STMicroelectronics STEVAL-CBP003V1

Overview

STEVAL-CBP003V1 from STMicroelectronics is an evaluation board implementing a front panel for set-top boxes and home theater systems, based on the STLED316S LED controller/driver and ST7LITE39F2 microcontroller as SPI master. It supports 8-segment, 6-digit customized LED display, 8-segment bar graph, 7 front-panel keys, brightness-adjustable potentiometer, reset switch, and self-running demo mode.

For engineers reviewing the STEVAL-CBP003V1 datasheet, STEVAL-CBP003V1 pinout, STEVAL-CBP003V1 application, or STEVAL-CBP003V1 equivalent, this board serves as a ready-to-use reference design for compact front-panel interfaces requiring integrated LED drive, key scanning, and in-circuit programmability in consumer AV equipment.

Technical Context

The board implements a complete front-panel subsystem using STLED316S (24-pin SO package) for multiplexed 6-digit × 8-segment + bar-graph LED control via serial SPI interface, with built-in current regulation and key-scan capability. The ST7LITE39F2 (20-pin SO) acts as system controller, managing display refresh, key debouncing, interrupt handling, and brightness adjustment through analog input.

Power is regulated to 5 V via L78M05CV linear regulator; all LEDs are driven with common-anode configuration across seven digit drivers (U4–U10), while IRQ_N and RESET signals provide hardware-level system control and fault indication.

Key Specifications

Availability

STEVAL-CBP003V1 is available at Aetrix Electronics and suitable for set-top box front panels, home theater in a box (HTiB) user interfaces, and DVD player control panels requiring stable component supply and rapid prototyping validation.

Supply support for STEVAL-CBP003V1 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, power ICs, sensors, and analog/mixed-signal products for industrial, automotive, and consumer markets.

This evaluation board belongs to ST's STEVAL series of application-specific development platforms, designed to accelerate front-panel interface implementation for cost-sensitive consumer audio/video equipment.

FAQ

Does STEVAL-CBP003V1 require external programming hardware?

No. The board includes embedded in-circuit programming capability via the ST7LITE39F2's SWIM interface. A separate programming adapter (e.g., ST-LINK/V2) connects to the 10-pin J3 header, enabling firmware updates without removing the MCU. The board operates independently after initial programming.

Can the LED display be reconfigured for different segment layouts?

Yes. The STLED316S supports flexible segment mapping via its internal register set, and the ST7LITE39F2 firmware can be modified to drive custom segment assignments or alternate digit counts. Schematic shows discrete digit drivers (U4–U10), allowing hardware rework for non-standard configurations.

What is the maximum LED forward voltage supported per segment?

Each segment is driven by STLED316S with constant-current sink capability up to 30 mA per output. With 5 V rail and typical red/green LED VF ≈ 1.8–2.2 V, the board supports standard low-VF indicator LEDs. Higher-VF LEDs (e.g., blue/white) require external current-limiting resistors or voltage boost - not implemented on-board.

Is the interrupt signal (IRQ_N) edge-triggered or level-triggered?

The IRQ_N pin on STLED316S is active-low, open-drain, and asserted on key press or key release events. It is level-triggered: the signal remains low until the host reads the key status register and clears the interrupt flag via SPI command, ensuring no event loss during polling intervals.