Contents
How does DDR3 routing work on a PCB?
DDR3 routing isn’t for the faint-hearted as you’ll be dealing with multiple high-speed traces on a crowded PCB. Here are some tips that will help you out. On the DIMM DDR3 SDRAM, there are individual modules that are connected by the data strobes, often referred to as lanes. Each lane corresponds to 8 bits of the data bus.
What are the guidelines for DDR2 SDRAM boards?
DDR2 and DDR3 SDRAM Board Design Guidelines This chapter provides guidelines on how to improve the signal integrity of your system and layout guidelines to help you successfully implement a DDR2 or DDR3 SDRAM interface on your system.
Which is the priority signal in DDR3 routing?
Routing priority should be given to data signals. You’ll want to start by routing the grouped data signals from the microprocessor to the DDR3 RAM before moving on to address, and other control signals. The clock signal is routed last.
What’s the data bus frequency for DDR3 SDRAM?
A DDR3 SDRAM supports data bus frequency of up to 1066MHz. However, data transfer between the memory chip and a microcontroller happens at twice the clock rate.
What are the routing guidelines for DDR3 SDRAM?
Routing Guidelines for DDR3 1 Establish Data Grouping. On the DIMM DDR3 SDRAM, there are individual modules that are connected by the data strobes, often referred to as lanes. 2 Route Data Signals First. Routing priority should be given to data signals. 3 Use Minimal Or Equal Amount Of Vias. 4 Route Signal Traces Adjacent To Ground.
Why is precision important in DDR memory routing?
PCB designers need to use precision in their routing of the memory circuitry in order to meet the performance specifications. The most important thing in routing DDR memory is meeting its timing specifications.
Which is the best CAD editor for DDR4?
The CAD features in Altium Designer’s PCB Editor make it easy to create your DDR3 or DDR4 layout to ensure signal integrity and ease of routing. To learn more about fly-by topology routing for your DDR3 and DDR4 memory devices, talk to an expert at Altium.