Recent IoT devices require durable batteries and ultra-fast data processing. To achieve this, on-board RAM needs to operate efficiently by using the lowest possible power consumption. Low Power SDR SDRAM integrates energy-saving technologies, allowing IoT devices to operate at optimal levels for longer periods of time.
The operation of Low Power SDR SDRAM (Single-Data-Rate Synchronous- DRAM) is similar to that of traditional SDRAM. Data transfer is achieved through a finite state machine that channels clock signals. Like regular SDRAM, Low Power SDRAM allows for command channeling, where new commands are received while ongoing tasks are being processed. Low Power SDRAM also integrates various features designed to minimize power consumption during both idle and active periods.
Winbond’s Low power SDR SDRAM product family is designed with specific features to reduce power consumption, below are the features.
Partial Array Self Refresh (PASR):
In handheld devices, a unique refresh mechanism called Partial Array Self-Refresh (PASR) is adopted to achieve power saving. Before the adoption of this refresh method, every refresh involved refreshing all memory ICs. With PASR technology, the memory can be refreshed on a per-bank basis, rather than whole fresh. It can reduce the overall power consumption of the memory.
Auto Temperature Compensated Self Refresh (ATCSR):
This feature involves embedding temperature sensors in the memory. Since refreshing the memory will cause its temperature to rise, continuous refreshing will inevitably increase power consumption. Therefore, the ATCSR helps memory chips by automatically reducing the frequency of refreshing when the memory temperature exceeds a pre-set value, giving the memory a chance to cool down and improving power efficiency.
Other ultra-low power Modes:
Winbond Low Power SDR SDRAM provides some power saving modes to reduce power consumption, like Power-down mode, Deep power-down mode, Programmable output buffer driving strength. It supports Winbond’s DSR (Deep Self-Refresh) and HSM (Hybrid Sleep Mode) as well.
The Low Power SDR SDRAM is designed for mobile devices. It aimed the markets of Smart phones, Digital cameras, GPS devices, and handheld devices relevance.
In the mobile phones and other IoT devices, it will continue to expend power even when they are in a stationary state, waiting to execute various applications.
The intelligent Low Power SDR SDRAM allows phones to adjust their processing power and power usage based on the data that needs to be processed. This enables them to significantly extend battery life and improve overall energy efficiency.