LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 220

• Manufacturer Part Number: LSI53C825AJ
• Manufacturer: LSI

Specifications of LSI53C825AJ

• Lead Free Status / RoHS Status: Not Compliant

5.6.2 Second Dword
5.7 Memory Move Instructions
5-36
WVP
DCM
DCV
For Memory Move instructions, bits 5 and 4 (SIOM and DIOM) in the
DMA Mode (DMODE)
destination addresses reside in memory or I/O space. By setting these
bits appropriately, data may be moved within memory space, within I/O
space, or between the two address spaces.
The Memory Move instruction is used to copy the specified number of
bytes from the source address to the destination address.
SCSI SCRIPTS Instruction Set
Wait For Valid Phase
If the Wait for Valid Phase bit is set, the LSI53C825A
waits for a previously unserviced phase before comparing
the SCSI phase and data.
If the Wait for Valid Phase bit is cleared, the LSI53C825A
compares the SCSI phase and data immediately.
Data Compare Mask
The Data Compare Mask allows a SCRIPT to test certain
bits within a data byte. During the data compare, if any
mask bits are set, the corresponding bit in the
Byte Received (SFBR)
a mask of 0b01111111 and data compare value of
0b1XXXXXXX allows the SCRIPTS processor to
determine whether or not the high order bit is set while
ignoring the remaining bits.
Data Compare Value
This 8-bit field is the data compared against the register.
These bits are used in conjunction with the Data
Compare Mask Field to test for a particular data value.
Jump Address
This 32-bit field contains the address of the next
instruction to fetch when a jump is taken. Once the
LSI53C825A fetches the instruction from the address
pointed to by these 32 bits, this address is incremented
by 4, loaded into the
register and becomes the current instruction pointer.
register determine whether the source or
DMA SCRIPTS Pointer (DSP)
data byte is ignored. For instance,
SCSI First
[15:8]
[31:0]
[7:0]
16