User`s guide

Introduction • 7
1.3.4 Processor
The cPCI-6810/6820 motherboard is based on the RCC/ServerWorks
Champion LE chipset and supports a single or dual Intel Mobile Pentium III
processor – M. The supported CPU package is a micro-FCBGA.
The Mobile Intel Pentium III Processor is a 0.18-micron product, which is a
highly integrated assembly with all its immediate system-level support. This
mobile version of the Pentium III processor runs at a lower voltage than the
desktop version.
The 256 KB on-die transfer L2 cache is integrated with the CPU, eliminating
the need for separate components and improving performance. The Mobile
Intel Pentium III Processor also operates with a 100/133 MHz Front Side Bus
for faster access to memory and data. The FSB speed depends on the CPU
type with its core speed automatically detected by the BIOS.
1.3.5 Supported Memory
The cPCI-6810/6820 supports PC100/PC133 registered SO-DIMMs only. The
SDRAM speed, type and size can be determined by the BIOS reading the
DIMM presence detect bits on the SMBus. The DRAM timing register, which
provides the DRAM speed control for the entire array, must be programmed to
use the parameters of the slowest installed SDRAM. The DRAM interface
supports 64Mbit, 128Mbit, and 256Mbit technology, allowing up to 512Mbytes
per double-sided SO-DIMM. The cPCI-6810/6820 can support up to 2GB of
SDRAM memory with four 144-pin SO-DIMMs. Refer to table below for
memory size configurations according to model type.
cPCI-6810 cPCI-6820
Model #
AA AB AC AD AE
Memory sockets Single x2 Single x2
Single +
Dual
Single +
Dual
Dual x2
Max.
SO-DIMM#
2 2 3 3 4
Max. Memory 1 GB 1 GB 1.5 GB 1.5 GB 2 GB
Table 1: cPCI-6810/6820 Memory Configurations