C
URTISS
-W
RIGHT
P
RE
-I
NSTALLATION
T
ASKS
826448 V
ERSION
5 M
ARCH
2015
P
ROPRIETARY
2-5
The XMC site provides traditional PMC I/O, single ended XMC I/O, and high-speed differential
XMC I/O. The traditional PMC I/O consists of 64 bits of I/O that are differentially routed
between the XMC J14 connector and the CHAMP-AV8 backplane P3 connector.
The CHAMP-AV8 utilizes a 10 mm XMC stacking height.
Mezzanine Module
Power
Considerations
The CHAMP-AV8 supplies voltages to the XMC site according to VITA 42. The supplied voltages
are listed in Table 2.2, along with their maximum supply currents. These maximum supply
currents are specified by VITA 42 at 1 Ampere per XMC connector pin. The CHAMP-AV8 is
capable of providing these currents.
Performance of the CHAMP-AV8 may be impacted by a specific XMC card installed on the XMC
site. Heat dissipated by the XMC will raise the temperature of CHAMP-AV8 basecard
components. At elevated inlet air or card edge temperature, the CHAMP-AV8's
microprocessors may throttle, reducing performance. Although the CHAMP-AV8 supports high
wattage XMC cards and is designed to supply maximum current according to the VITA 42
standard, the thermal impact on the basecard should be assessed.
Caution
When installing an XMC on the CHAMP-AV8, careful characterization of the XMC
performance should be done. Technical Support may also be consulted. Depending on the
particular application and configuration, various conditions can occur that could adversely
affect (and possibly extend oustide of the product specification) the baseboard, XMC, or
chassis. These conditions include, but are not limited to excessive heating of baseboard and
XMC components. Factors affecting this include, but are not limited to: maximum operating
temperature of the board (air temperature for air-cooled boards and card edge temperature
for conduction-cooled boards), airflow (air-cooled boards), baseboard power dissipation
(application specific), and the location and density of the hot components on the XMC and/or
the baseboard.
Depending upon application usage, the CHAMP-AV8 may require operational derating when
used in conjunction with a mezzanine. Consult the factory for guidance.
Table 2.2:
Maximum Supply Current for XMC Site
Supply
Maximum Supply Current
12 VPWR
8A
3.3V_AUX
1A
3.3V
4A
+12V
1A
-12V
1A
Note
The use of a mezzanine may induce lowered CPU performance at elevated temperatures.
Consult the factory for guidance.
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