68 Pin Auxiliary Connector
12
Pin # 11
9
7
5
3
1
10
8
6
4
2
+5V
ID3 ID2 ID1 ID0
SCSI Address
Enable Active Termination
(Unused for differential models)
Write Protect
Unused
Ground
Auto Spin Start
External Activity LED
Reserved
SCSI ID (Address) Pins
Note: In the address determination
tables, “off” means jumper is not
in place and “on” means jumper
is in place.
Bit 3 Bit 2 Bit 1
Bit 0
Address
off off off off
0
off off off on
1
off off on off
2
off off on on
3
off on off off
4
off on off on
5
off on on off
6
off on on on
7
on off off off
8
on off off on
9
on off on off
10
on off on on
11
on on off off
12
on on off on
13
on on on off
14
on on on on
15
Address Determination
68 and 80 pin models
Bit 2
Bit 1
Bit 0
Address
off off off
0
off off on
1
off on off
2
off on on
3
on off off
4
on off on
5
on on off
6
on
on on 7
Address Determination of 50 pin
models
Auto Start and Delay Pins
The Auto Start and Auto Start Delay
pins control when and how the drive
can spin up and come ready.
When configured for Auto-Startup, the
motor spins up after power is applied
without the need of a SCSI Start Unit
command. For no Auto-Start, a SCSI
Start Unit command is required to make
the drive spin and be ready for media
access operations. When in Auto-Start
mode, the drive will delay its start time
by a period of time multiplied by its own
SCSI address.
Pins (50 and 68
Drive
interface pin models)
Behaviour
Auto
Auto
Auto Delay(sec)
Start Delay Start
Start
Multiplier
off
off
No
N/A
off
on
Yes
0
on
off
Yes
10
on
on
Yes
4
Auto-Startup Modes selectable by
Auto-Start/Delay Pin Combinations.
Pins (80 interface
Drive
pin model)
Behaviour
Auto
Auto
Auto Delay(sec)
Start Delay Start
Start
Multiplier
off
off
Yes
0
off
on
No
N/A
on
off
Yes
10
on
on
No
N/A
Auto-Startup Modes selectable by
Auto-Start/Delay Pin Combinations.
PACKAGING: The drive must
be protected against
electrostatic Discharge
especially
when
being handled.
The safest way to avoid
damage is to put the drive in an anti
static bag before ESD wrist straps etc.
are removed.
Drives should only be shipped in
approved containers, severe damage
can be caused to the drive if the
packaging does not adequately protect
against the shock levels induced when
a box is dropped. Consult your IBM
marketing representative if you do not
have an approved shipping container.
External Activity (LED) Pins
The LED pins can be used to drive an
external Light Emitting Diode. Please
refer to the LED pin section of the
Ultrastar Interface Specification for a
detailed functional description of this
pin, which is controlled by Mode Select
(Page 0). Up to 33mA ( 5%) of TTL
level LED drive capability is provided.
Current limiting for the LED is provided
on the electronics card. The LED Anode
may be tied to the + 5V source provided
on pin 18 of the Front Option Jumper
Block, pin 11 of the Auxiliary connector
on the 68 pin Unitised connector or the
5V power source on the 80 pin SCA
model. The LED Cathode is then
connected to the EXTERNAL ACTIVITY
Pin to complete the circuit.
Note: 68 pin and 80 pin SCA SCSI
models have two sets of pins, a
set on the front and a set on the
back, that are connected to the
same LED driver circuit. The
combined drive capability is
stated above.
Write Protect Pin
If the Write Protect pin is jumpered to
ground, the drive will prohibit SCSI
commands that alter the customer data
area portion of the media from being
performed. The state of this pin is
monitored on a per command basis.
See the Ultrastar 9LP & 18XP interface
specification for functional details.
