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configuration.
Baud rate control (Parameter Number: 4)
The Parameter controls the UART communication speed of the Module. Its value is an integer N,
N= [1/2/4/6/12]. Corresponding baud rate is 9600*N bps
。
Security Level (Parameter Number: 5)
The Parameter controls the matching threshold value of fingerprint searching and matching.
Security level is divided into 5 grades, and corresponding value is 1, 2, 3, 4, 5. At level 1, FAR is
the highest and FRR is the lowest; however at level 5, FAR is the lowest and FRR is the highest.
Data package length (Parameter Number: 6)
The parameter decides the max length of the transferring data package when communicating with
upper computer. Its value is 0, 1, 2, 3, corresponding to 32 bytes, 64 bytes,
128 bytes
, 256 bytes
respectively.
System status register
System status register indicates the current operation status of the Module. Its length is 1 word, and
can be read via instruction
ReadSysPara.
Definition of the register is as follows:
Bit Num
15
4
3
2
1
0
Description
Reserved
ImgBufStat
PWD
Pass
Busy
Note:
Busy
：
1 bit. 1: system is executing commands; 0: system is free;
Pass
：
1 bit. 1: find the matching finger; 0: wrong finger;
PWD
：
1 bit. 1: Verified device’s handshaking password.
ImgBufStat
：
1 bit. 1: image buffer contains valid image.
Module password
The default password of the module is 0x00000000. If the default password is modified, after the
module is powered on,the first instruction of the upper computer to communicate with the module
must be verify password. Only after the password verification is passed, the module will enter the
normal working state and receive other instructions.
The new modified password is stored in Flash and remains at power off.(the modified password
cannot be obtained through the communication instruction. If forgotten by mistake, the module
cannot communicate, please use with caution)
Refer to instruction SetPwd and VfyPwd.
Module address
Each module has an identifying address. When communicating with upper computer, each
instruction/data is transferred in data package form, which contains the address item. Module
system only responds to data package whose address item value is the same with its identifying
address.