Avago Technologies LSI53C896 - Manual (Page 105)

SCSI Bus Interface Signals 3-17
Version 3.3 Copyright © 1998–2003 by LSI Logic Corporation. All rights reserved.
B_DIFFSENS Y21 I N/A SCSI Function B Differential Sense pin
detects the present mode of the SCSI
bus when connected to the DIFFSENS
signal on the physical SCSI bus.
LVD Mode: When a voltage between
0.7 V and 1.9 V is present on this pin,
the SCSI Function B operates in the
LVD mode.
SE Mode: When this pin is driven LOW
(below 0.5 V) indicating SE bus
operation, the SCSI Function B
operates in the SE mode.
HVD Mode: When this pin is detected
HIGH (above 2.4 V) indicating an HVD
bus, the SCSI Function B 3-states its
SCSI drivers. Set the DIF bit in
SCSI Test Two (STEST2) to enable
HVD drivers.
Table 3.13 SCSI Function B Signals (Cont.)
Name Bump Type Strength Description