![]() ![]() Mobile products do not operate constantly, so power management targets two areas: active power (power consumed while the product is in use) and standby power (power consumed while the product is on but inactive). Multi-tasking applications demand higher bandwidth from the DDR-SDRAM subsystem, which often translates to a faster clock rate that requires more power. Even though battery technology is dramatically improving, the desire to support multi-tasking applications increases the power requirement. The less power the product consumes, the longer it can operate before the user must recharge the battery. Power management is a primary concern in mobile-product designs because battery capacity limits the product's available source energy. Designers can build a complete DDR subsystem that balances power and performance requirements by drawing on their application knowledge and taking advantage of available DDR SDRAM power-management features. Whether the design is for mobile or wired applications, it is critical that designers optimize their DDR-SDRAM subsystems to manage power consumption while maximizing system performance. DDR (double-data-rate) SDRAM, the most cost-effective off-chip memory, is the memory of choice to meet the increasing bandwidth needs of today's SoCs.ĭDR-SDRAM subsystems offer cost and performance benefits, but higher performance usually translates to increased power consumption. SoCs with more features and performance typically operate with higher clock frequencies, which require faster access and greater bandwidth to memory. To deliver new features and higher performance in consumer-electronic products, SoC developers constantly look to integrate more functionality into their designs. ![]()
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