LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 198

• Manufacturer Part Number: LSI53C825AJ
• Manufacturer: LSI

Specifications of LSI53C825AJ

• Lead Free Status / RoHS Status: Not Compliant

5.4 I/O Instruction
5.4.1 First Dword
5-14
I/O Instructions perform the following SCSI operations in Target and
Initiator mode. These I/O operations are chosen with the opcode bits in
the
OPC2
0
0
0
0
1
This section describes these I/O operations.
IT[1:0]
OPC[2:0]
SCSI SCRIPTS Instruction Set
DMA Command (DCMD)
OPC1
0
0
1
1
0
Instruction Type - I/O Instruction
The IT bit configuration (01) defines an I/O Instruction
Type.
Opcode
The Opcode bit configurations define the I/O operation
performed, but the Opcode bit meanings change in
Target mode compared to Initiator mode. Opcode bit
configurations (101, 110, and 111) are considered
Read/Write instructions, and are described in
Section 5.5, “Read/Write Instructions.”
describes Target mode operations.
OPC0
0
1
0
1
0
register.
Target Mode
Reselect
Disconnect
Wait Select
Set
Clear
Initiator Mode
Select
Wait Disconnect
Wait Reselect
Set
Clear
This section
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