IBM 4840-563 System Reference - Page 53

Ethernet connector, External video connector

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Pin No. Signal name I/O Signal Description 1 GND Power Ground 2 +5V Power Supply 3 GND Power Ground 4 GND Power Ground 5 N.C 6 DR0 O Drive Select 0. Select drive 0. 7 MTR0 O Motor Control 0 8 DIR O Direction. Direction of head movement (0 = inward motion, 1 = outward motion) 9 WDATA O Write Data. Encoded data to the drive for write operations. 10 GND Power Ground 11 DRVDEN0 O Drive density select 0 12 RDATA I Read Data. Raw serial bit stream from the drive for read operations. 13 N.C 14 N.C 15 N.C 16 N.C 17 INDEX I Index. Sense to detect that the head is positioned over the beginning of a track 18 N.C 19 N.C 20 GND Power Ground 21 STEP O Step. Low pulse for each track-to-track movement of the head. 22 WGATE O Write Gate. Signal to the drive to enable current flow in the write head. 23 TRK0 I Track 0. Sense to detect that the head is positioned over track 0. 24 WRTPROT I Write Protect. Sense for detection that the SurePOS 500 Model XX3 Technical Reference, v 1.3 81 Page 53 of

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Pin No.
Signal name
I/O
Signal Description
1
GND
Power Ground
2
+5V
Power Supply
3
GND
Power Ground
4
GND
Power Ground
5
N.C
6
DR0
O
Drive Select 0. Select drive 0.
7
MTR0
O
Motor Control 0
8
DIR
O
Direction. Direction of head movement (0 =
inward motion, 1 = outward motion)
9
WDATA
O
Write Data. Encoded data to the drive for write
operations.
10
GND
Power Ground
11
DRVDEN0
O
Drive density select 0
12
RDATA
I
Read Data. Raw serial bit stream from the
drive for read operations.
13
N.C
14
N.C
15
N.C
16
N.C
17
INDEX
I
Index. Sense to detect that the head is
positioned over the beginning of a track
18
N.C
19
N.C
20
GND
Power Ground
21
STEP
O
Step. Low pulse for each track-to-track
movement of the head.
22
WGATE
O
Write Gate. Signal to the drive to enable
current flow in the write head.
23
TRK0
I
Track 0. Sense to detect that the head is
positioned over track 0.
24
WRTPROT
I
Write Protect. Sense for detection that the
SurePOS 500 Model XX3 Technical Reference, v 1.3
Page 53 of
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