Mô Đun Cảm Biến Dấu Vân Tay As608 Chuyên Dụng

System resources
Buffer zones and fingerprint libraries:
The system has a 72k byte image buffer and two 512 bytes-sized feature file buffers named: imagebuffer, charbufferl and charbuffer2, respectively.Users can read and write any-buffer by instruction.
Charbufferl or carbuffer2 can be used to store both common and template feature files.Uploading or downloading images through the uart port to speed up, only 4-bit high in pixels, i.e., two pixels are synthesized into one byte transmission.The whole 8 pixels pass through the usb port.Fingerprint library capacity varies according to the flash capacity of the hanging, the system will automatically diskriminate.Fingerprint templates are stored by serial number, which is defined as: 0-(n-1) (n for fingerprint library capacity).Users can only access the contents of the fingerprint library by serial number.

Hardware interface
Module interface adopts 8 core 1.25 mm spacing single row socket.Inside the module, finger detection circuits are built in, and users can read state pins (waks) to determine whether fingers are pressed or not.The foot is defined as follows:

Vi module power supply is input.
Tx serial data output. Ttl logic level
Rx serial data input. Ttl logic level
Gnd signal.Internal to power supply
Wak induction signal output, default high level effective
Vt touch induction power input. 3.3v-6.5v power supply

Characteristic parameters
Za 620 fingerprint recognition module is a high performance optical fingerprint recognition module introduced by zhi 'an electronics. Za 620 module adopts as608 fingerprint recognition chip of hangzhou sheng yuan chip technology co. ltd.The chip is built-in dsp computing unit, which integrates fingerprint recognition algorithm, which can collect images efficiently and quickly and identify fingerprint characteristics.The module is equipped with serial port, usb communication interface, users do not need to study complex image processing and fingerprint identification algorithms, but simply through simple serial port, usb can control module according to communication protocol.This module can be used in various attendance machines, insurance box cabinet, fingerprint () forbidden system, fingerprint lock and so on.

Technical indicators
Working voltage (v): 3.0~3.6v, typical: 3.3v
Working current (ma): 30~-60ma, typical: 40ma
Usart communication: porter rate (9600xn), n 1-12.Default n 6, bps 57600 (data bit: 8 stop bit: 1 check bit: nonc ttl level)
Usb communication: 2.0 fs (2.0 full speed)
Sensor image size (pixel): 640x480 pixel
Image processing time (s): 0.4 (s)
-power delay (s): 100 ms. module will need about 100 millisecond initialization after it is installled
Search time (s): 300 ms
True rate (frr): 1%
False recognition rate (far): 0.001 per cent
Fingerprint storage capacity: 200 (id: 0~199)
Working environment: temperature (°C)-20-60 humidity 90% (no