3.75 pc
10.25 pc
11.25 pc
38.25 pc
4.333 pc
48.583 pc
52.5 pc
34.5 pc
44.25 pc
1-6
Using the SYM8953U Host Adapter
integration of I/O transceivers into the chip. LVD provides the reliability of
HVD SCSI without the added cost of external differential transceivers.
Ultra2 SCSI with LVD allows a longer SCSI cable and more devices on
the bus, using the same cables defined in the SCSI-3 parallel Interface
(SPI-2) standard for Ultra SCSI.
Important:
To utilize Ultra2 SCSI performance, you must only have
LVD devices on the bus. Do not mix any SE devices with
LVD devices or the entire bus will drop to SE, limiting bus
performance to Ultra SCSI levels.
1.3.5 On-Board LED
An on-board LED (CR1) indicates the status of the SCSI bus. This SCSI
Activity LED lights when the SCSI bus is transferring information. It is
located near J4 (see
Figure A.1
).
