STMicroelectronics EVALSP1340HDM

Overview

EVALSP1340HDM from STMicroelectronics is an optional HDMI transmitter plugboard designed for use with the EVALSP1340CPU evaluation board, enabling CLCD video output via HDMI interface to support display development and validation for the SPEAr1340 embedded MPU. It provides HDMI 1.3a-compliant transmission, supports up to 720p/1080i resolution, integrates TMDS encoding, and connects directly to the main board's CLCD interface.

For engineers reviewing the EVALSP1340HDM datasheet, EVALSP1340HDM pinout, EVALSP1340HDM application, or EVALSP1340HDM equivalent, this plugboard serves as a verified hardware extension for video subsystem bring-up, HDMI compliance testing, and rapid UI prototyping on SPEAr1340-based platforms.

Technical Context

The EVALSP1340HDM implements a parallel-to-TMDS conversion path from the SPEAr1340's CLCD bus (24-bit RGB + sync signals) to HDMI 1.3a output. It uses a dedicated HDMI transmitter IC (ST's own or licensed silicon) with integrated PLL for pixel clock regeneration and HDCP-ready signaling architecture.

It operates at 3.3 V supply, draws ≤120 mA typical current, and interfaces exclusively through a 40-pin CLCD expansion header on EVALSP1340CPU. No firmware or host processor configuration is required-functionality is hardware-automated upon power-up and signal detection.

Key Specifications

Availability

EVALSP1340HDM is available at Aetrix Electronics and suitable for embedded display development, HDMI compliance verification, and SPEAr1340-based multimedia prototyping requiring stable component supply and documented reference integration.

Supply support for EVALSP1340HDM 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, delivering microcontrollers, MPUs, analog, power, and MEMS solutions across automotive, industrial, and consumer markets.

EVALSP1340HDM belongs to ST's SPEAr evaluation ecosystem, designed specifically to accelerate software and hardware co-development for the SPEAr1340 ARM Cortex-A9-based embedded MPU platform.

FAQ

Is EVALSP1340HDM compatible with other ST evaluation boards?

No. EVALSP1340HDM is mechanically and electrically designed only for the EVALSP1340CPU rev. 2.2 board. Its 40-pin CLCD header footprint, signal mapping, and power routing are specific to that board's layout and SPEAr1340 CLCD timing requirements. It does not mate with STM32, STR9, or other ST MPU evaluation platforms.

Does EVALSP1340HDM include HDCP encryption capability?

No. The plugboard implements HDMI 1.3a physical layer and TMDS transmission but does not integrate HDCP keys or authentication circuitry. It supports unencrypted video streams only; content protection must be handled upstream by the SPEAr1340 application software or external security module.

What display resolutions are natively supported without configuration?

720p (1280×720 @ 60 Hz) and 1080i (1920×1080 @ 60 Hz interlaced) are supported out-of-box using default SPEAr1340 Linux kernel display drivers and boot-time CLCD initialization. No register-level programming or EDID emulation is required for these modes.

Can EVALSP1340HDM be used independently of EVALSP1340CPU?

No. EVALSP1340HDM has no onboard power regulation, clock generation, or video source logic. It relies entirely on the host EVALSP1340CPU board for 3.3 V supply, pixel clock, RGB data, and synchronization signals. It functions solely as a passive interface adapter-not a standalone module.