정전식 지문 스캔 센서 -UART
(Capacitive Fingerprint Sensor -UART, SFM-V1.7)
개요
- 본 제품은 정전식 지문 스캔 센서 -UART, SFM-V1.7 입니다.
- UART 인터페이스를 가지고 있으며, 3.3V 시스템과 사용이 가능합니다.
- 100개의지문을저장할수 있습니다.
특징
- Working current: the current when the fingerprint module is in the imaging state, such as the registration process and comparison process
- Static power consumption: the current when the fingerprint power supply voltage of the fingerprint module is 0 level and the touch power supply voltage is 3.3V; if the touch power supply voltage exceeds the specified range, abnormalities may occur
- Communication interface: standard UART TTL level
- Baud rate: default 115200 bps, 1 start bit, 1 stop bit, 3.3V TTL level
- Connector: XH-6-1.0, 6-Pin wire harness vertical strip connector, spacing 1.0mm
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문서
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Pin definition:
Note: The serial port is 3.3V TTL level, and the computer needs level conversion. V_TOUCH must be powered all the time, TOUCH_OUT for touch output, the touch chip output is active high and the level value is consistent with V_TOUCH. When the finger touches the gold TOUCH_OUT outputs the effective level when it belongs to the frame surface.
Connection with serial port (CH340):
To achieve the optimal low-power design, it is recommended to keep the VCC_3V3 of the module in the power-off state in actual application and control the voltage on or off by judging the TOUCH_OUT pin signal. When TOUCH_OUT present a valid level, the VCC_3V3 power supply is enabled, and the fingerprint module enters the working state at this time.