2-18
Functional Description
2.1.3.6 Memory-to-Memory Moves
Memory-to-Memory moves also support PCI cache commands, as
described above, with one limitation: Memory Write and Invalidate on
Memory-to-Memory Move writes are only supported if the source and
destination address are quad word aligned. If the source and destination
are not quad word aligned, i.e., Source Address[2:0] == Destination
Address[2:0], write alignment is not performed and Memory Write and
Invalidates are not issued.
The LSI53C1000 is little endian. This mode assigns the least significant
byte to bits [7:0].
2.2 SCSI Functional Description
The Ultra160 SCSI controller on the LSI53C1000 supports either an 8-bit
or 16-bit SCSI bus. The controller supports Wide Ultra160 SCSI
synchronous transfer rates up to 160 Mbytes/s on an LVD SCSI bus. The
LSI53C1000 can be programmed with SCSI SCRIPTS, making it easy to
“fine tune” the system for specific mass storage devices or Ultra160 SCSI
requirements.
on
illustrates the relationship between
the LSI53C1000 modules.
The LSI53C1000 offers low level register access or a high level control
interface. Like first generation SCSI devices, the LSI53C1000 is
accessed as a register-oriented device. The ability to sample and/or
assert any signal on the SCSI bus is used in error recovery and
diagnostic procedures.
The LSI53C1000 is controlled by the integrated SCRIPTS processor
through a high level logical interface. Commands controlling the SCSI
function are fetched out of the main host memory or local memory. These
commands instruct the SCSI function to Select, Reselect, Disconnect,
Wait for a Disconnect, Transfer Information, Change Bus Phases, and
implement all other aspects of the SCSI protocol. The SCRIPTS
processor is a special high-speed processor optimized for SCSI protocol.
Содержание LSI53C1000
Страница 6: ...vi Preface...
Страница 16: ...xvi Contents...
Страница 28: ...1 12 Introduction...
Страница 234: ...4 124 Registers...
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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...