Samsung S5PC110, Manual

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S5PC110_UM 2 1BCAMERA INTERFACE
2-8
PCLK
DATA[7:0] Cr
FF 00 00 XY
Cb Y
FF 00 00 XY
Video timing
reference codes
Pixel data
Video timing
reference codes
Figure 2-5 ITU-R BT 656 Input Timing Diagram
There are two timing reference signals in ITU-R BT 656 format: one at the beginning of each video data block
(start of active video, SAV) and other at the end of each video data block (end of active video, EAV), as shown in
Figure 2-5
and
Table 2-3
.
Table 2-3 Video Timing Reference Codes of ITU-656 8-Bit Format
Data Bit Number First Word Second Word Third Word Fourth Word
7 (MSB) 1 0 0 1
6 1 0 0 F
5 1 0 0 V
4 1 0 0 H
3 1 0 0 P3
2 1 0 0 P2
1 1 0 0 P1
0 1 0 0 P0
NOTE:
F = 0 (during field 1), 1 (during field 2)
V = 0 (elsewhere), 1 (during field blanking)
H = 0 (in SAV: Start of Active Video), 1 (in EAV: End of Active Video)
P0, P1, P2, P3 = Protection Bit
The camera interface logic catches video sync bits like H (SAV, EAV) and V (Frame Sync) after reserving data as
“FF-00-00”.
Caution:
Do not combine all external camera interface IO signals with any other GPIO or bi-directional ports. It
is recommended to use all external camera interface IOs as Shmitt-Trigger type IO for noise
reduction.