STMicroelectronics STEVAL-USBC2DP

Overview

STEVAL-USBC2DP from STMicroelectronics is a fully assembled, RoHS-compliant USB Type-C to DisplayPort adapter reference design board measuring 5.5 × 2.3 cm. It implements VESA DisplayPort Alternate Mode over USB Type-C using an STM32F072C8U6 MCU, LDK220 LDO, and STG3684A dual SPDT switch, with certified X-CUBE-USB-PD middleware supporting USB PD 3.0 and Billboard Device Class for firmware updates.

For engineers reviewing the STEVAL-USBC2DP datasheet, STEVAL-USBC2DP pinout, STEVAL-USBC2DP application, or STEVAL-USBC2DP equivalent, this board serves as a production-ready evaluation platform for USB-C Alt Mode negotiation, DP AUX/HPD signal routing, VBUS/VCONN power management, and embedded USB 2.0 peripheral integration in compact dongle designs.

Technical Context

The board implements full USB Type-C DisplayPort Alternate Mode using vendor-defined messages (VDMs) over the configuration channel (CC), with STM32F072 MCU handling DP mode entry/exit, HPD assertion, and AUX channel handshaking. The discrete analog front end interfaces CC lines to the MCU's GPIOs, enabling real-time PD communication without external transceivers.

Power is sourced either from VBUS (5 V) or VCONN (up to 5 V), regulated to 3.3 V by the LDK220 LDO (200 mA, low-noise). The STG3684A switch routes DP AUX_P/N and SBU signals between Type-C and DisplayPort connectors, while EMI filtering and ESD protection (ESDAULC5-1BF4, ESDALC5-1BF4) are integrated on both interfaces.

Key Specifications

Availability

STEVAL-USBC2DP is available at Aetrix Electronics and suitable for USB-C dongle development, embedded display interface prototyping, and USB PD compliance validation requiring stable component supply and traceable reference design assets.

Supply support for STEVAL-USBC2DP 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, designing and manufacturing microcontrollers, analog ICs, power management, sensors, and automotive-grade components.

This board belongs to ST's STEVAL evaluation series - purpose-built reference designs that accelerate time-to-prototype for USB-C, Power Delivery, and interface conversion applications using ST's ecosystem of MCUs, PMICs, and software stacks.

FAQ

Does STEVAL-USBC2DP support USB-C video output to monitors with native DisplayPort inputs?

Yes. The board implements VESA DisplayPort Alternate Mode per specification 1.0a, enabling direct video transmission over USB-C SuperSpeed lanes to DisplayPort monitors. It negotiates DP mode via VDMs, asserts HPD, and routes AUX channel signals - confirmed functional with compliant source devices and DP displays.

Can the onboard STM32F072 be reprogrammed with custom firmware?

Yes. The board includes a standard SWD connector compatible with ST-LINK/V2-1 debuggers. The MCU is accessible via PA13 (SWDIO) and PA14 (SWCLK), and the BOOT0 pin is exposed for system memory boot mode. Firmware can be updated using STM32CubeIDE or ST's DFU bootloader over USB.

What power sources does STEVAL-USBC2DP accept, and how is power monitored?

It accepts power from either USB-C VBUS (5 V) or VCONN (up to 5 V), selected automatically. VBUS voltage is sensed via a resistor divider (R14/R16) feeding PB0 ADC input, enabling real-time monitoring in firmware. The LDK220 LDO delivers regulated 3.3 V to all active circuitry with low noise and high PSRR.

Is ESD protection implemented on both USB-C and DisplayPort connectors?

Yes. ESDAULC5-1BF4 transient suppressors protect USB-C CC, D+/D−, and SBU lines. ESDALC5-1BF4 devices guard DP AUX_P/N and HPD pins. All high-speed lanes include 0.1 µF AC-coupling capacitors and series resistors for impedance matching and EMI suppression.