LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 152

• Manufacturer Part Number: LSI53C825AJ
• Manufacturer: LSI

Specifications of LSI53C825AJ

• Lead Free Status / RoHS Status: Not Compliant

4-64
31
31
0
x
0
x
0
x
0
x
0
x
0
x
0
x
Registers: 0x2C–0x2F (0xAC–0xAF)
DMA SCRIPTS Pointer (DSP)
Read/Write
DSP
Registers: 0x30–0x33 (0xB0–0xB3)
DMA SCRIPTS Pointer Save (DSPS)
Read/Write
DSPS
Registers
0
x
0
x
0
x
0
x
0
x
DMA SCRIPTS Pointer
To execute SCSI SCRIPTS, the address of the first
SCRIPTS instruction must be written to this register. In
normal SCRIPTS operation, once the starting address of
the SCRIPT is written to this register, SCRIPTS are
automatically fetched and executed until an interrupt
condition occurs.
In the single step mode, there is a single step interrupt
after each instruction is executed. The
Pointer (DSP)
the next address, but the Start DMA bit (bit 2,
trol (DCNTL)
interrupt occurs to fetch and execute the next SCRIPTS
command. When writing this register eight bits at a time,
writing the upper eight bits begins execution of SCSI
SCRIPTS. The default value of this register is zero.
DMA SCRIPTS Pointer Save
This register contains the second Dword of a SCRIPTS
instruction. It is overwritten each time a SCRIPTS
instruction is fetched. When a SCRIPTS interrupt
instruction is executed, this register holds the interrupt
vector. The power-up value of this register is
indeterminate.
0
x
0
x
0
x
DSPS
0
DSP
x
0
x
register) must be set each time the step
0
register does not need to be written with
x
0
x
0
x
0
x
0
x
0
x
0
x
0
x
0
x
DMA SCRIPTS
0
x
0
x
0
x
DMA Con-
0
x
[31:0]
[31:0]
0
x
0
0
0
x