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PRELIMINARY
3.10 Data Bus
The 2K and 4K TDI cameras have 4 channels of 8-bit digital data in RS-644 (LVDS) format.
See Reference B of this manual for detailed information on RS644. Both 2K and 4K TDI
cameras output the clocking signals STROBE and LVAL.
3.10.1 STROBE
STROBE is an internal pixel clock inside the camera (fixed at 25 MHz) data rate. To
acquire valid data, frame grabbers usually latch to the rising edge of STROBE with LVAL
high.
3.10.2 LVAL (Horizontal Synchronization)
LVAL is a horizontal synchronization signal. When LVAL is in logic HIGH, the camera (2K
or 4K TDI) will be outputting valid data.
Fairchild Imaging • CAM/CCD-2KLV.TDI & CAM/CCD-4KLV.TDI Line Scan Camera User’s Manual • Rev 073004 • 25 of 38