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ATCA-C110/1G Installation and Use Manual
Chapter 4 Functional Description
46
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PCI-Express to PCI Bridge
The PCI-to-PCI-Express Bridge acts as the interface between the FIM (through its PCI-Express
interface) and the Processor of the ATCA-C110. The PCI-Express to PCI Bridge supports full
forward and reverse transparent bridging applications.
The FIM of the ATCA-C110 uses PCI-Express to PCI Bridge in the forward bridging mode to
allow the PCI configuration register access through PCI-Express interface. The Internal Arbiter
of the bridge is also utilized for arbitration on the PCI bus. The PCI bus operates in 32-bit
66 MHz mode.
Ethernet Switching Fabric
The Ethernet switching fabric on the FIM of the ATCA-C110 is a 24 port GbE switch from
Broadcom used for multilayer switching applications. This switching fabric is a complete IPv6-
enabled Layer 2 and Layer 3 switch-on-chip solution.
SATA Multiplexer
The SATA Multiplexer on the FIM of the ATCA-C110 is a four channel bi-directional 2:1
SATA/SAS Mux/Demux supporting both 1.5 and 3.0 Gbps standard rates, transparently passing
through Out-of-Band signaling. Each of the four channels operates independently.
The SATA Multiplexer is used to route the SATA interfaces from the host AMC Bays to the
storage Bays and also to the RTM. This functionality is under software control and is
programmable, allowing flexible AMC interfacing between two AMC bays.
I
2
C Bus Interface
The I
2
C bus devices have been listed in Table 6-4 on page 74 along with the main carrier board
I
2
C devices.
AMC Bay3 Link x4 Station 0 Lane [12:15]
AMC Bay4 Link x4 Station 1 Lane [28:31]
PEX8114 Link x4 Station 1 Lane [16:19]
PEX8111 Link x1 Station 1 Lane [20]
Table 4-2. Port Configuration on PCI-Express Switch (continued)
Link Link Width Station Lanes