As Vehicles Become Data Centers: Why Interface IP Integration Matters in SoC Design

By Qualitas Semiconductor

August 18, 2026

1. Background — Growing Demand for Interface Integration in the SDV Era

Automotive electronic systems are rapidly shifting from a distributed, function-specific ECU architecture to a centralized domain controller architecture. As the industry moves toward software-defined vehicles (SDVs), automotive SoCs must process data generated across a wide range of systems, including cameras, radar, displays, and AI accelerators, in an integrated manner.

As the number, resolution, and frame rate of ADAS sensors increase, bandwidth requirements for the interfaces connecting the inside and outside of the SoC continue to rise. At the same time, automotive SoCs must operate reliably over long lifetimes, so high reliability and functional safety requirements must also be taken into account. When designing an automotive SoC, therefore, it is important to review not only interface bandwidth but also operating environment, reliability, and functional safety requirements comprehensively from the earliest stage of design.

Company A, a Korean automotive SoC specialist, evaluated interface IP integration together with the accompanying technical support structure while developing IVI (In-Vehicle Infotainment), digital cockpit, ADAS, and domain controller SoCs. When MIPI C/D-PHY, PCIe, and trace interfaces are sourced as IP from different vendors, verification environments and technical support channels are separated for each IP, and coordination work between vendors can increase during integration.

2. Challenges — Three Integration Challenges

Integrating multi-protocol IP into an automotive SoC requires reviewing not only the performance specifications of individual IP, but also PHY–Controller interworking, per-IP integration conditions, the verification environment, and the technical support structure.

1. Multi-Protocol Verification and Integration Burden

   When the PHY and Controller are procured from different vendors, the interworking conditions between them and the power and interface conditions of each IP must be confirmed individually. In addition, if verification environments and support procedures differ by vendor, additional engineering effort may be required to analyze and coordinate issues that arise during integration verification.

2. Fragmented Technical Support Channels

   When an issue occurs during integration, the team must determine whether the root cause lies in the PHY, the Controller, or the interworking conditions between the two components. In a multi-vendor environment, issues must be investigated in parallel with several suppliers depending on the scope of the cause, which can make communication and analysis procedures more complex.

   During silicon validation in particular, a single problem can manifest across multiple IP blocks and the wider SoC environment, so the process of sharing data with each vendor separately and confirming the root cause can affect the overall debugging timeline.

3. Need for Post-Production Debugging Capability 

   Design-stage simulation alone cannot reproduce every intermittent error that occurs in real silicon or in the field. In complex SoCs especially, it is essential to have observability into the internal state and events at the moment an error occurs.

   Considering a trace interface that can track internal SoC behavior at the early architecture stage therefore secures a means of internal observation, both for silicon validation and for analyzing issues that arise after the product enters mass production.

3. Solution — An IP Portfolio Covering Both Communication and Debug Interfaces, Backed by Unified Support

By bringing communication interfaces and debug interfaces together into a single IP portfolio, Company A explored a way to improve efficiency not only in individual IP performance, but across the entire development process spanning SoC integration, verification, and silicon debugging.

3.1  Communication Interfaces: MIPI C/D-PHY, PCIe

Automotive high-speed interface IP must be designed and verified with the target operating environment and reliability requirements in mind. Verification results obtained only under consumer-grade operating conditions are therefore limited in their ability to demonstrate whether the reliability and functional safety requirements of automotive applications are met.

Qualitas Semiconductor develops its MIPI C/D-PHY and PCIe PHY with automotive applications in mind. The company also provides Functional Safety deliverables such as FMEDA and Safety Manual for ISO 26262 compliance, and is progressively pursuing ASIL-B/D related certification in cooperation with TÜV Rheinland.

Considering automotive reliability and functional safety requirements alongside the performance of the interface IP itself allows verification scope and system requirements to be managed more systematically from the SoC design stage onward.

3.2  Debug Interface: HSSTP LINK IP

HSSTP (High-Speed Serial Trace Port) is a high-speed trace interface based on the Arm standard specification, used to transfer execution information and events generated inside the SoC to external debug and trace systems.

Taking HSSTP into account from the early stages of SoC architecture makes internal trace data available during silicon validation and field debugging. It is particularly useful for capturing information about internal behavior at the moment a problem occurs, such as intermittent errors or complex system issues whose root cause is difficult to identify from external signals alone.

This establishes a debugging path for observing the internal state of the SoC, from ATE-based silicon validation through system debugging to field issue analysis after mass production.

3.3 Unified Technical Support Structure

Licensing multi-protocol IP from a single vendor has the advantage of consolidating inquiry and technical support into one channel.

Issues that arise at each development stage — Verilog model simulation, synthesis/STA, SoC layout, ATE and SET TEST debugging — can be tracked within the same support structure, simplifying the process of identifying the scope of a root cause and responding to it.

It also reduces the procedures needed to coordinate roles and areas of responsibility between individual vendors when an issue involves several IP blocks at once. As a result, a single-vendor interface IP portfolio goes beyond a difference in procurement approach and can help establish an integrated development framework that connects SoC design, verification, silicon debugging, and post-production technical support.

4. Outcomes — An SoC Product Family Built on a Consistent IP Foundation

Company A applied Qualitas’ integrated interface IP across its automotive SoC product family, spanning IVI, digital cockpit, ADAS, and domain controllers. The key benefits gained by unifying communication and debugging within a single IP ecosystem are as follows.

• Reduced Cross-Verification Effort 

  Consolidating MIPI C/D-PHY, PCIe, and HSSTP with a single vendor allowed timing alignment and power compatibility between IP blocks to be verified together, reducing unnecessary cross-verification effort.

• Faster Issue Response 

  With a single technical support channel covering everything from Verilog simulation to ATE debugging, root-cause analysis and resolution moved faster whenever a problem occurred.

• Lower Automotive Certification Risk 

  Securing an ISO 26262 ASIL-B/D safety package and AEC-Q100 design criteria at the IP level reduced the customer’s preparation burden for SoC certification review.

• Improved Post-Production Debugging 

  Embedding HSSTP early in the architecture made SoC internal trace data available during ATE validation and field issue tracking.

Explore Qualitas IP:

• MIPI CSI-2 RX Controller
• PCIe Gen4.0 PHY IP
• DSI-2 TX/RX Controller

Planning your next-generation Automotive SoC?

The more functions an automotive SoC integrates, the more important a consistent interface strategy spanning communication and debugging becomes. With an integrated IP portfolio that includes MIPI C/D-PHY, PCIe, and HSSTP, Qualitas Semiconductor helps next-generation automotive SoC designers reduce complexity from the early architecture stage and move into mass production with confidence.

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About Qualitas Semiconductor

Qualitas Semiconductor Inc. is a KOSDAQ-listed company specializing in high-speed interface IP solutions, designing and licensing high-speed interface IP such as MIPI, PCIe, and UCIe for a wide range of fields including automotive, mobile, data center, AI, and IoT.  |   www.q-semi.com