Explore How AP Memory PSRAM Optimizes AR/VR Device Performance.

In AR/VR wearable devices, achieving a low-latency, highly immersive visual experience requires the display system to process high-resolution rendered images and sensor data in real time. Mainstream solutions adopt a "Host SoC + Display Cache + Sensor Fusion" architecture, where the performance of the display cache unit directly determines image latency and motion blur control. Pseudo SRAM (PSRAM), with its high bandwidth, low pin count, and interface timing similar to SRAM, has become the ideal choice balancing performance and cost. It eliminates the need for complex refresh control logic, simplifying PCB layout and driver design, and provides a necessary high-speed data buffering channel for high refresh rate displays (e.g., 90Hz/120Hz) under limited space and power budgets.

In AR/VR devices, a 64Mb PSRAM is often used as a dedicated frame buffer for the Display Controller or a high-speed buffer for sensor data. Its core function is to temporarily store the next frame of data to be displayed, bridging the speed gap between SoC rendering and screen scanning, thereby eliminating screen tearing. Its advantages lie in three aspects: first, a clock frequency of 200MHz or higher provides sufficient bandwidth to support the data throughput for single-eye 2K@120fps; second, it has lower static power consumption compared to traditional Mobile DRAM, effectively controlling device heat; third, its x32-bit wide interface can transfer more data per clock cycle, significantly reducing the access load on the host SoC and overall system power consumption, laying the foundation for a long battery life experience.

AP Memory's APS6404L-SQH-SN is a high-performance 64Mb PSRAM, operating at 1.8V and housed in a standard SOP-8 package, supporting an x4 data bus. This device is optimized for space- and power-sensitive wearable applications and demonstrates significant advantages in AR/VR use cases. Compared to alternative solutions, its key parameters are contrasted below:

The chip features a built-in self-refresh circuit, maintaining data without external controller intervention. Its deep power-down mode can reduce power consumption to below the microampere level. In AR/VR systems, the APS6404L-SQH-SN can directly connect to the PSRAM interface of the display driver IC or host SoC. Its high-speed access characteristics ensure delay-free screen refresh. As an official authorized distributor of AP Memory, MANDU provides AR/VR device manufacturers with full-process support—from chip selection and signal integrity (SI) simulation to PCB layout guidance and free sample applications. Its localized technical service team can respond quickly to customer needs, helping accelerate product time-to-market.

For AR/VR device designers pursuing ultimate display performance and energy efficiency, the AP Memory APS6404L-SQH-SN PSRAM, with its high performance, low power consumption, and high reliability, is a key component for building a smooth, nausea-free visual experience system. Its industrial-grade quality ensures the device's long-term stable operation in complex application scenarios.

About Mandu Technology

Shenzhen Mandu Technology Co., Ltd. has steadfastly centered its operations on the distribution of high-performance, high-quality, and highly reliable integrated circuit products. Its portfolio encompasses memory chips, differential crystal oscillators, and MCU microcontrollers, while progressively integrating analog signal chain products. The company prides itself on delivering comprehensive and cost-effective solutions to its customers. Its products find applications across a broad spectrum of industries, including but not limited to network communication, industrial control, robotics, medical equipment, personal health, and numerous other fields.

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