XRD98L59 Datasheet, PDF (19/37 Pages) Exar Corporation – CCD Image Digitizers with CDS, PGA and 10-Bit A/D

XRD98L59
Line N
Active Video
pixels
OB* pixels
CCD Signal
CAL
CLAMP
Min 1 Pixel
Vertical Shift
(Horizontal Clocking
Off)
Line N+1
Dummy &
OB* pixels
Active Video
pixels
Min 1 Pixel
* Note: OB = Optically Black or Shielded pixels.
Figure 12. Example of CLAMP & CAL Line Calibration Mode Timing
(CAL and CLAMP Polarity are Serial Port Programmable)
SDI = 0011 0001 0011
Line Timing: CAL Only
CAL Only Line Timing
(SDI address = 0011, D4 = 0)
The timing needed for "CAL Only" Line Calibration Mode
is shown in Figure 13. In "CAL Only" Line Calibration the
timing signal CAL has two functions, DC Clamping of the
CCDIN and REFin inputs and gating the auto-calibration
logic. Using "CAL Only" Line Timing enables the de-
signer to eliminate the requirement of providing a
CLAMP Timing signal to the XRD98L59.
Rev. 2.00
19