VPX4810 PCIe PMC/XMC 3U Carrier
USER’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 23 -
http://www.acromag.com
- 23 -
www.acromag.com
THEORY OF OPERATION
Operation of the VPX4810
The VPX4810 bus carrier can be connected as a Double Fat Pipe (PCIe x8) device, but will also link properly to
smaller width connections. The PCIe bus is then routed to a switch that then automatically connects via 4 or 8
lanes to the XMC module. Alternatively if a PMC module is used, the switch instead uses a connection to a PCIe
to PCI-X Bridge that converts the bus signals. The PMC/XMC rear I/O is routed from the J4 connector to the
VPX P2 connector.
Due to a BIOS limitation on the XVPX-6300, when used with this CPU module the installed PMC/XMC card
may not boot properly when connected to Fat Pipe B. They will function normally from inside an operating
system. These devices will boot normally if connected to Fat Pipe A
I2C Bus and Temperature sensor
There is one I2C bus to access the FRU (Field Replaceable Unit). Information such as board module number,
part number and revision level can be stored in this location. This device also will report board temperature
from a thermocouple on the board. Please contact the factory for further information on the bus operation.
