SCSI Registers
4-49
DIP
DMA Interrupt Pending
0
This status bit is set when an interrupt condition is
detected in the DMA portion of the LSI53C1000. The
following conditions cause a DMA interrupt to occur:
•
A PCI parity error is detected
•
A bus fault is detected
•
An abort condition is detected
•
A SCRIPTS instruction is executed in the single-step
mode
•
A SCRIPTS interrupt instruction is executed
•
An illegal instruction is detected
To determine exactly which condition(s) caused the
interrupt, read the
register.
Register: 0x15
Interrupt Status One (ISTAT1)
Read/Write
R
Reserved
[7:3]
FLSH
Flushing
2
If this bit is set, the chip is flushing data from the DMA
FIFO. If cleared, no flushing is occurring. This bit is read
only. Writes do not affect the value of this bit.
SRUN
SCRIPTS Running
1
If this bit is set, the SCRIPTS engine is currently fetching
and executing SCRIPTS instructions. If it is cleared, the
SCRIPTS engine is not active. This bit is read only.
Writes do not affect the value of this bit.
SI
SYNC_IRQD
0
Setting this bit disables the INTA/ pin for the LSI53C1000,
except for the SCSI gross error, bus fault, residual data
in SCSI FIFO, and data underflow interrupts. Clearing
this bit enables normal operation of the INTA/ pin. If the
INTA/ is already asserted and this bit is set, INTA/
7
3
2
1
0
R
FLSH
SRUN
SI
0
0
0
0
0
0
0
0
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
Страница 314: ...6 40 Specifications This page intentionally left blank...
Страница 318: ...6 44 Specifications This page intentionally left blank...
Страница 344: ...6 70 Specifications This page intentionally left blank...
Страница 350: ...6 76 Specifications Figure 6 42 LSI53C1000 329 Ball Grid Array Bottom view...
Страница 352: ...6 78 Specifications...
Страница 360: ...A 8 Register Summary...
Страница 376: ...IX 12 Index...