PRELIMINARY
SF104-P01
SF3013M Fingerprint Image Sensor Module User Manual
Page - 16
For the gain control of PGA2
PGA2 gain =PGA_gain*[(Vinp_pga-ViVoff]/[2*(VRT-VRB)]*255
[3]
EN_TEST1
0 : Disable Test mode 1
1 : Enable Test mode 1
[2]
EN_TEST0
0 : Disable Test mode 0
1 : Enable Test mode 0
[1:0]
PGA1_GAIN
00 : 4.6
01 : 7.6
10 : 12.8
11 : 22.7
REG_DCOC 2 R/W
0000_0000 DC_OFFSET - DC offset control of PGA2
[7]
Sign bit
0 : negative
1 : positive
[6:0]
Offset compensated voltage
The DC offset voltage is set as the following formula:
Voff=0.4545*(2*B7-1)*[<B6:B0>/128*(VRT-VRB)+Vos1]
Vos1 ~ N(
μ
1,
σ
1) normal distribution,
μ
1=0 &
σ
1~=3.5mV~5mV
REG_ADC 3
R/W
0010_0101
Adc
setting
[7]
Not
used
[6:4]
ADC_BIAS
