The **FPM3182H-R010CFR** is a high-performance fingerprint sensor module commonly used in biometric security systems. It is designed to capture, process, and store fingerprint data using a capacitive sensing method. --- ### 1. Technical Specifications Below are the primary electronic and physical parameters for this module: | Parameter | Specification | | :--- | :--- | | **Sensor Type** | Capacitive Fingerprint Sensor | | **Operating Voltage** | 3.3V DC (Typical) | | **Interface** | UART (TTL) or USB | | **Resolution** | 508 DPI | | **Fingerprint Capacity** | Typically 500 to 1,000 templates | | **Verification Speed** | < 0.8 seconds | | **False Acceptance Rate (FAR)** | < 0.001% | | **False Rejection Rate (FRR)** | < 1.0% | --- ### 2. Core Electronic Components The module functions as an embedded system. Its internal architecture consists of three main parts: #### A. Capacitive Sensor Array The "R010CFR" series utilizes a matrix of tiny capacitors. When a finger touches the surface, the ridges and valleys of the skin create different capacitance values, which are converted into a digital image. #### B. Integrated Microcontroller (MCU) The module contains an onboard processor that handles: * **Image Processing:** Enhancing the raw scan. * **Feature Extraction:** Converting the image into a mathematical "minutiae" template. * **Matching Engine:** Comparing a live scan against stored templates in internal Flash memory. #### C. Communication Interface The module usually features a 6-pin or 8-pin connector: * **VCC/GND:** Power supply pins. * **TX/RX:** UART serial communication for sending commands and receiving results. * **WAKEUP/IRQ:** An interrupt pin that notifies the host controller when a finger is detected (saving power). --- ### 3. Connection Pinout Example Typically, these modules follow a standard serial pinout: ```markdown 1. VCC - 3.3V Power 2. GND - Ground 3. TXD - Data Transmit (to Host RX) 4. RXD - Data Receive (from Host TX) 5. WAKE - Fingerprint induction signal (High/Low) 6. 3.3V_T - Touch induction power ``` --- ### 4. Implementation Logic To use this part in an electronic project, the workflow is as follows: 1. **Enrollment:** The host sends a command to capture a finger and save it to a specific ID index. 2. **Verification:** The host sends a "Search" command; the module scans the finger, compares it to the database, and returns the ID number or an error. 3. **Security:** The biometric data remains inside the module; the host only receives the "Success/Fail" result, making it highly secure against hacking.