Avago Technologies LSI53C1000R - Manual (Page 142)

4-30 Registers
Version 2.2 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
expects a disconnect to occur, normally prior to sending
an Abort, Abort Tag, Bus Device Reset, Clear Queue or
Release Recovery message, or before deasserting
SACK/ after receiving a Disconnect command or
Command Complete message.
CHM Chained Mode 6
This bit determines whether or not the SCSI core is
programmed for chained SCSI mode. This bit is
automatically set by the Chained Block Move (CHMOV)
SCRIPTS instruction and is automatically cleared by the
Block Move SCRIPTS instruction (MOVE). For more
information, refer to
Section 2.2.18, “Chained Block Moves.”
R Reserved [5:4]
WSS Wide SCSI Send 3
When read, this bit returns the value of the Wide SCSI
Send (WSS) flag. Asserting this bit clears the WSS flag.
This clearing function is self-clearing. For more information
refer to
Section 2.2.18, “Chained Block Moves.”
VUE0 Vendor Unique Enhancements, Bit 0 2
This bit is a read only value indicating whether the group
code field in the SCSI instruction is standard or vendor
unique. If cleared, the bit indicates standard group codes;
if set, the bit indicates vendor unique group codes. The
value in this bit is reloaded at the beginning of all
asynchronous target receives.
VUE1 Vendor Unique Enhancement, Bit 1 1
This bit disables the automatic byte count reload during
Block Move instructions in the Command phase. If this bit
is cleared, the device reloads the Block Move byte count
if the first byte received is one of the standard group
codes. If this bit is set, the device does not reload the
Block Move byte count, regardless of the group code.
WSR Wide SCSI Receive 0
When read, this bit returns the value of the Wide SCSI
Receive (WSR) flag. Setting this bit clears the WSR flag.
This bit is self-clearing.
For more information refer to
Section 2.2.18, “Chained Block Moves.”