As a core infrastructure for autonomous driving systems, the storage solution for high-precision maps (HD maps) must meet stringent requirements including fast read/write operations for centimeter-level accuracy data, long-term stable retention, and real-time updates. The current mainstream approach utilizes a "cloud-edge-device" collaborative architecture, which optimizes data distribution efficiency through tiered storage. Against this backdrop, embedded MultiMediaCards (eMMC) have emerged as an ideal choice for local storage of onboard high-precision maps, owing to their high level of integration, balanced performance, and cost-effectiveness. Their built-in flash management mechanisms effectively handle write wear caused by frequent map tile updates, while the execute-in-place (XIP) capability supports direct execution of map data, significantly enhancing the real-time responsiveness of the autonomous driving system.
Within the autonomous driving system, a 128GB automotive-grade eMMC provides crucial local storage support for high-precision maps. This capacity is sufficient to store high-precision map data covering major urban areas (approximately 80-100GB), including static layers such as lane models, traffic signs, slope and curvature information, while also reserving buffer space for real-time dynamic data. Its core value lies in: achieving sequential read speeds of up to 400MB/s through the HS400 mode of the eMMC 5.1 interface, ensuring map tile loading latency below 50ms; an industrial temperature range (-40°C to 105°C) guaranteeing data integrity under extreme environmental conditions; and an endurance of 10,000 program-erase cycles meeting the demands of OTA map update frequencies, significantly reducing system failure risks due to storage issues. For instance, in scenarios like ramp navigation, where the high-precision map must provide real-time curvature and slope parameters, the high read speed of the eMMC ensures control commands are delivered without delay, preventing the vehicle from deviating from its trajectory.
YEESTOR's SGM8005J automotive-grade eMMC, with its 128GB capacity and pSLC (pseudo Single-Level Cell) technology, offers a high-performance storage solution for high-precision maps. This product utilizes a BGA153 package (11.5×13.0×1.0mm), operates within a temperature range of -40°C to 105°C, and complies with the AEC-Q100 reliability standard. Its pSLC mode converts TLC NAND flash to single-bit storage, increasing the endurance to 30,000 P/E cycles, far exceeding the typical 3,000 cycles of standard eMMCs, while maintaining compatibility with 1.8V/3.3V dual voltages and standby power consumption of ≤1mW. Compared to industry standards, the SGM8005J demonstrates significant advantages in key parameters:
Parameter Category | SGM8005J | Typical Industrial eMMC | Advantage Highlight |
Storage Capacity | 128GB (pSLC mode) | 128GB (TLC mode) | 10x longer lifespan at equivalent capacity |
Endurance (P/E Cycles) | 30,000 | 3,000 | Supports more frequent map updates, extends product lifecycle |
Read Speed | 400MB/s (HS400 mode) | 250-300MB/s | Accelerates map data loading, improves system response |
Temperature Range | -40°C~105°C | -40°C~85°C | Suitable for high-temperature environments like engine compartments |
Power Management | Standby ≤1mW, supports deep power-down | Standby 3-5mW | Reduces overall system energy consumption |
The chip integrates intelligent wear-leveling algorithms and power-off protection mechanisms, enabling millisecond-level cache data write-back during sudden power loss to prevent map data corruption. Its error correction capability can handle up to 120-bit errors per 1KB of data, representing a 20% improvement in fault tolerance compared to traditional LDPC schemes. Through MANDU Technology, the official authorized distributor of YEESTOR, customers can receive full-cycle technical support, including chip selection and adaptation, signal integrity simulation, free sample provision, and customized firmware development services, effectively shortening the product development cycle.
For developers aiming to build highly reliable high-precision map storage systems, the YEESTOR SGM8005J eMMC, with its long lifespan enabled by pSLC technology, automotive-grade environmental adaptability, and high-speed data throughput, serves as an ideal storage cornerstone for supporting autonomous driving functions at L3 level and above. This localized solution not only mitigates supply chain risks but also, through MANDU Technology's local service network, provides rapid response support, helping customers gain a technological edge in the wave of intelligent connected vehicles.
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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