PixArt Imaging Inc.

PAS005B

CMOS Image Sensor IC

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PixArt Imaging Inc.

EXAMPLE_4: Sunlight mode Exposure time setting

MEGA setting

when

system clock 48M hz

pxclk

12M hz

exposure time

< one line pxclk (sec)

Please keep L_P_F = 1027

And Calculate Ny = ? and Ne = ? ,

Application

System_clk

Np

Pixel_clk(MHz)

48

4

12

Power frequency EX_time (x/120)

60HZ

X_t

L_P_F

cov

1027

0

Register setting

CM

row_average

CDSx2

single_path

1

0

1

0

Wcw

Wrd

Cf

rf

1287

1027

0

0

Key in Register

L_P_F

Ny

Ne<1300

t_line

1027

1029

X_Ne

1780

1. Exposure Tim (X_t) =[ 1030 – Ne (X_Ne)] /Pxclk (sec)

line

t

LPF

_

)

2

1

(

1

⋅

+

+

= 1 / (1027+3) * 1780 = 13

2. Frame rate =