Components - Cisco NPE-175 Installation And Configuration Manual

Chapter 2 NPE-175 and NPE-225 Overview
Figure 2-2
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Network controller board
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System controller
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Processor engine board
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Captive installation screw
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RM5271 microprocessor
The NPE-175 and NPE-225 consist of the following components:
• Reduced instruction set computing (RISC) microprocessor
System controller
•
The system controller provides hardware logic to interconnect the processor, DRAM, and the
PCI-based system backplane bus. The NPE-175 and NPE-225 have one system controller that
provides processor access to the two midplane and single I/O controller peripheral component
interconnect (PCI) buses. The system controller also allows port adapters—on either of the two
midplane PCI buses—access to SDRAM.
Upgradable memory modules
•
The NPE-175 and NPE-225 use SDRAM for providing code, data, and packet storage.
Cache memory
•
The NPE-175 and NPE-225 have unified cache SRAM that functions as the secondary cache for the
microprocessor. (The primary cache is within the microprocessor.)
Two environmental sensors for monitoring the cooling air as it leaves the chassis
•
OL-4448-12
NPE-225
4 5
The NPE-175 has an RM5270 microprocessor that operates at an internal clock speed of
–
200 MHz.
– The NPE-225 has an RM5271 microprocessor that operates at an internal clock speed of
262 MHz.
Network Processing Engine and Network Services Engine Installation and Configuration
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Handle
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Midplane connectors
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Boot ROM (U1)
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Temperature sensor
10 SDRAM DIMM (U15)
NPE-175 and NPE-225 Description and Overview
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