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semiconductor product or service without notice, and advises its customers to obtain the latest
version of relevant information to verify , before placing orders, that the information being relied
on is current.
TI warrants performance of its semiconductor products and related software to the specifications
applicable at the time of sale in accordance with TI’s standard warranty . T esting and other quality
control techniques are utilized to the extent TI deems necessary to support this warranty.
Specific testing of all parameters of each device is not necessarily performed, except those
mandated by government requirements.
Certain applications using semiconductor products may involve potential risks of death,
personal injury , or severe property or environmental damage (“Critical Applications”).
TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES
OR SYSTEMS OR OTHER CRITICAL APPLICATIONS.
Inclusion of TI products in such applications is understood to be fully at the risk of the customer.
Use of TI products in such applications requires the written approval of an appropriate TI officer .
Questions concerning potential risk applications should be directed to TI through a local SC
sales office.
IMPORTANT NOTICE
In order to minimize risks associated with the customer’s applications, adequate design and
operating safeguards should be provided by the customer to minimize inherent or procedural
hazards.
TI assumes no liability for applications assistance, customer product design, software
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machine, or process in which such semiconductor products or services might be or are used.
Texas Instruments has developed the first in a series of programmable video
cameras that utilize its very-high-resolution TC216 and TC217 CCD image
sensors. Features of the MC-1134P camera include:
-
RS-170 monochrome video format
-
High-quality image
-
1134 (H) x 486 (V) active picture elements
-
Internal or external synchronization
-
Factory-programmable timing to address specific customer needs
-
Small tubular package
The MULTICAM MC-1134P system is intended for scientific, medical, and
industrial image data-processing applications. The camera employs the T exas
Instruments TC217 frame-transfer CCD image sensor, which features
551,124 active photosites and can generate a very-high-resolution image. The
MUL TICAM MC-1134P system’s three modes of operation are user selectable
through an external connector provided with the system. The system is also
capable of internal or external synchronization through the same auxiliary
connector.
The MC-1134P camera has a standard C-mount that allows use of a variety
of lenses. The MULTICAM MC-1134P system provides signals for auto-iris
control via an external connector; the mating cable for this connector is
included in the MULTICAM package. The camera can be secured with the
1/4 x 20 tripod mount provided or it can be clamped externally.
The MC-1 134P series includes options for connector location, automatic gain
control (AGC), and gamma correction (0.45/1.0). Other options can be made
available upon customer request. The standard model part numbers are
shown in the following table.
The MC-1134P camera unit should be handled in accordance with standard
precautions for electro-optic equipment. The camera should not be
mishandled by dropping or by exposure to excessive moisture. When not in
use, the camera unit should be stored in a dust- and moisture-free
environment and within the specified storage-temperature range.
The MC-1134P camera unit contains electrostatic-discharge-sensitive
components and should be handled accordingly. Specific guidelines for
handling assemblies of this type are contained in the publication
for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and
Assemblies
The MC-1 134P operates as a self-contained unit requiring no inputs other than
the dc-power-supply input. The MC-1 134P is designed to operate with little or
no operator adjustment after the initial setup period.
The following conditions are required for general operation:
-
Power applied to the camera
-
Video cable connected to the camera
-
Sufficient lighting provided
-
Camera aimed at the desired subject
-
Lens focus and aperture rings adjusted for the subject
4.2Camera Adjustment
The MC-1134P requires no internal adjustments. The only external
adjustments required in normal operation are to the lens focus and aperture.
These adjustments are dependent upon the scene being viewed.
The MC-1134P camera can be operated in either internal or external sync
mode. Internal sync mode is the default mode and requires no additional
connections. External sync mode operation requires that pin 2 on the auxiliary
connector be grounded. Vertical and horizontal drive signals should then be
applied to auxiliary connector pins 4 and 5, respectively . These drive signals
should not exceed CMOS voltage levels.
B-16
4.3External Operation
Odd Field
VD In
HD In
External Operation
T
Even Field
No reset during even field. Camera does not recognize a VD In if it coincides with 63.5/2
µs.
The normal light sensitivity mode provides true interlace
with 486 lines per frame and 1,134 pixels per line. After a 1/60 second
exposure of the 486 active lines in the image area, one field of 243 lines
becomes video; the other 243 lines are discarded. A subsequent 1/60 second
exposure produces the additional 243 lines to complete the interlaced frame.
LOW LIGHT: The low-light-sensitivity mode uses pseudo-interlace by
summing two adjacent lines after a 1/60 second exposure. The alternate
summing of lines provides two different fields for each frame. The summing
of two lines provides a 2:1 gain in light sensitivity. Pseudo-interlace mode
produces slightly less vertical resolution than true interlace mode.
DUAL FIELD:
The simultaneous field capture mode exposes the
486- x 1,134-pixel image area for 1/30 second. Both fields are exposed at the
same time, stored on chip and, after readout, form a frame having true
interlace without the time-dependent image offset that occurs with standard
field-mode operation. Due to the longer exposure time, the light sensitivity in
dual-field mode is equivalent to that in the low-light-sensitivity mode and the
higher vertical resolution of true interlace mode is preserved.
PROGRESSIVE SCAN:
This simultaneous field capture mode exposes the
486- x 1,134-pixel image area for 1/30 second. Both fields are exposed at the
same time, stored on chip, and then read out alternating between the two
fields. This forms a field of 1134 x 488 pixels having true interlace. This
information is read out in 1/30 second. The light sensitivity is equivalent to the
low-light-sensitivity mode due to the longer exposure time, and the higher
vertical resolution of true interlace is preserved. There is no frame readout in
this mode.
The TC217 is a frame-transfer charge-coupled device (CCD) image sensor
with two field memories. It is suitable for use in NTSC-video or still-picture
photography applications. Its image-sensing area is configured into 488 lines,
486 of which are active and 2 of which are used for dark reference. Each line
is configured into 1158 pixels of which 1134 are active and 24 are for dark
reference. The TC217 has a standard aspect ratio of 4:3 and a standard
11-mm image-sensing-area diagonal. Its blooming protection, which is an
integral part of each pixel, is based on electron-hole recombination and is
activated by clocking the antiblooming gate.
One important advantage of this high-resolution sensor is its ability to capture
both fields of a TV frame simultaneously. Its two independently addressable
memories allow separate storage of each field and operation in a variety of
modes, including RS-170 with true interlace, RS-170 with pseudo-interlace,
and nonstandard pseudo-interlace with a resolution of 972 lines.
A unique multiplexer section in the TC217 rearranges the horizontal pixels into
vertical groups of three and separates and loads the image into the two field
memories. The independent addressing of each field memory provides
flexibility for different modes of operation. The interdigitated layout of the
memories allows each memory to share the same bank of three serial
registers and associated charge-detection amplifiers. Each register and
associated amplifier reads out every third column of the image area. The three
amplifiers are optimized dual-source followers that allow the use of off-chip
double-correlated clamp-sample-and-hold amplifiers for removing KTC noise.
The TC217 is built using TI-proprietary virtual-phase technology, which
provides devices with high blue response, low dark signal, good uniformity,
and single-phase clocking. The TC217 is characterized for operation from
–10°C to 40°C.
Unlike a vidicon tube, the CCD is not a beam-current device, so there are no
shading magnets or focusing coils to adjust. The CCD imager is not
susceptible to burn in, so there is no need to check for sensor burn. It is a good
idea to turn the monitor off when it is not in use for long periods of time.
6.2Cleaning
The camera body , lens, and the CCD imager optical-glass window should be
kept clean and free of dust and grime. Keeping the lens and the CCD imager
window clean enhances the picture, ensuring better results in the camera
application. These surfaces can be cleaned with denatured alcohol and a
cotton swab. Extreme care should be taken when cleaning the thin opticalglass CCD imager window to avoid breaking or scratching the glass.
B-24
Running Title—Attribute Reference
Appendix A
Block Diagrams
This appendix contains functional block and interconnect diagrams for the timing/power/driver (TPD) board, the video processor board, and the CCD
board.
Figure A–4.Interconnect Diagram for TPD Board, Video Processor Board, CCD Board,
and Pin Connectors
Auxiliary
6
5
4
5
4
1
J21
4
1
J22
3
Power
Video
J20
J23
3
†
1
2
3
2
3
J1
4
5
6
Timing/Power/Driver (TPD) Board)
J2
1
2
2
3
4
87654321
J3
J4
5
†
†
1
2
3
J9
4
P3
87654321
12345678
P4
5
1
J8
2
Video Processor Board
1
1
2
3
J6
4
5
6
7
1
2
3
J5
4
5
12345678
6
CCD Board
1
2
3
J7
4
5
6
2
1
2
3
J10
4
5
6
†
Iris
†
See Section 3.1 for pin functional description.
Block Diagrams
B-29
B-30
Running Title—Attribute Reference
Appendix B
Timing Diagrams
This appendix contains detailed timing waveforms for several operating
modes, including high-light mode, low-light mode, still mode, progressive scan
mode, and parallel transfer.