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296 Hardware Reference Manual
Intel
®
IXP2800 Network Processor
Media and Switch Fabric Interface
8.9.1.4 Single Network Processor Full Duplex Configuration (SPI-4.2)
The single Network Processor, full duplex configuration (SPI-4.2 only) allows a single Network
Processor to interface to multiple discrete devices, processing both the receiver and transmitter data
for each, as shown in Figure 105 (where N=255). Up to 256 devices can be addressed by the SPI-
4.2 implementation. The bridge chip implements the specific interfaces for each of those devices.
Figure 105. Single Network Processor, Full Duplex Configuration (SPI-4.2 Protocol)
B2743-01
Intel
®
IXP2800
Network
Processor
Bridge Chip
(Provides multiple interfaces
to other devices.)
Device N-1Device 1
Device NDevice 0
Full Duplex
SPI-4.2
Interface