7.2.1.3 Position #7-8: Disable SCSI Parity Check
Installing a jumper disables SCSI Parity checking
.
7.2.1.4 Position #9-10
:
Enable TI-SDTR
Installing a jumper enables Target Initiated Synchronous Data Transfer Request (SDTR) and Wide Data
Transfer Request (WDTR) negotiation. If this jumper is not installed, SSM (Synchronous select Mode) bit
in Mode Page 0 controls Target Initiated SDTR and WDTR negotiation. If this jumper is installed, SSM bit
is ignored.
7.2.1.5 Position #11-12
:
Disable Unit Attention
Installing a jumper enables control of UAI (Unit Attention Inhibit) bit in Mode Page 0.
7.2.1.6 Position #13-14
Reserved.
7.2.2 Jumper signal description on J4
7.2.2.1 Position #1-2
:
LED pins
The LED pins are used to drive an external Light Emitting Diode. Up to 30 mA of sink current capability
is provided. The LED Anode must be tied to the current l 5 V source provided on the pin for LED
Anode at the Location #1 on J4 jumper block. The LED Cathode is then connected to the pin for LED
Cathode at the Location #2 on J4 jumper block to complete the circuit.
68pin
+5V
150 Ohms
(pin 1 of J-4) to LED Anode
(pin2 of J-4) to LED Cathode
Positions #1,#2 on
J-4 Jumper Block
150 Ohms
pin 8 of AUX connector
80pin
+5V
150 Ohms
(pin 1 of J-4) to LED Anode
(pin2 of J-4) to LED Cathode
Positions #1,#2 on
J-4 Jumper Block
0 Ohms
pin 77 of 80pin connector
+5V
(on board) LED
620 Ohms
Figure 24. LED circuit
7.2.2.2 Position #3-4 on J4: Term Power
Not connected for 80-pin models. If a jumper is installed on 68-pin models, termination power is supplied
to pins 17, 18, 51, and 52 of the 68-pin SCSI interface.
7.2.2.3 Position #5-6 on J4: Force SE mode
If a jumper is installed, the drive functions as a single-ended mode drive.
Ultrastar 146Z10 hard disk drive specifications
28
Содержание IC35L018UCDY10
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