Cisco 7500 Series Configuration Manual page 54

Route Switch Processor Overview
Figure 1-20
MEMD
SRAM
MEMD
SRAM
The RSP2 contains the system CPU, the system software (in Flash memory), the system memory
components, and two PC Card slots, formerly called Personal Computer Memory Card International
Association (PCMCIA) slots, and it maintains and executes the management functions that control the
system.
Although no monitoring of ±12V or temperature is done by the RSP2, a comparator device ensures that
±12V is maintained within the normal operating ranges, and three temperature sensors on the RSP2 send
temperature information to the chassis interface (CI) card. The CI card reports all voltage and
temperature readings, and these readings are available through standard software commands for
environmental monitoring.
The RSP2 uses a software-controlled configuration register, so you do not have to remove the RSP2 to
configure jumpers. There are no user-configurable jumpers on the RSP2.
The RSP2 contains the following components:
R4600— Reduced Instruction Set Computing (RISC) processor, used for the CPU. The CPU runs at
•
an external clock speed of 50 MHz and an internal clock speed of 100 MHz.
• Most of the memory components used by the system, including onboard Flash memory. (A bank of
hardware [MAC-layer] addresses for the interface ports is contained in an NVRAM device on the
backplane.)
• Air-temperature sensors for environmental monitoring. (All of the logic for the environmental
monitoring functions is contained on the chassis interface card.)
In addition to the system software, the RSP2 contains and executes the following management functions
that control the system:
• Sending and receiving routing protocol updates.
• Managing tables and caches.
Monitoring interface and environmental status.
•
Cisco 7500 Series Installation and Configuration Guide
1-32
Route Switch Processor (RSP2)
SIMMs
Bus connector
U1
PC Card slots Flash memory
slot 0: bottom SIMM holder
slot 1: top
Chapter 1
DRAM
U33
U30
U21
U12
U18
U4
Auxiliary port
Cisco 7500 Series Product Overview
CPU
Bank 0
ROM monitor
(boot ROM)
NVRAM
Bank 1
Console port
OL-5008-03 B0