LSI53C875 LSI Logic, LSI53C875 Datasheet - Page 40

• Manufacturer Part Number: LSI53C875
• Description: PCI to Ultra SCSI I/O Processor
• Manufacturer: LSI Logic

2.5.8.1 Data Paths
Figure 2.2
2-16
SODL Register
Asynchronous
PCI Interface
SCSI Interface
(32 Bits x 16)
SCSI Send
DMA FIFO
LSI53C875 Host Interface Data Paths
The data path through the LSI53C875 is dependent on whether data is
being moved into or out of the chip, and whether SCSI data is being
transferred asynchronously or synchronously.
Figure 2.2
different modes.
Functional Description
SIDL Register
Asynchronous
SCSI Receive
SCSI Interface
PCI Interface
(32 Bits x 16)
DMA FIFO
shows how data is moved to/from the SCSI bus in each of the
SWIDE Register
SODL Register
SODR Register
SCSI Interface
Synchronous
(32 Bits x 16)
PCI Interface
SCSI Send
DMA FIFO
(8 or 16 Bits x 16)
SCSI Receive
SCSI Interface
Synchronous
(32 Bits x 16)
PCI Interface
DMA FIFO
SCSI FIFO
SWIDE Register