Artesyn ATCA-8310 Installation and Use (May 2014) - Manual (Page 90)

Functional Description
ATCA-8310 Installation and Use (6806800M72E) 90
4.5.1 Ethernet Network Overview
The Ethernet Switching Unit on the ATCA-8310 provides following interfaces:
 One 1000Base-BX interfaces to the Update Channel 0
 Redundant connections to the PICMG 3.0 Base Interface
 Redundant connections to the PICMG 3.1, option 9 Fabric Interface.
 Redundant connections to a 10GBase-KX4 Fabric Interface
4.5.2 ETH Switch Unit
4.5.2.1 Ethernet Switch Device
The ATCA-8310 contains a BCM56624, which is a highly integrated Gigabit Ethernet switch
with 10G uplink capability.
The interfaces to the host CPU via the PCI express bus of the Freescale P4080. High end
switching systems use the PCI express interfaces for setup, configuration, maintenance, and
management of the BCM56624 Switch. In high-end systems, requiring the host CPU running
routing protocol stacks, PCI express bus is necessary for moving data packets to and from CPU.
For ATCA-8310, the BCM56624 provides switching between any on-board Ethernet port and
the backplane interfaces (ATCA Base- and Fabric-interface).
4.5.2.2 Switch management
The switch device is managed by the SPP, Freescale P4080. Therefore the switch is connected
to the SPP via a two line PCIe interface, running at 2.5Gb.
4.5.2.3 PHY connection
The MIIM_MDx_[1] interface is not connected.
The MIIM_MDx_[0] interface is routed to the Zone 3 as well as the MIIM_XG_MDx interface
which is run at 2.5V (MIIM_XG_VDDO=2.5V). Both interfaces are 3.3V tolerant.