Avago Technologies LSI53C1010R - Manual (Page 105)

SCSI Bus Interface Signals 3-11
Version 2.2 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
A_SDP[1:0]
−
W2, P4 I/O SE:
48 mA
SCSI
LVD:
12 mA
UniLVD
SCSI Function A Parity.
LVD Mode: Negative half of the LVDlink
pair for the SCSI parity lines. A_SDP[1:0]
−
are the SCSI data parity lines.
SE Mode: A_SDP[1:0]
−
are the SCSI data
parity lines.
A_SDP[1:0]+ W1, P5 I/O SE:
48 mA
SCSI
LVD:
12 mA
UniLVD
SCSI Function A Parity.
LVD Mode: Positive half of the LVDlink pair
for the SCSI parity lines. A_SDP[1:0]+ are
the SCSI data parity lines.
SE Mode: A_SDP[1:0]+ are at 0 V.
A_DIFFSENS E2 I N/A SCSI Function A Differential Sense pin
detects the present mode of the SCSI bus
when connected to the DIFFSENS signal
on the physical SCSI bus.
LVD Mode: If a voltage between 0.7 V and
1.9 V is present, SCSI Function A operates
in the LVD mode.
SE Mode: When this pin is driven LOW
(below 0.5 V), SE operation is indicated.
SCSI Function A operates in the SE mode.
HVD Mode: When this pin is detected
HIGH (above 2.0 V), HVD operation is
indicated. SCSI Function A is driven to the
high impedance state. This pin is 5 V
tolerant. The HVD Mode is not supported.
Table 3.9 SCSI Function A Signals (Cont.)
Name Bump Type Strength Description