Automotive Infotainment Storage Solution

Application

Description

Comprehensive automotive-grade storage solution using Longsys AEC-Q100 qualified eMMC and UFS products for infotainment, ADAS, and telematics applications

Core Advantages

Automotive Reliability AEC-Q100 Grade 2 qualification ensures reliable operation in harsh automotive environments with wide temperature ranges and high vibration resistance.
High Performance UFS 3.1 interface delivers up to 2100MB/s read speed for fast boot times and smooth multimedia playback in premium infotainment systems.
Cost Flexibility eMMC 5.1 option provides cost-effective storage for mainstream infotainment systems while maintaining automotive-grade reliability.
Data Integrity Power-loss protection and advanced error correction ensure data integrity during unexpected power events common in automotive applications.
Long-Term Support Long product lifecycle support with 5+ years availability and fixed BOM ensures supply continuity for long-term projects.

Recommended Bill of Materials (BOM)

Item Part Number Description Quantity Datasheet
1 FEMDNN064G-A3A55 64GB Automotive eMMC 5.1 1 📄 Download
2 FEMDNN128G-58A43 128GB UFS 3.1 1 📄 Download
3 Decoupling Caps 2.2uF + 0.1uF ceramic capacitors 4 📄 Download
4 Pull-up Resistors 10kΩ for control signals 4 📄 Download

Applications

In-vehicle infotainment systems
Digital instrument clusters
ADAS data recording
Telematics modules
Rear-seat entertainment

Technical Specifications

Storage Capacity
64GB to 256GB
Temperature Range
-40°C to +105°C (Grade 2)
Interface Options
eMMC 5.1 HS400 / UFS 3.1
Sequential Read
Up to 320MB/s (eMMC) / 2100MB/s (UFS)
Sequential Write
Up to 90MB/s (eMMC) / 1200MB/s (UFS)
Vibration Resistance
Compliant with automotive requirements
Qualification
AEC-Q100 Grade 2

Customer Success Stories

Leading Chinese Automotive Tier-1

| Digital instrument cluster and infotainment system

Challenge

Required automotive-grade storage with fast boot time for instrument cluster and large capacity for navigation maps

Solution

Implemented 128GB UFS 3.1 for infotainment and 64GB eMMC for instrument cluster

Results

European Automotive OEM

| Connected car telematics module

Challenge

Needed reliable storage for firmware and data logging in harsh under-hood environment

Solution

Deployed 32GB automotive eMMC with enhanced temperature range

Results

FAE Expert Insights

S

Senior FAE

Applications Engineer

10+ years

Professional Insights

This automotive infotainment storage solution has been successfully deployed in multiple Tier-1 automotive projects. The key to success is selecting the right storage interface based on performance requirements and cost targets. For premium systems with rich multimedia and navigation, UFS 3.1 provides the best user experience. For mainstream systems, eMMC 5.1 offers excellent value while meeting all automotive reliability requirements. I always recommend implementing proper power sequencing and brown-out detection to maximize storage reliability. The AEC-Q100 qualification process is rigorous, and Longsys automotive products have demonstrated excellent field reliability in harsh automotive environments.

Key Takeaways

  • Proper power sequencing is critical for reliable operation
  • Thermal design must account for worst-case automotive environments
  • Early FAE engagement prevents costly redesigns
  • AEC-Q100 Grade 2 required for under-hood applications

Decision Framework

Automotive Storage Selection Framework
Steps:
  1. Define performance requirements (eMMC vs UFS)
  2. Verify AEC-Q100 grade matches thermal environment
  3. Design proper power sequencing and EMC protection

Ready to Implement This Solution?

Contact our FAE team for design support and quotes

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Frequently Asked Questions

What is the difference between AEC-Q100 Grade 2 and Grade 3?

AEC-Q100 Grade 2 requires operation from -40°C to +105°C ambient temperature, suitable for automotive interior and some under-hood applications. Grade 3 requires -40°C to +85°C, suitable for passenger compartment applications. Grade 2 has more stringent testing requirements and is preferred for applications with higher temperature exposure. Both grades ensure automotive reliability but Grade 2 provides wider operating range.

Select Grade 2 for under-hood or high-temperature locations, Grade 3 for passenger compartment.

How do I handle power sequencing for automotive storage?

Proper power sequencing is critical for reliable operation. eMMC/UFS VCC should be stable before VCCQ (I/O voltage). Implement brown-out detection to prevent operation during low voltage conditions. Use sufficient decoupling capacitors (typically 2.2uF + 0.1uF) close to power pins. Include power-loss detection circuit to enable graceful shutdown. Follow the reference design power sequencing timing requirements provided in the integration guide.

Follow reference design power sequencing for reliable automotive operation.

What filesystem is recommended for automotive storage?

For automotive applications, use filesystems with power-loss tolerance. ext4 with journal checksums is commonly used in Linux-based automotive systems. For raw NAND access without FTL, use UBIFS or JFFS2. Avoid FAT32 for critical applications due to corruption risk during power events. Implement read-only root filesystem with separate read-write partitions for data logging. Consider using overlay filesystems for system updates.

Use ext4 with journal checksums or UBIFS for automotive Linux systems.

How do I calculate storage endurance for automotive applications?

Calculate endurance using: (NAND P/E cycles × Capacity × Over-provisioning factor) / Daily write volume / 365 days. For automotive infotainment with mostly read operations, typical lifespan exceeds 10 years. For data logging applications, calculate based on log frequency and size. Longsys provides endurance calculation tools and can assist with application-specific analysis. Consider using SLC mode or larger capacity for high-write applications.

Contact LiTong FAEs for application-specific endurance calculations.

What EMI considerations are important for automotive storage?

Automotive storage must meet CISPR 25 EMC requirements. Use proper PCB layout with continuous ground plane under storage device. Keep trace lengths short and matched for high-speed signals. Implement proper decoupling and filtering. Shield critical signals if necessary. The BGA package provides good EMC performance due to short bond wires. Follow automotive OEM EMC requirements which may be more stringent than standard CISPR 25.

Follow automotive EMC design guidelines and OEM requirements for storage layout.