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I/O Processor
I/O Processor
System unit (PCI) and migration tower (PCI and SPD) I/O Processors for processors 270,
8xx, SB2, and SB3 and associated towers are discussed in this chapter.
V4R5 System Unit Hardware (PCI)
Embedded 32 MB PCI IOP (CCIN 284x)
On the Model 270, a 32 MB PCI IOP is embedded on the CEC backplane. For the #2248,
#2250, and #2422 processors, the embedded IOP is CCIN 284D. For the other Model 270
processors, the embedded IOP is CCIN 284E.
On the Model 820, a 32 MB PCI IOP (CCIN 284C) is embedded on the backplane.
The #5075 contains a 32 MB PCI IOP (CCIN 284B) embedded on its backplane.
#2842 PCI IOP
The #2842 is an I/O processor with 32 MB of memory that drives PCI IOA adapters on the
Model 270 and on the #5075 PCI Expansion Tower (when attached to a Model 270). Up to
two feature #2842 PCI IOPs may be added to the Model 270.
The #5075 PCI Expansion Tower has a 32 MB PCI IOP (CCIN 284B) embedded on the
backplane. When the #5075 is attached a Model 270, up to three feature #2842 PCI IOPs
may be added to the #5075.
The following IOAs are supported by the embedded PCI IOP (Model 270 and #5075) and the
#2842 PCI IOP:
• #2743 - PCI 1 Gbps Ethernet IOA
• #2744 - PCI 100 Mbps Token Ring IOA
• #2749 - PCI Ultra Magnetic Media Controller
• #2763 - PCI RAID Disk Unit Controller
• #2768 - PCI Magnetic Media Controller
• #4723 - PCI Ethernet/IEEE 802.3 Adapter
• #4745 - PCI WAN IOA
• #4746 - PCI Twinaxial IOA
PCI configuration rules for V4R5 hardware are quite flexible. Please see “PCI Card
Placement Rules” on page 279 for the complete rules.
Note
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