Camera Interface
Basler A400k
2-29
DRAFT
Video Data Sequence for the A404k in an 8 Tap Output Mode
When the camera is not transmitting valid data, the frame valid and line valid bits sent on each
cycle of the pixel clock will be low. The camera can begin capturing a new frame while it is sending
data for a previously captured frame. It can also capture a frame and then send it before beginning
capture of a new frame. When frame valid becomes high, the camera starts to send valid data:
• On the pixel clock cycle where frame data transmission begins, the frame valid bit will
become high. 23 pixel clocks (460 ns) later, the line valid bit will become high.
• On the pixel clock cycle where data transmission for line one begins, the line valid bit will
become high. Eight data streams, D0 through D7, are transmitted in parallel during this clock
cycle. On this clock cycle, data stream D0 will transmit data for pixel one in line one. Data
stream D1 will transmit data for pixel two in line one. Data stream D2 will transmit data for
pixel three in line one. Data stream D3 will transmit data for pixel four in line one. Data stream
D4 will transmit data for pixel five in line one. Data stream D5 will transmit data for pixel six in
line one. Data stream D6 will transmit data for pixel seven in line one. Data stream D7 will
transmit data for pixel eight in line one.
• On the next cycle of the pixel clock, the line valid bit will be high. On this clock cycle, data
stream D0 will transmit data for pixel nine in line one. Data stream D1 will transmit data for
pixel ten in line one. Data stream D2 will transmit data for pixel eleven in line one. Data
stream D3 will transmit data for pixel twelve in line one. Data stream D4 will transmit data for
pixel thirteen in line one. Data stream D5 will transmit data for pixel fourteen in line one. Data
stream D6 will transmit data for pixel fifteen in line one. Data stream D7 will transmit data for
pixel sixteen in line one.
• This pattern will continue until all of the pixel data for line one has been transmitted. (A total
of 294 cycle.)
• Line valid becomes low for seven pixel clocks.
• On the pixel clock cycle where data transmission for line two begins, the line valid bit will
become high. On this clock cycle, data stream D0 will transmit data for pixel one in line two.
Data stream D1 will transmit data for pixel two in line two. Data stream D2 will transmit data
for pixel three in line two. Data stream D3 will transmit data for pixel four in line two. Data
stream D4 will transmit data for pixel five in line two. Data stream D5 will transmit data for
pixel six in line two. Data stream D6 will transmit data for pixel seven in line two. Data stream
D7 will transmit data for pixel eight in line two.
• On the next cycle of the pixel clock, the line valid bit will be high. On this clock cycle, data
stream D0 will transmit data for pixel nine in line two. Data stream D1 will transmit data for
pixel ten in line two. Data stream D2 will transmit data for pixel eleven in line two. Data
stream D3 will transmit data for pixel twelve in line two. Data stream D4 will transmit data for
pixel thirteen in line two. Data stream D5 will transmit data for pixel fourteen in line two. Data
stream D6 will transmit data for pixel fifteen in line two. Data stream D7 will transmit data for
pixel sixteen in line two.
• This pattern will continue until all of the pixel data for line two has been transmitted. (A total of
294 cycles.)
• After all of the pixels in line two have been transmitted, the line valid bit will become low for
eight cycles 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 and the line valid will become low indicating that a valid frame is no longer
being transmitted.
Figure
shows the data sequence when the camera is operating in edge-controlled or level-
controlled exposure mode and figure
shows the data sequence when the camera is operating
in programmable exposure mode.
Содержание A400K
Страница 1: ...Basler A400k USER S MANUAL Document Number DA00062410 Release Date 27 September 2007 ...
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Страница 25: ...Camera Interface Basler A400k 2 9 DRAFT Figure 2 5 A402k Camera Frame Grabber Interface ...
Страница 26: ...Camera Interface 2 10 Basler A400k DRAFT Figure 2 6 A403k Camera Frame Grabber Interface ...
Страница 27: ...Camera Interface Basler A400k 2 11 DRAFT Figure 2 7 A404k Camera Frame Grabber Interface ...
Страница 52: ...Camera Interface 2 36 Basler A400k DRAFT ...
Страница 154: ...Configuring the Camera 4 54 Basler A400k DRAFT ...
Страница 168: ...Troubleshooting 6 10 Basler A400k DRAFT ...
Страница 172: ...Feedback iv Basler A400k DRAFT ...
Страница 176: ...Index viii Basler A400k DRAFT ...