Basler A102K, User Manual, Page: 27 / 133

Camera Interface
BASLER A102
k
2-11
DRAFT
Video Data Sequence
1
When the camera is not transmitting valid data, the frame valid and the line valid bits sent on each
cycle of the pixel clock will be low. Once the camera has completed frame acquisition, it will begin
to send valid data:
• The frame valid bit will become high.
• On the pixel clock cycle where data transmission for line one begins, the line valid bit will
become high. Twelve of the bits transmitted during this clock cycle will contain the data for
pixel number one in line one.
• On the next cycle of the pixel clock, the line valid bit will be high. Twelve of the bits transmit-
ted during this clock cycle will contain the data for pixel number three in line one.
• This pattern will continue until all of the pixel data for line one has been transmitted.
• After all of the pixels in line one have been transmitted, the line valid bit will become low indi-
cating that valid data for line one is no longer being transmitted.
• On the pixel clock cycle where data transmission for line two begins, the line valid bit will
become high. Twelve of the bits transmitted during this clock cycle will contain the data for
pixel number one in line two.
• On the next cycle of the pixel clock, the line valid bit will be high. Twelve of the bits transmit-
ted during this clock cycle will contain the data for pixel number two in line two.
• On the next cycle of the pixel clock, the line valid bit will be high. Twelve of the bits transmit-
ted during this clock cycle will contain the data for pixel number three in line two.
• This pattern will continue until all of the pixel data for line two has been transmitted.
• After all of the data for the pixels in line two has been transmitted, the line valid bit will
become low indicating that valid data for line two is no longer being transmitted.
• The camera will continue to transmit pixel data for each line as described above until all of
the lines in the frame have been transmitted. After all of the lines have been transmitted, the
frame valid bit will become low indicating that a valid frame is no longer being transmitted.
Figure 2-4 shows the data sequence when the camera is operating in level-controlled exposure
mode.
Figure 2-5 shows the data sequence when the camera is operating in programmable exposure
mode.
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1
The data sequence assumes that the camera is operating in 12 bit mode. If the camera is
operating in 10 bit or 8 bit mode, only 10 bits or 8 bits of data per pixel will be transmitted.