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Panasonic Electronic Components Datasheet

MN6732741 Datasheet

Signal-processing IC for surveillance cameras and cameras for PC input

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MN6732741 pdf
Video Camera LSIs
MN6732741
Signal-processing IC for surveillance cameras and cameras for PC input
I Overview
The MN6732741 is camera signal-processing IC appropriate for a wide variety of applications, including
surveillance cameras and cameras used for input to personal computers. In addition to the basic functions of luminance
and chrominance signal processing, it also integrates the ALC, AWB, and AGC functions that were previously
implemented using microcontroller signal processing. Furthermore, it also integrates on a single chip, including SSG,
CG, and I2C-bus functions.
I Features
Input:
Analog signal (A/D converter input)
Outputs:
Digital output
8-bit YUV signal
Analog outputs
Luminance signal
Chrominance signal
Composite video signal output
RGB output
Operating supply voltage: 3.3 V ± 0.3 V
Operating clock frequency: 9.5 MHz to 28.7 MHz
Main functions
• 10-bit A/D converter
• Single-channel 10-bit D/A converter
• Two-channel 8-bit D/A converter
• Supports analog AGC (NN2038 or NN2039)
• CG and SSG circuits
• Supports 510 and 768 horizontal lines (NTSC and PAL)
• Supports VGA progressive scan readout CCDs (complementary color filters)
• Also supports black-and-white CCD signal processing
• CCD white defect/black defect correction circuit
• Digital AGC gain: up to 24 dB
• Left/right reversing function
• Variable gamma correction (γ = 0.3 to 1)
• ZV port standard mode, BT656 standard mode
• Modes: LL, SYNC, VD2, and HD/VD external synchronization support
• Built-in I2C-bus circuit
• ALC and AGC (Also supports external AGC)
• Two white balance modes (manual and ATW) with ATW lock function
• Automatic OB correction function
I Applications
Surveillance cameras, PC input cameras, multimedia cameras
Publication date: August 2001
SDB00060AEM
1


Panasonic Electronic Components Datasheet

MN6732741 Datasheet

Signal-processing IC for surveillance cameras and cameras for PC input

No Preview Available !

MN6732741 pdf
MN6732741
I Block Diagram
YUVOE
VIN
Horizontal
drive pulse
output
Vertical system
drive Sync system
pulse output
FCK
2FCK
10-bit
A/D
AGC
Y
Luminance
processing
C
Chrominance
processing
Y/C
MPX
ENC
10-bit
D/A
WB gain
RGB
CNV
CG
Carrier signal
YLPF
Digital AGC
control
SSG ALC
SUB control
ATN
FCK
2FCK
2
BLK
CSYNC
8-bit
D/A
Register R/W for each block
DATA
WE RE
I2C-bus control
PWM
PWM
PWM
PWM
YUVOE
YUV0
to YUV7
Y
COMP output
G
(2-ch)
R
C output, B
SCL
SDA
PWM0
PWM1
PWM2
PWM3
I Function Descriptions (by circuit block)
1. ADC
Converts the post-CDS CCD signal to a 10-bit digital signal.
2. PATGEN
Generates test pattern signals. This circuit generates horizontal and vertical patterns with a color bar (3 colors)
format. Since it simulates the output of the CCD 4-color complementary color filters, it conveniently allows prob-
lems in the analog block, from the CCD to the A/D converter, and IC internal problems, to be isolated. It can also be
used to temporarily halt CCD image output and generate a blue background signal.
3. AGC (AGC, pixel mixing, mirror reversal, and OB clamping functions)
Performs AGC control (up to +24 dB) digitally by linking with the ALC. Since the IC also provides an interface
output to an external analog AGC (NN2038 or NN2039), over 24 dB of gain can be provided.
When a VGA CCD is used, since progressive scan is used, the photodiode mixing operation used with earlier
interlaced CCDs is not required. The AGC circuit includes an internal pixel mixing circuit, and is designed for both
progressive and interlaced scan at the circuit level.
In the mirror mode provided by 510 H and 768 H CCDs, it is possible to generate a reversed video signal by
controlling RAM. OB correction is also performed in this block, and this function has both a digital mode, in which
processing is performed internally to the IC, and an analog mode that controls the external CDS and AGC IC clamp
voltage.
2 SDB00060AEM


Part Number MN6732741
Description Signal-processing IC for surveillance cameras and cameras for PC input
Maker Panasonic
Total Page 15 Pages
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