MIPI SoundWire-I3S Protocol Validation Suite & Services

MIPI SoundWire-I3S Protocol Validation Suite & Services

Product Details

  • Overview
  • Functional Coverage ​
  • Parametric Coverage
  • Features
  • FAQ

SoundWire-I3S interface is used for transporting data typically related to audio functions. The SoundWire-I3S interface addresses a wide range of system scenarios where up to eleven Peripheral interfaces share the common bus. SoundWire-I3S facilitates the development of low-cost, efficient, and high-performance systems. 


As a part of product validation, it is important to validate the product’s conformance against the protocol specification to ensure the product’s interoperability. As the complexity of the protocol and product increases, the validation time of the protocol interfaces also increases, which, in turn, reduces the RTM. Performing the protocol conformance testing traditionally needs a lot of time and effort.  


Soliton’s SoundWire-I3S Protocol Validation Tool is an off-the-shelf validation tool using NI’s PXI Platform, which helps to validate the device’s compliance with the timing and electrical specifications of the SoundWire-I3S protocol. The tool SoundWire-I3S also validates the device’s tolerance to and recovery from various SoundWire-I3S faults & exceptions and provides a comprehensive set of reports.

Functional Coverage ​
  • LVDS
  • Single Ended
  • Configurable Row Configurations
    • With/Without Data Bit Groupings
    • With/Without Quieting Bits
    • With/Without Tailing Bits
    • With/Without Handoff
  • Ability to Scale Up/Down Row Rate
  • Ability to Add/Remove Channels
  • Configurable number of Rows and Columns
  • Configurability for Number of BitSlots per Frame & Frame Structure
  • Continuous Clock can be sourced
  • Bus Reset & Recovery Tests
  • Clock Pause & Stop
  • MSB – LSB Bit Ordering
  • Single & Multiple Dataline support
  • Ping
  • Getlow32
  • Gethigh32
  • WriteA32
  • ReadA32
  • Safe-16 Command
  • Inverted Clock Polarity
  • Command Errors
  • Transport Errors
  • Sync Error
  • Other Bit-level and Frame level Error injection
Parametric Coverage
  • Clock Frequency
  • t_high_clock
  • t_low_clock
  • t_slew_clock
  • t_Setup_Data
  • t_Hold_Data
  • Row Rate (LVDS)
  • Wide Bit Rate
  • VIL – Low-Level Input Voltage
  • VIH – High-Level Input Voltage
  • VTP – Positive Going Input Threshold Voltage
  • VTN – Negative Going Input Threshold Voltage
  • VOL – Output Low Level
  • VOH – Output High Level
  • VHys  – Inputs Hysteresis
  • High and Low Voltage Level (for LVDS)
Features of MIPI SoundWire-I3S
  • ISO 9001 Certified Product
  • Simple, Flexible, Modular and Light Bench Setup
  • Easy to use Soundwire-I3S Protocol Exerciser and Debugger to perform various Soundwire-I3S transactions with controllable timings/voltage levels
  • Protocol compliance testing with zero coding
  • Comprehensive reporting feature to report the test pass/fail reports
  • Generates Full Compliance reports in less than 2 hours
  • Reproduce failure cases in a few clicks
  • Easy to build and test custom device-specific tests
  • Automation Capability (DLLs/APIs) from external programming environment/automation frameworks like LabVIEW, C#, Python, TestStand, etc
  • Leverage Soliton’s experience in protocol validation and debugging
How is this product different from existing Protocol Exercisers, Debugger or Analyzers?​

This product is mainly used for performing functional and electrical compliance validation of the SoundWire-I3S devices (post silicon validation) whereas the other existing protocol exercisers, debuggers or analyzers are used for performing basic functional tests during the device bring up​.

Can't I build a home-grown solution instead?​

While this is certainly an option, we expect that it will take a highly experienced automation engineer between 3-6 months to create a first version of a similar tool. To create a robust and flexible tool takes experience, and we have been improving this tool over the last 3 years since release. We believe it is worth the cost to skip the learning curve and avail our comprehensive report or validation suite.​

What else can I do with NI's PXI chassis/modules?​

The PXIe-657x module is a general-purpose programmable pattern generator and acquisition device with deep memory. It can be used for other protocol validation tools from us. Also, it can be programmed using LabVIEW or other programming languages to emulate any synchronous digital protocol. NI’s PXI chassis supports high bandwidth and synchronization-friendly control and read back from a huge variety of digital, analog, and special-purpose modules in a compact form factor.​

What is the interposer board referenced in the system diagram?​

The Protocol Validation Suite requires custom external circuitry for signal conditioning. Each purchase comes with a complimentary interposer board, which is a separate PCB designed and delivered by us. ​

Which oscilloscope models are supported?​

The Protocol Validation Suite supports any NI scope by default. The tool has a flexible architecture that allows the support of other oscilloscope models. We can help you in building the oscilloscope plugin for one of your oscilloscopes​.

What type of documentation and training will be available for each solution?

User manuals, Getting started guides, and tutorial videos are available for each solution and can be easily accessed from within the product. Additionally, we will provide short live training sessions upon request. ​

Can the tool be used for out-of-the-box validation?

Yes, The tool comes with out of box test scripts which can be used for validation after entering the device-specific details​.

Technical Documentation

Soliton’s SoundWire-I3S Validation Suite is an off the shelf validation tool using NI’s PXI Platform, which helps to validate the devices’ compliance with timing and electrical specifications of the Soundwire protocol. It contains the below components. 

  • NI PXIe 657x – Digital Pattern Generation Card with the PXIe Chassis setup 
  • Soliton PVS Interposer Board 
  • Oscilloscope – For performing voltage measurements 
  • Soliton SoundWire-I3S Validation Suite Software compatible with Windows OS (Win 10) 



Soliton’s SoundWire-I3S Validation suite is based on the NI – PXI Platform, and the below NI part configuration lists the hardware required to perform the validation

The solution also needs a custom Interposer Board for signal conditioning purposes. 


The DUT can be connected through the Berg Connector​
The DUT can be connected through the Berg Connector.​

Support & Training

For any queries, contact us at [email protected]. We will respond within 1 business day.

*Please note that this product is in the alpha stage.




  • Design Engineers, Test Engineers, Post Silicon Validation Engineers, Engineering Managers, Validation Managers, Lab Managers etc. from the Semiconductor Industry.
  • Post-silicon validation of chips with SoundWire-I3S interface.
  • Semiconductor Chip Manufacturers making Soundwire-I3S Devices.
  • Product Manufacturers making products with SoundWire-I3S interface.
  • Audio device Manufacturers who need to test against  SoundWire-I3S specifications.




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