Specifications

smartModule Express SMX945 / Memory Specification
www.kontron.com 34
6 Memory Specification
This chapter describes the SMX945 system memory interface for DDR2 memory. The SMX945 supports only DDR2
memory and either one of the following SODIMMs.
» Dual Channel Asymmetric for DDR2 400/533/667 MHz devices
» Dual Channel Symmetric for DDR2 400/533/667 MHz devices
System Memory Organization Support for DDR2
Technology Width Page Size Banks Smallest Increments Largest Increments
Maximum Capacity
(1 DS SODIMM)
256Mbit X8 8k 4 256MB 512MB 512MB
256Mbit X16 4k 4 128MB 256MB 256MB
512Mbit X8 8k 4 512MB 1GB 1GB
512Mbit X16 8k 4 256MB 512MB 512MB
1Gbit X8 8k 8 1GB 2GB 2GB
1Gbit X16 8K 8 512MB 1GB 1GB
DDR2 Supported Configurations
Technology Configuration
# of Rows
Address Bits
# of Columns
Address Bits
# of Banks
Address Bits
Page Size Rank Size
256Mbit 16M X 16 13 9 2 4 k 128MB
256Mbit 32M X 8 13 10 2 8 k 256MB
512Mbit 32M X 16 13 10 2 8 k 256MB
512Mbit 64M X 8 13 11 2 16 k 512MB
512Mbit 64M X 8 14 10 2 8 k 512MB
1Gbit 64M X 16 14 10 2 8 k 512MB
1Gbit 128M X 8 14 11 2 16 k 1GB
1Gbit 64M X 16 13 10 3 8 k 512MB
1Gbit 128M X 8 14 10 3 8 k 1GB
Supported SO-DIMM types:
GMCH supports DDR2-SDRAM 200pin up-buffered SODIMMs specified in the JEDEC DDR2 SODIMM specification:
Non-ECC, single-sided, x 16 width
Non-ECC, single-sided, x 8 width
Non-ECC, double-sided, x 16 width
Non-ECC, double-sided, x 8 width (stacked)