Embedded MultiMedia Card is one of the most widely used embedded storage solutions in automotive electronic systems. It integrates NAND flash memory and controller into a small BGA package, specifically enhanced for the harsh physical environment and long lifecycle requirements of automobiles.
Automotive Embedded eMMC Specifications
Brand
PG
Capacity
64GB / 128GB / 256GB
Write and Read Speed
Read Speed: 330MB/s, Write Speed: 240MB/s
Size
11.5x13x1.0 / 11.5x13x1.2
Protocol
eMMC 5.1, downward compatible to 3.1
Operating Temperature
-45°C to +105°C
Applications of Automotive Embedded eMMC
Automotive Embedded eMMC is widely distributed in multiple subsystems of automobiles, mainly responsible for storing operating systems, application programs, map data, and various sensor records.
Intelligent Cockpit and Information Entertainment System (IVI)
Operating System Storage: Stores system images such as Android Automotive, QNX, or Linux
Multimedia data: offline navigation maps, music, video buffering, and user personalized settings
Application software: various third-party programs downloaded from car app stores
Digital Instrument Cluster
Digital instruments require extremely high starting speed and stability
Fast Boot: The graphical interface of the eMMC storage instrument system ensures that the vehicle's speed, RPM, and warning icons are displayed within seconds after being powered on
Fault alarm record: Record key fault codes in the vehicle's operating status
Assisted Driving and Sensor Data (ADAS & EDR)
DVR and 360° panoramic: High frequency writing of video stream data is usually achieved using eMMC's pSLC partitioning technology to improve the erase life (Endurance)
Event Data Recording System (EDR): also known as the "car black box", records critical sensor data before and after a collision, requiring storage media to be able to retain data even under extreme impacts
Vehicle Networking Terminal (T-Box/V2X)
Remote information processing: storing firmware upgrade packages (OTA images) and communication protocol stacks
Cache management: When the network signal is poor, temporarily cache the diagnostic data uploaded by the vehicle