Avago Technologies LSI53C1030 - Manual (Page 71)

SCSI Interface Signals 3-11
Version 2.2 Copyright © 2001, 2002, 2003 by LSI Logic Corporation. All rights reserved.
A_VDDBIAS T1 O N/A A_VDDBIAS provides power for the
A_RBIAS circuit.
A_RBIAS R1 I N/A Connect a 9.76 k
Ω
or 10.0 k
Ω
resistor
between the A_VDDBIAS and A_RBIAS
pins to generate the LVD signalling pad bias
current.
A_DIFFSENS E2 I N/A The SCSI Channel [0] Differential Sense
pin detects the present mode of the SCSI
bus. This signal is 5 V tolerant and must
connect to the DIFFSENS signal on the
physical SCSI bus.
SE Mode: Driving this pin below 0.5 V
(LOW) indicates an SE bus and places
SCSI Channel [0] in the SE bus mode.
LVD Mode: Driving this signal between 0.7 V
and 1.9 V (intermediate) indicates an LVD
mode and places SCSI Channel [0] in the
LVD bus mode.
HVD Mode: Driving this pin above 2.0 V
(HIGH) indicates an HVD bus and causes
SCSI Channel [0] to 3-state its SCSI drivers.
Table 3.9 SCSI Channel [0] Interface Signals (Cont.)
Signal Name BGA Position Type Strength Description