LSI53C040-160QFP LSI, LSI53C040-160QFP Datasheet - Page 24

• Manufacturer Part Number: LSI53C040-160QFP
• Manufacturer: LSI

Specifications of LSI53C040-160QFP

• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Supplier Unconfirmed

checking during the selection/reselection phase may be in error and
should not be monitored. This limits the LSI53C040 to only target
applications, with no disconnects, on a wide bus.
To select a high ID for the LSI53C040, connect any of the SCSI high data
lines (8–15) to one of the SHID[2:0] pins. The user can monitor the value
of the SHID[2:0] pins by reading the SHID[2:0] bits in the
Current SCSI
Data High (CSDHI)
register (0xFC08). The
Select Enable High (SENHI)
register allows a bit to be set that corresponds to the device SCSI ID.
This allows an interrupt to be generated if the corresponding data line is
driven during selection, if the data line is connected to the appropriate
SHIDx pin.
Figure 2.3
on
page 2-7
illustrates SCSI arbitration and
selection/reselection and DMA target transfers.
2-6
Functional Description