Hi-link fingerprint recognition module HLK-ZW0623 test kit/ development board high-resolution capacitive touch fingerprint door lock acquisition sensor module

Product introduction

Consumers use fingerprint recognition modules for user identity determination. When a user touches the fingerprint recognition module with a finger, the fingerprint recognition module scans

the user's fingerprint. The algorithm chip can obtain the fingerprint image data for registration and comparison. Right operation.

Product Selection List

Specfications

Mechanical Properties

Electrical parameters

Electrical parameters

• Directly using the fingerprint sensor FD mode, the SENSOR wake-up is highly reliable and reduces the risk of false triggering.

• When there is no finger touch, the Detect signal line is low level. When the finger touches the fingerprint sensor, the signal is triggered to high level, and then changes to low level when the finger leaves

• Fingerprint module workflow description:

  When the fingerprint module is in sleep state, Detect is used as a wake-up signal. When the finger touches the fingerprint sensor, the interrupt signal is triggered, and then wakes up the system. The main control MCU controls the power-on of MCU_3.3V. After the fingerprint module algorithm chip is powered on and initialized, the main control MCU controls the fingerprint module through serial port commands to complete image collection and registration. , comparison task. After the task is completed, the main control chip controls the fingerprint module to sleep and controls the MCU_3.3V to power off. The system enters sleep and waits for the next round of work. After the system wakes up, the main control MCU can mask the interrupt signal, and turn on interrupt detection again before going to sleep after the task is completed.

• Fingerprint sensor chip power supply requirements:

  The characteristics of the fingerprint chip itself: in FD (FingerDetect) mode, that is, when the fingerprint sensor periodically scans and detects fingerprints, a peak current of about

  200mAwill appear for 4us. Therefore, there are strict requirements for the power supply of the fingerprint chip. sensor_3.3V needs to control the power supply ripple within 200mV to avoid Specifications excessive power supply ripple causing the fingerprint sensor to reset at low voltage, causing the fingerprint sensor to fail to work properly.