The **SC311** is most commonly associated with a high-performance, integrated **CMOS Image Sensor (CIS)** designed for security surveillance, automotive systems, and IoT cameras. It is engineered for low-power consumption and high sensitivity in low-light environments. --- ### 1. Technical Specifications The following table outlines the primary electronic characteristics of the SC311 sensor: | Feature | Specification | | :--- | :--- | | **Resolution** | 3 Megapixels (Approx. 2304 x 1296) | | **Optical Format** | 1/2.7-inch | | **Pixel Size** | 2.0µm x 2.0µm | | **Frame Rate** | Up to 30fps @ 1296p | | **Output Interface** | 10-bit DVP / 2-lane MIPI CSI-2 | | **Supply Voltage** | Analog: 2.8V / Digital: 1.2V / I/O: 1.8V | | **Dynamic Range** | >70dB | | **SNR (Signal-to-Noise)** | High Sensitivity for Low-light | --- ### 2. Internal Architecture The SC311 consists of several integrated electronic sub-systems that handle light conversion and data transmission: * **Pixel Array:** A 2.0µm pixel structure utilizing Back-Illuminated (BSI) or advanced FSI technology to capture photons efficiently. * **Analog-to-Digital Converter (ADC):** Converts the analog voltage from the pixels into 10-bit digital signals. * **Image Signal Processor (ISP) Interface:** While the SC311 performs raw capture, it includes digital logic for windowing, mirroring, and sub-sampling. * **PLL (Phase Locked Loop):** An internal frequency multiplier that allows the chip to generate high-speed internal clocks from a lower-frequency external crystal (OSC). --- ### 3. Pin Configuration and Connectivity The sensor typically communicates with a System on Chip (SoC) via the following electronic protocols: 1. **I2C (SCCB) Interface:** Used for register configuration (setting exposure, gain, etc.). 2. **MIPI CSI-2:** A high-speed differential serial interface used to transmit the raw image data to the processor. 3. **DVP (Digital Video Port):** A parallel interface used in older or lower-cost microcontroller architectures. 4. **Control Pins:** * `RESETB`: Hardware reset. * `PWDN`: Power-down mode for energy saving. * `MCLK`: Master clock input from the SoC. --- ### 4. Application Circuit Block Diagram ```mermaid graph LR A[Lens] --> B[SC311 Sensor] B --> C[MIPI/DVP Interface] C --> D[Main SoC / Processor] D --> E[Storage/Cloud] F[Power Management IC] --> B G[External Oscillator] --> B ``` ---