High-precision maps serve as the core infrastructure for autonomous driving systems, and their storage solutions must meet stringent requirements for fast read/write of centimeter-level precision data, long-term stability, and real-time updates. Currently, mainstream solutions adopt a “cloud-edge-end” collaborative architecture to optimize data distribution efficiency through layered storage. In this context, embedded multimedia cards (eMMC) have become the ideal choice for local storage of in-vehicle high-precision maps due to their high integration, balanced performance, and cost-effectiveness. Their built-in flash management mechanisms can effectively handle write wear caused by frequent map tile updates, while the execute-in-place (XIP) feature allows map data to run directly, significantly enhancing the real-time response of autonomous driving systems.
In autonomous driving systems, the 128GB automotive-grade eMMC provides critical local storage support for high-precision maps. This capacity can accommodate high-precision map data covering major urban areas (approximately 80-100GB), including static layers such as lane models, traffic signs, and slope curvature, while reserving buffer space for real-time dynamic data. Its core value lies in achieving a sequential read speed of 400MB/s in HS400 mode through the eMMC 5.1 interface, ensuring that map tile loading latency is below 50ms; the industrial-grade temperature range (-40℃~105℃) ensures data integrity in extreme environments; and the 100,000 erase/write cycles meet the frequency requirements for OTA map updates, significantly reducing the risk of system downtime due to storage failures. For example, in ramp access scenarios, high-precision maps need to provide curvature and slope parameters in real-time, and the high-speed reading capability of eMMC ensures that control commands are transmitted without delay, preventing the vehicle from deviating from its trajectory.
YEESTOR’s SGM8005J automotive-grade eMMC, with a capacity of 128GB and pSLC (pseudo-Single Level Cell) technology, offers a high-performance solution for high-precision map storage. This product features a BGA153 package (11.5×13.0×1.0mm), operating temperature range of -40℃~105℃, and complies with AEC-Q100 reliability standards. Its pSLC mode converts TLC flash memory into single-bit storage, increasing the erase/write lifespan to 30,000 cycles, far exceeding the 3,000 cycles benchmark of standard eMMCs, while maintaining dual voltage compatibility of 1.8V/3.3V and ≤1mW standby power consumption. Compared to industry standards, the SGM8005J demonstrates significant advantages in key parameters:
|
Parameter Category |
SGM8005J |
Typical Value for Industrial-grade eMMC |
Highlighted Advantages |
|
Storage Capacity |
128GB (pSLC mode) |
128GB (TLC mode) |
10 times lifespan improvement at the same capacity |
|
Erase/Write Lifespan |
30,000 P/E cycles |
3,000 P/E cycles |
Supports more frequent map updates, extending product lifecycle |
|
Read Speed |
400MB/s (HS400 mode) |
250-300MB/s |
Accelerates map data loading, enhancing system response |
|
Temperature Range |
-40℃~105℃ |
-40℃~85℃ |
Adapts to high-temperature environments such as engine compartments |
|
Power Management |
Standby ≤1mW, supports deep power-down |
Standby 3-5mW |
Reduces overall system energy consumption |
This chip integrates intelligent wear leveling algorithms and power loss protection mechanisms, allowing for cache data to be written back within milliseconds during sudden power outages, preventing map data corruption. Its error correction capability supports correcting 120-bit errors per 1KB of data, improving fault tolerance by 20% compared to traditional LDPC schemes. Through the official authorized distributor Mandu Technology, customers can receive full-cycle technical support, including chip selection adaptation, signal integrity simulation, free sample provision, and customized firmware development services, effectively shortening the product launch cycle. For developers committed to building high-reliability high-precision map storage systems, the YEESTOR SGM8005J eMMC, with its long lifespan brought by pSLC technology, automotive-grade environmental adaptability, and high-speed data throughput capability, becomes the ideal storage foundation supporting L3 and above autonomous driving functions. Its domestic solution not only avoids supply chain risks but also provides rapid response support through Mandu Technology’s localized service network, helping customers seize technological advantages in the wave of intelligent connected vehicles.
About Mandu Technology
Shenzhen Mandu Technology Co., Ltd. has always focused on high-performance, high-quality, and high-reliability integrated circuit product agency, including storage chips, differential oscillators, and MCU microcontroller products, and gradually develops integrated analog signal chain products to provide customers with comprehensive high-cost performance solutions. Its application range covers numerous fields including network communication, industrial control, robotics, medical devices, and personal health.
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