Datasheet

2-11
Memory Replacement Instructions for the Network Processing Engine or Network Services Engine and Input/Output Controller
OL-8358-03
Chapter 2 SDRAM and DRAM Memory Systems Overview
Network Processing Engine or Network Services Engine Memory Information
NPE-300 Memory Information
Use the following figure and tables for information about the NPE-300 memory location, specifications,
and configurations.
Note The NPE-300 contains two banks of SDRAM. Both SDRAM banks are used for all packet memory
requirements; however, bank 0 is used exclusively for packet memory and is set at a fixed configuration
in the factory.
Bank 1 contains two user-configurable SDRAM slots, DIMM slot 2 and DIMM slot 3. (See Figure 2-5.)
Both slots in bank 1 can be populated by DIMMs of different sizes; however, the size of the DIMM in
slot 2 must be greater than or equal to the size of the DIMM in slot 3, and the size of the DIMM in slot 3
can be zero.
Secondary cache 256 KB
(fixed)
— RM7000 processor unified, internal cache U38
Tertiary cache 4 MB (fixed) — RM7000 processor external cache U2, U26, U27, U28, U37
Table 2-10 NPE-400 SDRAM Configurable Memory
Total SDRAM Bank 1 Quantity Product Number
128 MB J1 1 128-MB SODIMM MEM-NPE-400-128MB
256 MB J1 1 256-MB SODIMM MEM-NPE-400-256MB
512 MB J1 1 512-MB SODIMM MEM-NPE-400-512MB
Table 2-9 NPE-400 Processor and Memory Specifications (continued)
Memory Type Size Quantity Description Component Location on the
NPE-400 Board