STMicroelectronics AEK-AUD-C1D9031

Overview

AEK-AUD-C1D9031 from STMicroelectronics is a compact, automotive-grade Acoustic Vehicle Alerting System (AVAS) evaluation board integrating the SPC582B60E1 32-bit Chorus-family MCU and two FDA903D Class-D audio amplifiers. It delivers stereo or dual-channel warning audio for electric vehicles, supports I2S audio streaming and I2C configuration, includes CAN2 interface for remote diagnostics and control, and features dedicated diagnostic pins (CD/DIAG A/B), HW_MUTE, and thermal protection.

For engineers reviewing the AEK-AUD-C1D9031 datasheet, AEK-AUD-C1D9031 pinout, AEK-AUD-C1D9031 application, or AEK-AUD-C1D9031 equivalent, this board is intended for rapid validation of AVAS compliance in e-vehicle platforms - with emphasis on real-time audio playback control, fault detection (open-load, short-to-rail), and CAN-based system integration.

Technical Context

The board implements a tightly coupled MCU-amplifier architecture: the SPC582B60E1 manages audio sample delivery via I2S (WS/CLK/DATA), configures amplifier registers over I2C (address 0x40 for U4, 0x10 for U5), and monitors diagnostics through dedicated GPIOs (PC2, PE10) tied to CD/DIAG pins of each FDA903D. CAN2_TX/RX (PA1/PA2) enable vehicle-network command routing and status reporting.

Each FDA903D operates in 4.5–26 V supply range, delivers up to 17 W into 4 Ω at 10% THD+N, and integrates analog/digital supply separation (AVDD/DVDD), output current/voltage sensing, and thermal shutdown. The MCU's eMIOS timers synchronize PWM-driven speaker drive, while ADC channels monitor rail voltages and temperature proxies.

Key Specifications

Availability

AEK-AUD-C1D9031 is available at Aetrix Electronics and suitable for Acoustic Vehicle Alerting System (AVAS) development, automotive infotainment subsystem validation, and e-vehicle pedestrian safety compliance testing requiring stable component supply and reference design traceability.

Supply support for AEK-AUD-C1D9031 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with broad IP portfolio and automotive-grade manufacturing certification.

This board belongs to ST's AutoDevKit ecosystem - a modular platform for rapid prototyping of automotive subsystems - specifically targeting EU Regulation (EU) No 540/2014-compliant AVAS functionality using integrated MCU and Class-D audio power stages.

FAQ

What is the primary function of the AEK-AUD-C1D9031 board?

The AEK-AUD-C1D9031 is an automotive evaluation board designed to implement Acoustic Vehicle Alerting Systems for electric and hybrid vehicles. It generates regulated warning sounds via two FDA903D Class-D amplifiers controlled by the SPC582B60E1 MCU, meeting regulatory requirements for pedestrian awareness during low-speed operation.

Does the board support stereo audio playback and independent channel control?

Yes - the board supports true stereo audio via separate I2S data paths routed to each FDA903D amplifier. Each channel has independent diagnostic monitoring (CD/DIAG A/B), mute control (HW_MUTE A/B), and can be configured for mono or stereo operation using the MCU's I2S peripheral and software-defined routing logic.

How is CAN communication implemented on this board?

CAN2 signals (CAN2_TX on PA1, CAN2_RX on PA2) are routed to an MCP2562FD transceiver (U6) supporting high-speed CAN FD up to 5 Mbps. The transceiver connects to vehicle CAN_H/CAN_L lines via 22 Ω termination resistors and includes VIO level-shifting for compatibility with the MCU's 3.3 V I/O domain.

Can the FDA903D amplifiers be used without the SPC582B60E1 MCU?

No - the FDA903Ds are not directly user-accessible as standalone components on this board. Their EN1–EN4, HW_MUTE, and CD/DIAG pins are hardwired to MCU GPIOs (PC4, PC2, PE10, etc.), and I2C configuration requires firmware running on the SPC582B60E1. External control would require PCB modification and custom driver implementation.