AR0141CS: 1/4-Inch Digital Image Sensor
Frame Readout
Frame Readout
The sensor readout begins with vertical blanking rows followed by the active rows. The
frame readout period can be defined by the number of row periods within a frame
(frame_length_lines) and the row period (line_length_pck/clk_pix). The sensor will read
the first vertical blanking row at the beginning of the frame period and the last active row
at the end of the row period.
Figure 28: Example of the Sensor Output of a 1280 x 720 Frame at 60 fps
The frame valid and line valid signals mentioned in this diagram represent internal signals within the sensor.
The SYNC codes represented in this diagram represent the HiSPi Streaming-SP protocol.
1/60s
1/60s
Row Reset
Row Read Row Reset
Row Read
Vertical Blanking
Active Rows
Time
Serial SYNC Codes
Start of Vertical Blanking
Start of Frame
Start of Active Row
End of Line
End of Frame
Row Reset
Row Read Row Reset
End of Frame
Readout
Row Read
End of Frame
Readout
HB (370 Pixels/Column)
1280 x 720
HB (370 Pixels/Column)
1280 x 720
Frame Valid
Line Valid
Figure 28 aligns the frame integration and readout operation to the sensor output. It also
shows the sensor output using the HiSPi Streaming-SP protocol. Different sensor proto-
cols will list different SYNC codes.
AR0141CS DS Rev. D Pub. 6/15 EN
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