User Manual ~
UNIVERSAL PCI BUS EXTENDER
Model PCIEXT64U and PCIEXT64UB
1/18/2007-
REV F
COPYRIGHT C 2007
ULTRAVIEW CORP. (925) 253-2960 www.ultraviewcorp.com
ON
Power Limit Switch:
The POWER LIMIT switch allows selection of a power
limit value of 15, 25 or 35 watts. For example, if set to
25W, the PCIEXT64U or UB will limit the +3.3V, +5V
and VIO current if the UUT draws more than 25 watts
total on its +3.3V, +5V and VIO power pins.
Note that
the 35 W setting is above the maximum per-slot
power (25 W) allowed by the PCI specification. Also,
the +/-12V power is not protected from overloads.
Current Measurement Test Points:
The PCIEXT64U and UB allow real-time measurement
of power consumption during board operation. A
volt
meter or scope can be connected with its “+” lead to
either the 5I, 3.3I or VIO white test points, and its “-“
lead to the black GND test point. The voltage output on
these
test
points
has
a
1:1
Volt-to-Ampere
correspondence. Hence, a reading of 2.4V on the 5I test
point indicates that the UUT is drawing 2.4
amperes
from the 5V supply.
Live (Hot) Insertion:
The Live Insertion capability is enabled by first saving
the UUT’s configuration register contents, using the live
insertion software provided, and then switching the Slot
Power switch off, which removes power and isolates all
signals to the connector of the UUT.
With the Slot Power switch off, a user can then remove
or insert the UUT, or insert a new UUT of the same type,
without the need to power the host system off. The plug-
in UUT may be modified or swapped without powering
down the host system.
Then, with the replaced UUT (of same type as old)
installed, the slot power switch may be turned on again.
Switching on Slot Power will require the UUT
configuration register contents to be reinitialized to
operate correctly, again using the live insertion software
provided, as described in the section “Live Insertion
Software” These configuration registers need to be
initialized prior to re-accessing the board.
