS
J2/P2 NOT SHOWN
FLAT RIBBON OR
TWISTED PAIR MAX 20 FEET
- REDUCED WRITE CURRENT
RESERVED (HEAD 22)
- WRITE GATE
- SEEK COMPLETE
- TRACK
f6
- WRITE FAULT
- HEAD SELECT 2 0
RESERVED (TO J2 PIN
7)
- HEAD SELECT 21
- INDEX
- READY
- STEP
-
DRIVE SELECT 1
- DRIVE SELECT 2
- DRIVE SELECT
3
- DRIVE SELECT 4
- DIRECTION IN
+
SVDC
+
SV
RETURN
+
12VDC
+
12V
RETURN
-
-
-
.-
-
-
--
-
--
-
- -
-
-
-
--
- -
.-
-
-
-
---
--
-
~
TWISTED PAIR (20 GA
or larger)
13
,
ST 500
1 -
2
3~.
4
S~.
6
7---U
8
9 - - 0
10
11--0
12
13 _____
~
14
1S~~
16
17---0
18
19--H
Jl/Pl
20
21~~
2~
23---0
24
2S~.
26
27--U
28
29~.
30
31~~
32
33----4~
34
-=-=
4
3
J3/P3
1
2
-...l.-
FRAME
GROUND
I I I I I
J4/P4