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Hardware Reference Manual 297
Intel
®
IXP2800 Network Processor
Media and Switch Fabric Interface
8.9.1.5 Single Network Processor, Full Duplex Configuration
(SPI-4.2 and CSIX-L1)
The Single Network Processor, Full Duplex Configuration (SPI-4.2 and CSIX-L1 Protocol) allows
a single Network Processor to interface to a fabric via a CSIX-L1 interface and to multiple other
discrete devices, as shown in Figure 106. The CSIX-L1 and SPI-4.2 protocols are multiplexed on
the network processor receiver and transmitter interface. Independent processing and buffering
resources are allocated to each protocol.
8.9.2 System Configurations
The receiver and transmitter configurations in the preceding Section 8.9.1 enable several system
designs, as shown in Figure 107 through Figure 111.
Figure 106. Single Network Processor, Full Duplex Configuration (SPI-4.2 and CSIX-L1
Protocols)
B2744-01
Intel
®
IXP2800
Network
Processor
Bridge Chip
Device NDevice 1
Fabric
Interface
Chip
Device 0
Multiplexed
Full Duplex
SPI-4.2
and CSIX
Protocols
CSIX-L1
Interface
(A single CSIX protocol
instance is bridged to the
CSIX-L1 interface. The SPI-4.2
port addresses are mapped to
other devices.)