Avago Technologies LSI53C1000R - Manual (Page 157)

SCSI Registers 4-45
Version 2.2 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
R Reserved 4
SPL1 Latched SCSI Parity for SD[15:8] 3
This active HIGH bit reflects the SCSI odd parity signal
corresponding to the data latched into the most significant
byte in the
SCSI Input Data Latch (SIDL) register.
R Reserved 2
LDSC Last Disconnect 1
This bit is used in conjunction with the Connected (CON)
bit in
SCSI Control One (SCNTL1) . It allows the user to
detect the case in which a target device disconnects, and
then a SCSI device selects or reselects the
LSI53C1000R. If the Connected bit and the LDSC bit are
asserted, a disconnect is indicated. This bit is set when
the Connected bit in SCNTL1 is off. This bit is cleared
when a Block Move instruction is executed while the
Connected bit in SCNTL1 is set.
SDP1 SCSI SDP1 Parity Signal 0
This bit represents the present state of the SCSI SDP1/
parity signal. It is not latched and may change as it is read.