4-40
Registers
MDPE
Master Data Parity Error
6
This bit is set when the LSI53C1000, acting as a PCI
master, detects a data parity error, or, when acting as a
target device, signals a parity error during a data phase.
This bit is completely disabled by the Master Parity Error
Enable bit (bit 3 of
).
BF
Bus Fault
5
This bit is set when a PCI bus fault condition is detected.
A PCI bus fault can only occur when the LSI53C1000 is
bus master, and is defined as a cycle that ends with a
Bad Address or Target Abort Condition.
ABRT
Aborted
4
This bit is set when an abort condition occurs. An abort
condition occurs when a software abort command is
issued by setting bit 7 of the
register.
SSI
Single Step Interrupt
3
If the Single-Step Mode bit in the
register is set, this bit is set and an interrupt generated
after successful execution of each SCRIPTS instruction.
SIR
SCRIPTS Interrupt Instruction Received
2
This status bit is set whenever an interrupt instruction is
evaluated as true.
R
Reserved
1
IID
Illegal Instruction Detected
0
This status bit is set any time an illegal or reserved
instruction opcode is detected, whether the LSI53C1000
is operating in single-step mode or automatically
executing SCSI SCRIPTS.
Any of the following conditions during instruction
execution also sets this bit:
•
The LSI53C1000 is executing a Wait Disconnect
instruction and the SCSI REQ line is asserted without
a disconnect occurring.
•
A Block Move instruction is executed as an initiator
with 0x000000 loaded into the
register, indicating there are zero bytes to
move.
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...