Datasheet

AD9923A
Rev. A | Page 46 of 84
VD
SUBCK
SUBCK PROGRAMMABLE SETTINGS:
1. PULSE POLARITY USING THE SUBCKPOL REGISTER.
2. NUMBER OF PULSES WITHIN THE FIELD USING THE SUBCKNUM REGISTER (SUBNUM = 3 IN THE ABOVE EXAMPLE).
3. PIXEL LOCATION OF PULSE WITHIN THE LINE AND PULSE WIDTH PROGRAMMED USING THE SUBCK1TOG REGISTER.
t
EXP
VSG
HD
t
EXP
05586-063
Figure 64. Normal Shutter Mode
VD
SUBCK
NOTES
1. SECOND SUBCK PULSE IS ADDED IN THE LAST SUBCK LINE.
2. LOCATION OF SECOND PULSE IS FULLY PROGRAMMABLE USING THE SUBCK2TOG REGISTER.
VSG
HD
t
EXP
t
EXP
0
5586-064
Figure 65. High Precision Shutter Mode
VD
S
UBCK
NOTES
1. SUBCK CAN BE SUPPRESSED FOR MULTIPLE FIELDS BY PROGRAMMING THE EXPOSURE REGISTER TO BE GREATER THAN 0.
2. ABOVE EXAMPLE USES EXPOSURE = 1.
3. TRIGGER REGISTER MUST ALSO BE USED TO START THE LOW SPEED EXPOSURE.
4. VD/HD OUTPUTS CAN ALSO BE SUPPRESSED USING THE VDHDOFF REGISTER = 1.
VSG
TRIGGER
EXPOSURE
t
EXP
05586-065
Figure 66. Low Speed Shutter Mode Using EXPOSURE Register