Mobile DDR and DDR2 Support for Sitara AM335x Designs
Kozio announced VTOS DDR™ support for Mobile DDR and DDR2 memories used with Sitara AM335x board designs. Mobile DDR is also known as mDDR, Low Power DDR, or LPDDR. It is a type of DDR SDRAM for mobile computers. VTOS DDR™ is a low-cost software product that provides everything you need to configure, verify, and tune the DDR memory on your board design.
VTOS DDR provides a pre-built firmware image that runs out of on-chip memory, delivering a fast and stable platform for adjusting and tuning DDR and DDR PHY settings. Integrated with the firmware is a task-focused user interface, guiding the user through all steps needed to find optimal DDR settings specific to an SoC, board, and memory part. A proven and advanced set of memory tests allow you to verify new settings in seconds, or kick off long regression tests. When it is time to run burn-in, or test multiple devices, an API is provided for integration with your favorite test executive.
VTOS DDR also provides a routine called “am335.phy.tuning” to perform DDR PHY software leveling to determine the optimum PHY tuning parameters. The PHY Software Leveling requires seed values. For mDDR, we recommend using TI’s RatioSeed_AM335x_boards.xls spreadsheet to determine the seed values. The spreadsheet can be downloaded from the TI Processor Wiki portal: http://processors.wiki.ti.com/images/e/e6/RatioSeed_AM335x_boards.zip.
Application notes are available for each processor family. Learn more about this DDR test solution at www.kozio.com/vtos-ddr.