PRELIMINARY
SF104-P01
SF3013M Fingerprint Image Sensor Module User Manual
Page - 14
Code 0xC0 / SRST command (write only)
This command generates a software reset to the system. Its effect is the same as
hardware reset except that the register content is left unchanged.
Code 0x2N / register read command
This command starts reading register at address N
At least to bytes needs to be written, the first byte is the command code, and the second
(dummy) byte is for the register content.
Subsequent register read command can be cascaded in one command sequence.
Code 0x4N / register write command
This command starts writing registers starting at address N
The first byte is the command code, followed by subsequent bytes that are written to
registers starting at the specified starting address N.
Code 0x3E, 0x3F / Chip ID read command
These two command read back the chip id of high and low byte
0x3E : Chip ID High Byte – Value 0x01 for SF104.
0x3F : Chip ID Low Byte – Value 0x04 for SF104.
All command code as the first byte in a command sequence returns the state byte
(which can be explicitly read by the 03 command).
