Registers: 0xe8–0xef – Avago Technologies LSI53C1000R User Manual
Page 235
SCSI Registers
4-123
Version 2.2
Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
CRCD
CRC Data
[31:0]
If CRCDSEL = 0b00, this register represents the current
CRC value. After sending data during the DT Data-Out
phase, this register contains the CRC calculation for that
data, if no CRC request occurred during the transfer. In
this mode, this register is read only.
If CRCDSEL = 0b01, this register represents the CRC
Input register and contains its current value. It normally
contains the SCSI data transferred to or from the SCSI
bus during a DT transfer phase. In this mode, this register
can be written to in order to manually alter the input data
used for CRC calculation. For normal operations, this
register should never be written to.
If CRCDSEL = 0b10, this register represents the
CRC Accumulator and contains its current value. In this
mode, this register can be written to in order to manually
modify the value in the accumulator. This register should
not be written to during normal operation as corrupt CRC
values result.
If CRCDSEL = 0b11, this register contains the saved bad
CRC value that was calculated when a CRC error was
detected. After a CRC error is detected, this register is
not overwritten until the error condition is cleared.
Registers: 0xE8–0xEF
Reserved
This register is reserved.
31
0
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0