PRELIMINARY
SF104-P01
SF3013M Fingerprint Image Sensor Module User Manual
Page - 13
3.5 Command code detail
Code 01 / RDATA command (read only)
This command pumps image data from FIFO and sends it to host
Code 02 / START command (write only)
This command starts fingerprint image scan
Code 03 / status read command (read only)
This command sends the 8-bit internal status flags to host.
The status flags are defined as below
Bit
Function
0
Data FIFO is “half full”
1
Data FIFO is empty
2
Data FIFO is “almost full”
3
Data FIFO is full
4
Image scan active
5
Detect interrupt flag
6
Detect result is OK
7 (not
used)
