3. Dual-DIMM DDR2 and DDR3 SDRAM Board Design Guidelines
The following topics discuss the impact on signal integrity of the data signal with the following conditions in a dual-DIMM configuration:
- Populating just one slot versus populating both slots
- Populating slot 1 versus slot 2 when only one DIMM is used
- On-die termination (ODT) setting of 75-ohm versus an ODT setting of 150-ohm
For detailed information about a single-DIMM DDR2 SDRAM interface, refer to the DDR2 and DDR3 SDRAM Board Design Guidelines chapter.
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