AR0330 Datasheet, PDF (42/77 Pages) ON Semiconductor – CMOS Digital Image Sensor

AR0330: 1/3-Inch CMOS Digital Image Sensor
Pixel Sensitivity
Figure 27: Example of 8.33ms Integration in 16.6ms Frame
Vertical Blanking
T_COARSE = coarse_integration_time x T_ROW
8.33 ms = 654 rows x 12.7 μs/row
Read
T_FRAME = frame_length_lines x T_ROW
16.6 ms = 1308 rows x 12.7 μs/row
Reset
Vertical Blanking
Time
The fine integration is then defined by the number of pixel clock periods between the
row reset and row read operation within T_ROW. This period is defined by the fine_integra-
tion_time register.
Figure 28: Row Read and Row Reset Showing Fine Integration
Start of Read Row N
and Reset Row K
Start of Read Row N + 1
and Reset Row K + 1
Read Row N
Reset Row K
T _{FIN E} = fine_integration _time x (1/CLK_PIX)
T_ROW = line_length _pck x (1/CLK_PIX)
T_FINE = fine_integration_time/clk_pix
(EQ 15)
The maximum allowed value for fine_integration_time is line_length_pck - 1204.
ON Semiconductor recommends that the fine_integration_time in the AR0330 be left at
zero.
AR0330_DS Rev. U Pub. 4/15 EN
42
©Semiconductor Components Industries, LLC,2015.