Cisco 7200 VXR router User Manual page 32

Field-Replaceable Units
Table 1-2 Network Processing Engine Memory Specifications (Continued)
Memory Type Size
SRAM
NPE-150 1 MB
NPE-200 4 MB
3
Boot ROM
NPE-200 256 KB
Unified cache 512 KB
1 The sockets for bank 0 on the NPE-100 and the NPE-150 are numbered U18 and U25. The same sockets on the NPE-200 are
numbered U11 and U25.
2 The sockets for bank 1 on the NPE-100 and the NPE-150 are numbered U4 and U12. The same sockets on the NPE-200 are
numbered U42 and U52.
3 ROM = read-only memory. The NPE-100 and NPE-150 use the boot ROM present on the I/O controller.
Note
your system initializes correctly at startup, DRAM bank 0 (socket U18 and U25, or U11
and U25) must contain no fewer than two SIMMs of the same type. You may also install
two SIMMs of the same type in bank 1 (socket U4 and U12, or U42 and U52); however,
bank 0 must always contain the two largest SIMMs.
Table 1-3 lists the NPE-175 and NPE-225 memory specifications.
1-22 Cisco 7200 VXR Installation and Configuration Guide
Quantity Description
8 8 chips, each being 128K words x
9 bits wide
8 8 chips, each being 512K words x
8 bits wide
1 EPROM for the ROM monitor
program
4 Secondary cache for the R4700
Secondary cache for the R5000
To prevent DRAM errors in the NPE-100, NPE-150, or NPE-200, and to ensure that
Location
U700 through U703
U800 through U803
U6, U10, U13, U14, U28,
U29, U38, and U39
Socket U92
NPE-100 and NPE-150
U2, U10, U14, and U26
NPE-200
U16, U9, U109, and U107