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VS6724 Datasheet(PDF) 33 Page - STMicroelectronics

Part # VS6724
Description  2 Megapixel single-chip camera module
PDF  118 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VS6724 Datasheet(HTML) 33 Page - STMicroelectronics

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VS6724
Functional description
33/118
Prevention of false synchronization codes
The VS6724 is able to prevent the output of 0xFF and/or 0x00 data from being
misinterpreted by a host system as the start of synchronization data. This function is
controlled the bCodeCheckEnable register.
2.10.2
Mode 1 (ITU656 compatible)
The structure of an image frame with ITU656 codes is shown in
Figure 18.
Figure 18.
ITU656 frame structure with even codes
The synchronization codes for odd and even frames are listed in
Table 3 and Table 4. By
default all frames output from the VS6724 are EVEN. It is possible to set all frames to be
ODD or to alternate between ODD and EVEN using the SyncCodeSetup register in
the
Dither control register bank.
Table 3.
ITU656 embedded synchronization code definition (even frames)
Name
Description
4-byte sequence
SAV
Line start - active
FF 00 00 80
EAV
Line end - active
FF 00 00 9D
SAV (blanking)
Line start - blanking
FF 00 00 AB
EAV (blanking)
Line end - blanking
FF 00 00 B6
EAV
SAV
Frame of image data
Line 1
Line 480
Frame blanking period
9D
80
EAV
B6
SAV
AB



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