Conner CFP2105 series, Product Manual, Page: 53 / 90

Installing the Drive Chapter 4
Technical Reference Manual Page 45
- XTFAULT
This signal is intended to drive an LED to indicate an external fault condition
has occurred. This signal is held asserted following the application of power or
optionally the negation of -RST during initialization while the SCSI ID is being
read. This signal is not supported but meets the requirement of negating the
signal while the ID is being read.
- SEL1
Bit 1 of the binary coded SCSI ID selection input. This signal has a value of 0
when it is negated and a value of 2 when it is asserted for the purpose of
selection or arbitration.
This signal is latched within 250 msec of the application of valid power to the
drive or optionally the negation of -RST.
If SCSI ID SEL 1 is intended to be selected, the host must provide a low
impedance connection from - SEL1 to - VUNIQ or to ground, while the ID is
being latched, through an appropriate means. Refer to chapter 5 for specific
electrical characteristics of these signals.
- VUNIQ
This signal is an open-collector output available for Vendor Unique usage. This
signal is not supported but meets the requirement of negating the signal while
the ID is being read.
- SEL2
Bit 2 of the binary coded SCSI ID selection input. This signal has a value of 0
when it is negated and a value of 4 when it is asserted for the purpose of
selection or arbitration.
This signal is latched within 250 msec of the application of valid power to the
drive or optionally the negation of -RST.
If SCSI ID SEL2 is intended, to be selected, the host must provide a low
impedance connection from - SEL2 to - SPSYNC or to ground, while the ID is
being latched, through an appropriate means. Refer to chapter 5 for specific
electrical characteristics of these signals.
- SPSYNC
This signal used to provide a spindle rotation synchronization reference. The
pins for all of the drives which are to be synchronized must be connected
together. The drives must be of like model to operate. The spindles are
synchronized using a "floating master" concept, where the drives will
synchronize to the first drive to reach full speed. The synchronization tolerance
is 1%.
This signal meets the requirement of negating the signal while the ID is being
read.