Western Digital WDE2170 - Manual (Page 37)

WD Enterprise WDE2170/WDE4360 The Option Block
4079-001045 Rev. B RELEASED 04-08-97 29
5.3. Option Block Pin Assignments
The option block is used to modify the drive characteristics. The table below shows the
pin numbers that correspond to each option or signal, and provides instruction for
enabling and disabling these features. Refer to the WD Enterprise Installation Guide
(document number 4079-001046) for option definitions.
Table 5-1. Option Block Pin Assignments
OPTION/SIGNAL PINS CONFIGURATION NOTES
SCSI IDs 1 - 8 Set according to Table 5-2.
(KEY)/LED- X - 10 X - no pin/10 - LED cathode connection
RESERVED 11 - 12 11 - Ground/12 - Reserved
OPT 1: DISABLE AUTO START 13 - 14 Install jumper to disable auto start.
OPT 2: AUTO START DELAY 15 - 16 Install jumper to enable auto start delay.
OPT 3: SCAM 17 - 18 Install jumper to enable SCAM.
OPT 4: DISABLE UNIT ATTENTION 19 - 20 Install jumper to disable unit attention.
OPT 5: DISABLE TARGET INITIATED
SYNCHRONOUS/WIDE NEGOTIATION
21 - 22
Install jumper to disable target initiated
synchronous/wide negotiation.
OPT 6: SCSI TERMINATION 23 - 24 Install jumper to enable SCSI termination.
TXD/RXD 25 - 26 Reserved
TPWR/+5V 27 - 28
Install jumper to enable TERMPWR on the
SCSI bus.
LED+/+5V 29 - 30 29 - LED anode connection/30 - Reserved
+12R/+12R 31 - 32 Reserved
+12V/+12V 33 - 34 Reserved
Note: Pins 1,3,5,7,11,13,15,17,19,21, and 23 are ground.