PixArt Imaging Inc.
PAS005B
CMOS Image Sensor IC
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
48
Np
2
Pixel_clk(MHz)
24
Power frequency EX_time (x/120)
60HZ
8
cov
0
L_P_F
frame_rate<10
1027
Register setting
CM
1
row_average
CDSx2
single_path
0
1
0
Wcw
1287
Wrd
1027
cf
0
rf
0
Key in Register
L_P_F
Ny
131
Ne
159
t_line
1780
1027
1. ExposureTim ={[(LPF+1+2)-Ny]*t_line- Ne'}/Pxclk
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
1
5. Frame rate =
= 1/(1027+3)* 1780 = 13 (per/sec)
(LPF +1+ 2)⋅t _ line
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PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
