PixArt Imaging Inc.

PAS005B

CMOS Image Sensor IC

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PixArt Imaging Inc.

when

system clock 48M hz

pxclk

24M hz

exposure time

8/120 sec

Please keep L_P_F = 1027

And Calculate Ny = ? and Ne = ? ,

Application

System_clk

Np

Pixel_clk(MHz)

48

2

24

Power frequency

EX_time (x/120)

60HZ

8

L_P_F

cov

frame_rate<10

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

t_line

1027

131

159

1780

1.

2. t_line = (active_line_pixel + t_nov + 12) = 1300 + 480 + 12 = 1780 Pxclk

t_nov = 480 + Cov Pxclk

3. Ny = INT[(L_P_F+3) - (( EX_Time * Pxclk ) / t_line)]

131 = INT [(1027+3 ) - (( 8/120

* 24 M ) / 1780 )]

4.Ne = Res[(L_P_F + 3) - (( EX_Time * Pixel_clk ) / t_line)] * active_line_pixel

159 = Res[(1027

+3) - (( 8/120

*24 M

) / 1780 )]

* 1300

line

t

LPF

_

)

2

1

(

1

⋅

+

+

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

5. Frame rate =