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AD9920ABBCZ Datasheet(PDF) 74 Page - Analog Devices

Part # AD9920ABBCZ
Description  12-Bit CCD Signal Processor with V-Driver and Precision Timing Generator
PDF  112 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9920ABBCZ Datasheet(HTML) 74 Page - Analog Devices

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AD9920A
Rev. B | Page 74 of 112
VD
HD
SUSPEND
SYNC
73
5
NOTES
1. THE SYNC RISING EDGE RESETS VD/HD AND COUNTERS TO 0.
2. SYNC POLARITY IS PROGRAMMABLE USING SYNCPOL REGISTER (ADDR 0x13).
3. DURING SYNC LOW, ALL INTERNAL COUNTERS ARE RESET AND VD/HD CAN BE SUSPENDED USING THE SYNCSUSPEND REGISTER (ADDR 0x13).
4. THE SYNC RISING EDGE CAUSES THE INTERNAL FIELD DESIGNATOR TO INCREMENT.
5. IF SYNCSUSPEND = 1, VERTICAL CLOCKS, H1 TO H4, AND RG ARE HELD AT THE SAME POLARITY SPECIFIED BY OUT_CONTROL = LOW.
6. IF SYNCSUSPEND = 0, ALL CLOCK OUTPUTS CONTINUE TO OPERATE NORMALLY UNTIL THE SYNC RESET EDGE.
FIELD
DESIGNATOR
H1 TO H4, RG, XV1
TO XV24,
VSG, SUBCK
Figure 94. Normal SYNC (Default Mode 1)
5
1
2
3
4
1FALLING EDGE RESYNCS THE CIRCUIT TO THE LINE/PIXEL NUMBER 0. VD AND HD INTERNALLY RESYNC.
2RISING EDGE RESETS COUNTERS.
3VD IS DISABLED DURING SYNC. THE REGISTER IS PROGRAMMABLE.
4SCP, HBLK, AND CLPOB ARE HELD AT SEQ0 VALUE.
5XV1 TO XV24 SIGNALS ARE HELD AT THE V-OUTPUT START POLARITY.
SYNC
VD
VDLEN
HD
SCP
XV1 TO XV24
Figure 95. Enhanced SYNC Mode 2 with Vertical Signals Held at VTP Start Value



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