Design Win

Connector board for MCU and class D audio amplifier

Download databrief Order Direct

Product overview


The AEK-CON-C1D9031 is a connector board dedicated to bridge AEK-AUD-D903V1 board hosting FDA903D automotive digital class D power amplifier and AEK-MCU-C1MLIT1 board hosting a SPC582B Chorus family automotive MCU with 1MB flash. On the board there are two main female strip connectors: a 19x2 one is used for AEK-MCU-C1MLIT1 while the 20x2 is used for the AEK-AUD-D903V1. An additional 15x2 male strip J2 is used to connect the AEK-MCU-C1MLIT1 and AEK-AUD-D903V1. It is mandatory to fill the connector with all jumpers, except for the position 19-20 (I2S Test).

A regulator and a level translator are employed to adjust level of a debug signal coming from the audio amp for current monitoring during play. This signal is called I2S test and it is digital and synchronized with the audio data sent through the I2S interface.

To make the system a potential audio sub-module, a CAN transceiver has been added employing L9616. This allows to sent audio commands to the MCU through CAN interface. A 6-pin male connector is available on the board for this purpose.

The last 4-pin plug of the board is dedicated to connect a separate board with two potentiometers actuated with sliders. The values of the potentiometers are fed to the MCU ADCs (analog-to-digital converters) compatible with 5V levels. One potentiometer could be employed to control the volume while the second one is used to accelerate the sound played.

Traditionally, the audio sub-module is used for typical automotive infotainment applications. Recently, the Electric Vehicle Warning Sounds (AVAS) system has become a new growing application for automotive audio. This system is required by new vehicles to alert pedestrians of the presence of electric powered vehicles that are generating much less noise. Warning sounds may be driver triggered (like a horn) or automatic mimicking engine sounds.

The speed slider can be employed to modify the played sound to simulate a change of the engine rpm. From 2021 according to government regulations, the vehicle must make a continuous noise level of at least 56 dBA (within 2 meters) if the car is going 20 km/h (12 mph) or slower, and a maximum of 75 dBA. The combination of AEK-AUD-D903V1 with AEK-MCU-C1MLIT1 through AEK-CON-C1D9031 offers a viable low-cost solution for entry-level AVAS systems. The CAN interface allows remote control of several audio sub-modules that can be placed around the vehicle.

  • All features

    • Connector board for MCU board AEK-MCU-C1MLIT1
    • Connector board for Class D audio amp AEK-AUD-D903V1
    • It hosts an L9616 CAN transceiver
    • It hosts a level translator to adjust I2S test pin from audio board to a compatible level for MCU
    • Separated board with two potentiometers with 5V compliant sliders included
    • RoHS compliant
    • Included in the AutoDevKit™ initiative

You might also like...

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
CARD Industrial Ecopack2 Yes




Material Declaration**:

Marketing Status






RoHS Compliance Grade


(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Swipe or click the button to explore more details Don't show this again
Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Packing Type
Country of Origin
Core Product
Available at distributors

Distributor availability of AEK-CON-C1D9031

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

AEK-CON-C1D9031 Active

Budgetary Price (US$)*/Qty:
Packing Type:
Country of Origin:

Part Number:




Core Product:


Distributor Name

Distributor reported inventory date:

Swipe or click the button to explore more details Don't show this again

(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors