Cisco NPE-175 Installation And Configuration Manual page 18

NPE-100, NPE-150, and NPE-200 Description and Overview
Figure 1-3
1
2
3
1 System controller
2 R5000 microprocessor
3 4-MB SRAM (U6, U10, U13, U14, U28, U29,
U38, and U39)
4 Captive installation screw
5 Handle
6 Temperature sensor
The NPE-100, NPE-150, and NPE-200 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-150 and NPE-200 have a system controller that uses
direct memory access (DMA) to transfer data between DRAM and packet SRAM on the network
processing engine.
Network Processing Engine and Network Services Engine Installation and Configuration
1-4
NPE-200
4
5
The NPE-100 and NPE-150 have an R4700 microprocessor that operates at an internal clock
speed of 150 MHz.
The NPE-200 has an R5000 microprocessor that operates at an internal clock speed of
200 MHz.
Chapter 1 NPE-100, NPE-150, and NPE-200 Overview
U52
U42
U25
6
7 Midplane connectors
8 Temperature sensor
9 Boot ROM U92
10 DRAM SIMMs
11 Bank 1
12 Bank 0
7
8
9
10
11
12
U11
OL-4448-12