Scsi transfer (sxfer), Register: 0x05 – Avago Technologies LSI53C1010R User Manual
Page 152
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Registers
Version 2.2
Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
configured in the
and
registers. The priority of the
16 possible IDs, in descending order is:
Register: 0x05
SCSI Transfer (SXFER)
Read/Write
This register is automatically loaded when a Table Indirect Select or
Reselect SCRIPTS instruction is executed.
R
Reserved
[7:6]
MO[5:0]
Max SCSI Synchronous Offset
[5:0]
These bits describe the maximum SCSI synchronous
offset used by the LSI53C1010R SCSI function when
transferring synchronous SCSI data in either the initiator
or target mode.
describes the possible
combinations and their relationship to the synchronous
data offset used by the LSI53C1010R SCSI function.
These bits determine the LSI53C1010R SCSI function’s
method of transfer for ST/DT Data-In and ST/DT
Data-Out phases only; all other information transfers
occur asynchronously. Note that the SCSI offset for
Ultra160 transfers is counted as the maximum number of
data transfers allowed to be outstanding, not the
maximum REQ pulses allowed to be outstanding.
During ST Data-In or ST Data-Out transfers the
maximum supported offset is 31 (MO[5:0] = 0x1F).
During DT Data-In or DT Data-Out transfers the
maximum supported offset is 62 (MO[5:0] = 0x3E).
Setting offset values outside the allowable range results
in data corruption.
Highest
Lowest
7
6
5
4
3
2
1
0 15 14 13 12 11 10 9
8
7
6
5
0
R
MO[5:0]
0
0
0
0
0
0
0
0