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December 7, 1999
Version 1.4
5
OV7910P/OV7410P/OV7411P
SINGLE IC CMOS COLOR & B/W PAL ANALOG CAMERAS
O
MNI
V
ISION
T
ECHNOLOGIES
, Inc.
Preliminary
1.1
Video Standards
Two TV standards are implemented and available as
output in the OV7910P/OV7410P/OV7411P imaging
devices: PAL (B). Table 2 below shows how to config-
ure the standard of choice. Please note
that the accuracy and stability of the crystal clock fre-
quency is important to avoid unwanted color shift in TV/
video systems.
1.2
Video Formats
The OV7910P/OV7410P/OV7411P image sensors
support a variety of formats including Composite
(CVBS), S-Video (YO/CO), RGB components, YUV
components, and B/W. Composite and S-Video signals
are generated from the internal TV encoder and the
RGB/YUV/BW outputs are generated from the color
matrix prior to entering the encoder.
The image sensor utilizes the RG/BG Bayer pattern
sending raw pixel data through the color matrix, creat-
ing RGB or YUV component signals. At the same time,
YUV signals are also processed to generate both com-
posite and S-Video signals. (Note: Color format config-
uration is valid only for the OV7910P image sensor)
1.2.1
Composite and S-Video
The Composite/S-Video format is the power-up default
Table 2. Standard Configuration
Standard
PAL
(pin 24)
Clock
Comments
PAL
1
17.734475 MHz
clock in = 4 x Fsc
configuration for the OV7910P/OV7410P/OV7411P
image sensors. Pins AMOD0/AMOD1 (pins 38 and 39)
select composite and S-Video formats. In this configu-
ration, RVCVO (pin 17) outputs CVBS, GYYO (pin 16)
outputs
the YO component of the S-Video signal, and BUCO
(pin 15) outputs the CO component. Table 3 below
summarizes the formats available and the settings
required on the appropriate pins.
1.2.2
RGB
Setting AMOD0 = 1 (w/AMOD1 = x) selects the RGB
format. In this configuration, RVCVO outputs the
Red component, GYYO outputs the Green component,
and BUCO provides the Blue component.
1.2.3
YUV
Setting AMOD0=0 and AMOD1=1 configures the
OV7910P/OV7410P/OV7411P sensors to operate in
YUV or B/W mode. In this configuration, GYYO outputs
the Y component, RVCVO provides the Cr component,
and BUCO outputs the Cb component. On the
OV7410P image sensor, only the GYYO (Y compo-
nent) output is valid.
1.
(Note: All references to color functions apply only to OV7910P image sensor)
Functional Description