STMicroelectronics STV0684

Overview

STV0684 from STMicroelectronics is a single-chip digital camera processor integrating ST20 32-bit RISC core, dedicated video processor (VP), JPEG/MJPEG codec, 16-bit Sigma-Delta audio ADC, audio DAC (PWM-based), PAL/NTSC TV encoder, LCD controller, USB 1.1 interface, and NAND/CF/SD mass storage support - designed for UXGA (1600×1200) and SXGA (1280×1024) CMOS sensor-based digital still cameras. It executes firmware from SDRAM, boots via embedded ROM bootloader, and targets ultra-compact camera designs using BGA196 (12×12 mm) packaging.

For engineers reviewing the STV0684 datasheet, STV0684 pinout, STV0684 application, or STV0684 equivalent, key selection considerations include its dual-scaler architecture for simultaneous preview and recording, on-chip NORA noise reduction and anti-vignetting algorithms, RAM-based firmware flexibility, 48 MSPS pixel processing throughput, and integrated analog audio front-end with ALG and noise gating - all critical for low-power, high-fidelity embedded imaging systems.

Technical Context

The STV0684 implements a heterogeneous SoC architecture: the ST20-C103 core (48 MHz) handles system control and firmware execution, while the hardware-accelerated video processor performs real-time Bayer demosaic, RGB/YUV conversion, gamma correction, defect pixel correction, and programmable scaling - all supported by RAM-resident firmware for field-upgradable algorithms. Its VP includes four real-time accumulators and zone-based statistics for adaptive exposure and white balance.

Audio path integrates a 16-bit Sigma-Delta ADC with automatic level control and noise gate, feeding an ADPCM 4:1 compressor; playback uses PWM output with external RC filtering. The TV encoder provides direct CVBS output with on-chip DAC, and the LCD controller supports flexible TFT/TFD interfaces with preview-during-recording capability - enabled by dual FIFO paths and independent scaler units.

Key Specifications

Pinout & Package

BGA196 package, 12 mm × 12 mm, 0.8 mm pitch - optimized for compact digital camera PCB layouts with minimal board area and thermal footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital camera processor applications.

Compared with OV5640 and DM365, the STV0684 uniquely combines UXGA sensor interface, self-contained firmware execution, hardware JPEG/MJPEG, NAND ECC, and USB mass storage compliance in one BGA196 package - making it the only single-chip solution for fully autonomous, firmware-upgradable digital still cameras under 12×12 mm PCB footprint.

Availability

STV0684 is available at Aetrix Electronics and suitable for consumer digital still cameras, ultra-compact video recorders, and embedded OEM camera modules requiring stable component supply, long-lifecycle support, and design continuity for volume production.

Supply support for STV0684 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 microcontrollers, analog ICs, MEMS, and imaging solutions for automotive, industrial, and consumer markets.

The STV0684 belongs to ST's legacy digital imaging SoC product line, engineered specifically to consolidate high-resolution CMOS camera functionality - including sensor interface, real-time image processing, compression, display, and connectivity - into a single, cost-optimized chip for portable consumer electronics.

FAQ

Does the STV0684 support RAW Bayer output for external processing?

No. The STV0684 processes sensor data internally through its dedicated video processor and outputs only processed YUV 4:2:2 or RGB data - it does not provide raw Bayer stream passthrough. All demosaic, noise reduction, and color correction occur on-die using NORA and anti-vignetting algorithms before scaling and encoding.

What external memory is required for full STV0684 operation?

A minimum of 64 MB SDRAM is required for firmware execution and frame buffering; NAND flash (≥128 MB) is needed for firmware storage and media recording; optional SPI serial flash may be used for boot configuration. The chip includes no internal DRAM beyond 64 KB SRAM and caches.

Is the STV0684 USB interface capable of simultaneous isochronous video and audio streaming?

Yes. The USB 1.1 interface supports concurrent isochronous IN endpoints for video and audio, plus bulk endpoints for file transfer - verified in ST's reference firmware using standard USB Audio and Video Class descriptors compatible with Windows UVC/UAC drivers.

Can the STV0684 drive a 480×272 TFT display directly?

Yes. Its flexible LCD controller supports programmable timing and 16-bit RGB output - confirmed in ST reference designs for Casio and AUO 480×272 panels. The TFT0–TFT16 pin mapping and dot-select registers allow precise configuration of pixel clock, HSYNC/VSYNC polarity, and data enable timing.