PRELIMINARY
®
Low Cost Digital Camera (LCDC) Chipset
CDSTV0680F-C: Rev 3.0; Mar.2000
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
Commercial in Confidence 1
STV0680A + VV6444/6410/6500
DESCRIPTION
STMicroelectronics (ST), Imaging Division (formerly VLSI
VISION Ltd.), has utilised its extensive experience in design-
ing imaging sensors for the digital still camera market to
dev elop chipsets for modular sys tems which will provide the
core of a highly cost-competitive new standard in consumer
digital stills cameras (DSC).
The Low Cost Digital Camera chipsets from ST, incorporat-
ing a CMOS imaging sensor and STV0680A co-processor
(formerly DCA1 ) enable camera manufacturers to offer an
end product which is genuinely price competitive with tradi-
tional ‘point and shoot’ film-based cameras.
The chipset provides the basis of an easy-to-use, user
friendly camera, which will be equally adaptable for use by
children and adults for stills photography or dual-mode use
(i.e. Digital stills while untethered, and videoconferencing
from the same camera).
Incorporating a wide range of features, the STV0680A
chipset offers e xc ep tion al performance at a very competit iv e
price point. ST’s aim is to enable manufacturers to offer fully
functional DSC products to the end consumer for between
$50 and $1 00. An ev alu ati on k it (EVK) a nd re fere nce des ig n
manual a r e av ail ab le, a s well as standard TWAIN and Video
for Windows drivers. A lternatively, a software development
kit (SDK) allows access to ST colour processing algorithms
under licence, to develop OEM software.
The chipset incorporates ST’s high performance VV6444/
6410 CIF (352 x 2 88 pixel) o r VV6500 VG A (640 x 480 pi xel)
resolution CMOS sensors. The complete camera will have
20 picture storage capacity for CIF resolution or 80 for QCIF
resolution, when using 16MBit memory. When using 64MBit
memory, it will have 26 picture storage capacity for VGA res-
olution or 106 for QVGA resolution. A standby mode which
allows full picture retention at extremely low system power
consumption gives a battery life of up to several months.
An example upload and colour processing time for a CIF
image to the PC is 0.3 seconds when the USB interface is
used, and the chipset also offers a high frame rate tethered
USB video mode (dependant on PC and USB loading).
The chipset supports a 2x 7-segment display showing num-
ber of pictures remaining, a low battery indicator, and opera-
tion mode, as well as a buzzer indicating picture taken,
camera full, and self-timer countdown.
A CMOS solution gives manufacturers inherent benefits, pro-
viding a highly integrated compact solution which has a low
system cost, is straightforward to implement, and has low
power consumption, giving long battery life.
KEY FEATURES
• CIF (352 x 288) or VGA (640 x 480) resolution sensor
• Using 64MBit memory, 80 picture storage capacity in
camera (CIF), 26 (VGA), or 320 (QCIF).
• Using 16MBit memory, 20 picture storage capacity, in
camera (CIF), or 80 (QCIF)
• USB/ RS 23 2 inte rfa ce opti on s
• Evaluation kit available
• Low power consumption (typically 75mA) for complete
camera and low system cost per pixel
• High speed picture upload with USB
• USB tethered video mode gives a QCIF resolution
videoconferencing camera with VfW support
• ‘Continuous’ mode for capturing image sequences (while
untethered) and downloading to AVI file format
• Memory refresh allows picture retention when camera is
in standby mode with very low current consumption
• TWAIN/Video for Windows driver support
• Numeric LCD panel supported
• Colour processing and pixel defect detection/correction
software available under license as SDK for development
of OEM software. The license to use the colour algorithm
(embedded in the PC driver software) is included in the
price of the chipset.
PRODUCT FORMATS
Chipsets: For manufacturers wishing to design their own
cameras ST offers chipsets combining the colour CMOS
sensor with a companion processor.
An evaluation kit, including PC demo software, and a
comprehensive reference design manual are available,
including schematics and bills of materials.
Modules: For high volume OEM companies, lensed camera
modules are available to the basic specification outlined, but
geared to the customer’s individual requirements, subject to
commercial agreemen t with ST.
SOFTWARE
Driver software is available to support both USB and RS232
interface, included in TWAIN and Video for Windows drivers
(VfW through USB only, WIN98). An AVI creator application
allows creation of video files from untethered ‘continuous’
mode images.
ST colour processing and defect detection/correction
software is supplied under licence agreement, as part of a
Software Development Kit (SDK). This runs on the host PC
under either Windows95TM or Windows98TM .
PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000 STV0680A + VV6444/6410/6500
CDSTV0680F-C
Commercial in confidence
2
This version: ST VIBU internal use only
CDSTV0680F-CTOC.fm
Table of Contents
1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Digital camera chipset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Co-processor choices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Sensor choices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.4 Key system features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4.1 Image features (STV0680A-002). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4.2 Image features (STV0680-001). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4.3 User features on camera. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.4.4 User features on PC software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.4.5 Power management features and USB compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4.6 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2. Detailed features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Sensor type and image formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.1 VV6444 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.2 VV6410 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.3 VV6500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.2.1 Push buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.2.2 LED indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.2.3 Picture counter using 2 x 7 segment display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.4 Piezo buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.3 Battery Level Detect and USB auto-switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 PC interface options and software support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4.1 USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4.2 RS232 (not available on STV0680-001) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.5 Anti-flicker exposure and gain control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3. Camera modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Standby mode (or USB suspend mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 ‘Snapshot’ mode (in High or Low resolution) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 ‘Continuous Capture’ mode (in High or Low resolution). . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Self-timer Mode (in High or Low resolution) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5 ‘Clear camera’. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.5.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000 STV0680A + VV6444/6410/6500
CDSTV0680F-C
Commercial in confidence
3
This version: ST VIBU internal use only
CDSTV0680F-CTOC.fm
3.5.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.6 ‘Change resolution’. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.6.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.6.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.6.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.7 Tethered USB Video mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.7.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.7.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.7.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.8 Powering the camera off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.8.1 Entering this mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.8.2 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.8.3 Exiting this mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4. STV0680A hardware interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 STV0680A pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.2 Sensor interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.3 Memory interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.1 SDRAM Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.2 SDRAM interface timing requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.3 SDRAM refresh Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.4 SDRAM initialisation Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4 USB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.5 UART module for RS232 interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.1 RS232 Physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.2 UART Module Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6 Power management and battery type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6.1 Power switching to USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.2 Switched sensor supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.6.3 Battery type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.7 Quartz Crystal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.8 Numeric LCD interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.1 LCD types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.8.2 LCD interface pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.9 Switches and LED’s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.9.1 MODE push button and SHUTTER push button: GPIO0 and GPIO1 . . . . . . . . . . . . 21
4.9.2 Input to select between 50 and 60Hz flicker frequency: GPIO3 . . . . . . . . . . . . . . . . 21
4.9.3 LED indicator output: GPIO5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.9.4 Unused pins: GPIO2, 4, 6, 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5. PC software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
5.1 Driver support available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3 OEM software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.4 Software Development Kit (SDK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.4.2 API Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6. Customisation options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7. Detailed chipset specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1 Typical camera specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000 STV0680A + VV6444/6410/6500
CDSTV0680F-C
Commercial in confidence
4
This version: ST VIBU internal use only
CDSTV0680F-CTOC.fm
7.2 STV0680/STV0680A companion processor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 VV6444 Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.4 VV6410 and VV6500 sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.5 Typical current consumption of complete camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.5.1 Using VV6444 (sensor operates at @ 5V DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.5.2 Using VV6410/6500 (sensor operates at @ 3.3V DC) . . . . . . . . . . . . . . . . . . . . . . . 33
8. STV0680A Pin descriptions and Package Information . . . . . . . . . . . . . . . . . . . . . . . 34
8.1 STV0680A Pin Listing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 STV0680A pinout diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.3 STV0680A Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9. Schematics and example parts list for complete camera design . . . . . . . . . . . . . . 40
9.1 Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
9.2 Example Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10. VV6444 Sensor Pinout and Package Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 VV6444 Pin Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10.2 VV6444 Pinout Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.3 VV6444 Package Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
11. VV6410 Pinout information and package dimensions . . . . . . . . . . . . . . . . . . . . . . 50
11.1 VV6410 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
11.2 VV6410 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
11.3 VV6410 package Details (36pin CLCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
12. VV6500 Pinout and pin descriptions (48pin LCC package) . . . . . . . . . . . . . . . . . . 54
12.1 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
12.2 VV6500 pin descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
12.3 VV6500 package Details (48 pin LCC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
13. Evaluation kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
14. Ordering details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
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Revision notes
The followin
g
chan
g
es have been included since revision 2.00.
• Removed all schematics and only show example parts list, instead referring to respective reference designs (in Section 9.)
• Documentation now refers to STV0680A which supercedes STV0680 - see Section 1.2 for explanation.
• Clarified which STV0680/680A variants and which PC opera ting systems offer VfW support and RS232 support, offering VfW
support - see Table 3.
• Updated STV0680A pin descriptions (pinout not changed) in Section 8.
• Confirmed user interface functionality in Section 3. and added Table 6 to show modes of operation and button functions.
• Sec tion 3.: Images ca ptured in both ‘Hi gh’ and ‘Low’ resol ution can be stored in camera memory at the same time. Ther efore
there is no need for images stored in memory to be cleared before changing image resolution.
• Changed IR filter recomm endation, see section Sect ion 2.1.1.
• Added approximate shutter speeds, in Table 10.
• Adjusted sensor image array sizes in Section 7. to the correct sizes.
• Upd ated orderi ng information in S ection 14.
• Updated current consumption information of STV0680, STV0680A, VV6444, and complete camera, see Section 7.2 and
Section 7.5.
• Added VfW framerates for STV0680A (Section 2.1).
• New order number STV0680A-002
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1. Introduction
1.1 Digital camera chipset
This document describes the features and functionality of a CMOS chipset, comprising an STMicroelectronics (ST) CIF or VGA
resolution sensor and an STV0680A companion processor (formerly known as DCA1: Digital Camera ASIC 1), as well as
outlining what peripheral components are required/supported in order to complete a camera using the chipset. Such a camera is
particularly suited to dual-mode digital stills or toy applications.
In stills mode, t he camer a s tores raw im ag e d ata in me mo ry. The c am era carries out no colour proc es si ng, en suring its s im pli ci t y
and low cost. Subsequent download of raw data to a PC for processing is done through an RS232 (not STV0680-001) or USB
interface, through demo software, a TWAIN driver, or OEM custom application. The license to use the colour algorithm
(embedded in the PC driver software) is included in the price of the chipset.
A video op tion i s provi ded, w hen te thered t hrou gh US B, which c an al low for Vid eo f or Wind ows appl icati ons, a nd ‘vi deo cl ips’ c a n
be recorded while untethered by continuously capturing images while in ‘Continuous’ mode, then downloaded to the PC for
playback, using software to create an AVI file.
Precise design guidelines are available from ST as a reference design (see Section 9.) A PC software development kit (SDK) is
available from ST, to interface to the camera and provide the basis for developing a custom software application for stills and/or
video, which includes colour processing software.
Figure 1 : Typical camera system block diagram
1.2 Co-processor choices
The following co-processor choices are available. The STV0680A supercedes STV0680, and uses different silicon and different
firmware compared to STV0680. Functionally it is exactly the same as STV0680 except that it supports a VfW driver. In addition,
a new firmware variant means that the STV0680A also supports VV6410 and VV6500 sensors, as well as 64Mbit memory size.
The firmware variant of STV0680 denoted by STV0680-001 does not support RS232 interface.:
Co-
processor Sensors
supported SDRAM
supported USB
interface RS232
interface
Video for
Windows
support
STV0680-001 VV6444 16Mbit onl
y
Yes No No
STV0680A-002 VV6444/6410/6500 16Mbit or 64Mbit Yes Yes Yes
Table 1 : Product choices
CM OS Sensor: Sensor data
STV0680A
USB interface
16M B it or 64M B it
SDRAM
VV6444/6410
RS232
I/F
USB
I/F
memor
y
I/F
R S232 interface
GPIO
Sensor
I/F
PWM
LED Indicator
6-9V B atter
y
e.
g
., P P 3 ,
(
CIF
)
VV6500
12M Hz X TAL
A udio I/F
Mini
LCD
Driver
2 x 7 se
g
. L C D
Push buttons:
Buffer A mp
Tran sce ive r
(
VGA
)
Low cost lens
Piezo
Mode Optional Optional
Optional
Buzzer
Shutter
speaker
3v3 suppl
y
(
STV0680A
)
Sw itched sensor suppl
y
(
5V for V V6444, 3v3 fo r VV 6410/6500
)
4-6 x AA, AAA, etc
Power
Mana
g
ement
Circuit
Detect Low
Batter
y
to P C
to PC
Circuit
Sensor clock
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1.3 Sensor choices
The following sensors are supported:
1.4 Key system features
The key feat ures of a typical camera based on t he STV0680A chipset are as follows:
1.4.1 Image features (STV0680A-002
)
• Support for 5V or 3.3V CIF resolution sensor (VV6444 or VV6410) - 352 x 288 pixels
• Support for 3.3V VGA resolution sensor (VV6500) - 640 x 480 pixels
• 80 picture storage capacity possible for CIF, with 64MB memory
• 26 picture storage capacity for VGA, with 64MBit memory
• A greater numbe r of images can be stored when ‘Low’ resolution mode is enabled (e.g. 80 QCIF images with 16Mbit memory,
106 QVGA images with 64Mbit memory). See Table 4 and Table 5.
• Automatic anti-flicker exposure and gain control
1.4.2 Image features (STV0680-001)
• Supports 5V CIF resolution sensor (VV6444) - 352 x 288 pixels.
• 20 picture storage capacity possible for CIF with 16MB memory.
• 80 picture storage capacity possible for QCIF with 16MB memory.
• Automatic anti-flicker exposure and gain control
1.4.3 User features on camera
• Self-timer mode allows a picture to be captured after several seconds.
• Twin 7 segment LCD panel supported - showing number of pictures left, and modes.
• Picture counter helps the user to know how much memory is left.
• Un-te ther ed ‘Conti nuous ’ mode a llow s captu re of ima ge sequ ences for st orag e in memory and sub seque nt downlo ad to PC.
• Piezo buzzer indicates a number of useful events to the user, e.g. whether enough light is present for picture capture, etc.
• Ind ic ator LED.
1.4.4 User features on PC software
PC so ftware allows a number of features, including fast downlo ad of thumbnail im ages for picture selecti on, and automatic
detection and correction of sensor defects. Table 3 clarifies the driver compatibility available, including:
• TWAIN driver to suit all TWAIN compatible imaging applications
• Vid eo for Windo ws driver for tet hered vide o mode (throug h USB), a va ilab le at all resolutio ns, with fastest fram erates at QCIF
resolution
Sensor Resolution Sensor suppl
y
volta
g
e
VV6444 CIF
(
352 x 288
)
5v
VV6410 3.3v
VV6500 VGA
(
640 x 480
)
Table 2 : Sensor choices with STV0680/STV0680A
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• AVI video file creation from image sequences captured in ‘continuous’ mode
Custom OEM s oftwa re can be de velop ed by usin g the SDK (fo r SDK a vaila bility, con tact S T), t o uplo ad thu mbnai ls/st ill imag es or
‘continuous’ images, e.g. for AVI file creation.
1.4.5 Power management features and USB compliance
• Picture retention with extremely low power operation, which appears to the user as if the camera is “switched off”.
• Auto power-off after 30sec with no user activity
• Operates from 6-9V battery, although system voltage is 5V or 3.3V, dependant on sensor.
• Low batt ery detec tion
• Depe ndant on hardw are configura tion, switc h-over to USB powe r supply is su pported, to all ow the device to operate with l ow
batteries or without batteries, when connected to USB.
• Ful l USB compl iance re quirement s are l isted in the USB spe cificatio n, howe ver, in a camera d esigned u sing thi s chips et, the
following must at least be included: (a) an SDRAM with sufficiently low self-refresh current, (b) USB inrush protection circuitry,
and (c) (in the case of VV6444 only) a switched 5V sensor supply is used, to maintain sufficient supply voltage to the 5V
sensor. See Sect ion 9. for fur ther details.
1.4.6 General features
• High speed picture download over USB
• ST Colour processing algorithms available under license (as part of drivers/SDK)
• USB or RS232 serial interface options, and VfW / TWAIN driver support.
• Customisation of STV0680A is possible to vary the features described in this document, subject to commercial agreement
with ST, see Section 6.
Interface type:
PC Operating system: RS232
Win9x, WinNT4, Win2k USB
Win98 and Win2k only
STV680-001 Not available TWAIN
STV0680A-002 TWAIN TWAIN, VfW
Table 3 : Driver choices
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2. Detailed features
2.1 Sensor type and image formats
The sensor type is auto-detected by STV0680A, which ensures that the correct sensor timing is enabled, and the correct image
resolutions are enabled, as shown in Table 4.
For s til ls ph otography, ‘ High’ or ‘Lo w ’ reso lu tion m od e can b e se lec ted, to g iv e C IF or Q CIF pict ures f r om a CIF sens or, an d VGA
or QVGA from a VGA sensor (see Table 4 and Section 3.7). Reduced resolution allows for storage of more images. Images
captured in both ‘High’ and ‘Low’ resolution can be stored in camera memory at the same time. Therefore there is no need for
images stored in memory to be cleared before changing image resolution.
Where USB is connected, the host PC software (through a Video for Windows driver) can activate tethered video mode,
regardless of the user inputs to the camera buttons. In this case, the image resolution is controlled by the PC driver..
2.1.1 VV6444
VV6444 is a CIF resolution, 5V CMOS imaging sensor. A brief specification is shown in Sect ion 7. VV64 44 has the sam e
functionality and array size as the un-microlensed VV6404 sensor, but has a microlensed array and different colour
characteristics. Although the VV64444 and VV6404 are electrically identical, the STV0680 and STV0680A use the correct
Sensor Sensor
Image Siz e Resolution
mode Final Image Size
Max. no . of
images
stored in
16MBit
memory
Max. no. of
images
stored in
64MBit
memory
Approximate
VfW framerate
(*)
VV6444/
6410 CIF 352 x 288 High CIF 352 x 288 20 80 9 frames/sec
Low QCIF 176 x 144
(Subsampled) 80 320
(see notes) 25 frames/sec
VV6500 VGA 640 x 480 High VGA 640 x 480 (6) 26 2 frames/sec
Low QVGA 320 x 240
(Subsampled) (24) 106 12 frames/sec
Tab le 4 : Image modes supported (STV0680A-002)
*Notes:
1. VfW framerate is dependant on PC performance and USB bus loading
2. Not all image sizes are supported by all STV0680/680A variants - see Table 2 for clarification.
3. A CIF cam era wi th STV0680A-002 and 64Mbit SDRAM can sto re up to 320 im ages b y using Q CIF mode . Where >9 9 images
are still available, the LCD display will remain at 99. Where (no. of images available) <99, the LCD display will show the
number of images available, as is the case with all other modes.
Sensor Sensor
Image
Size
Resolution
mode Final Image Size
Max. no . of
images
stored in
16MBit
memory
VV6444 CIF 352 x
288 High CIF 352 x 28 8 20
Low QCIF 176 x 144
(Subsampled) 80
Tab le 5 : Image modes supported (STV0680-001)
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settings for the VV6444 colour set. This means that a VV6404 should not be used with STV0680/680A.
For IR filter design, the best choice filter follows the GS0034 dielectric stack filter specification, which is available from ST. An
alternative, although not optimal filter, would be Schott S8612 doped glass, also sold as CM500.
2.1.2 VV6410
VV6410 is a CIF resolution, 3.3V CMOS imaging sensor. A brief specification is shown in Section 7.
A dual design to support VV6444 and VV6410 is not possible, since VV6410 is a 3v3 sensor. A dual footprint for VV6410 and
VV6500 is not possible since the package types differ, however, the same support circuit is used. See Section 9.
2.1.3 VV6500
VV6500 is a VGA resolution, 3.3V CMOS imaging sensor. A brief specification is shown in Section 7.
A dual design to support VV6444 and VV6500 is not possible, since VV6500 is a 3v3 sensor. A dual footprint for VV6410 and
VV6500 is not possible since the package types differ, however, the same support circuit is used. See Section 9.
2.2 User interf ace
The user interface supported by STV0680A comprises of user controls, audible signals and visual displays.
2.2.1 Push buttons
The foll owing are typic al of the type of fun ctions whic h are supporte d by the chips et. These func tions are ac hievable with no more
than 2 push buttons.
1. Mode b utto n (W ak e-up/Sw itch betw een mode s): This b utton al lows th e user (1.1) t o wak e the c amera u p from sta ndby mode
when the camera is to be used for taking pictures, or (1.2) to switch between modes of operation shown in Section 3..
2. Shutter button (Shutter/confirm action): This button allows the user to take a picture or confirm an action, as shown in Sec-
tion 3.
The modes of operation are described in Section 3.
2.2.2 LED indicator
An LED display camera status, i.e. to show that the camera is in ‘Snapshot’ mode.
2.2.3 Picture counter using 2 x 7 segment display
STV0680A stores a picture counter value, which shows how many images can still be captured. STV0680A supports a 2x7
segment LCD panel. In ‘Snapshot’ mode and continuous capture mode, this LCD panel displays the number of pictures still
available, which is useful to identify when the user is approaching the maximum number of images which can be stored (see
Table 4 and Table 5). It is possible to clear the images stored in memory, in order to continue taking pictures, as shown in Table
6. In other modes, this LCD panel shows displays a 2-character code as shown in Table 6, which helps the user to navigate
around the modes.
Note: A CIF camera with STV0680A-002 and 64Mbit SDRAM can store up to 320 images by using QCIF mode. Where >99
images are still available, the LCD display will remain at 99. Where (no. of images available) <99, the LCD display will show the
number of images available, as is the case with all other modes.
For suitable numeric LCD panel types, see Section 4.8.
2.2.4 Piezo buzzer
An on-chip Pulse Width Modulator (PWM) on STV0680A is used to generate buzzer sounds to signal certain events. The
following are typical of the type of events which are indicated by the buzzer, and each has its own distinctive sound:
1. Camer a ha s be en ‘Woken up’ fro m stand by mode (either b y the us er pres s ing a b u tton , by re-con nec ti ng the power source,
or by connecting a USB/RS232 connection).
The precise functionality of the user interface may vary from that of existing demonstration units. The
version shown here is close to the actual functionality available in STV0680A.
! Note
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2. Camera has been ‘gone to sleep’ i.e. moved into standby mode. Pictures are retained in memory.
3. Picture has been successfully taken after the user presses the capture button.
4. Picture has NOT been taken after the user presses the capture button. This indicates to the user that there is insufficient
light, or that the exposure control was not ready due to a rapid change of lighting in the scene.
5. Picture ha s NOT been ta ken after the u se r p r ess es th e c apture button, due t o p ic ture count er h av ing reached the m axi mu m
number of images. The user has the chance to zero the counter if desired.
6. End of continuous capture in un-tethered ‘Continuous’ mode, due to memory full.
7. Self-timer activated and counting down.
2.3 Battery Level Detect and USB auto-switch
An on-chip battery level detector on STV0680A detects when the battery voltage falls below a threshold. This threshold is
determined by the designer, dependant on the perception of what remains as ‘acceptable’ image quality as the battery voltage
falls. The c hos en th res hol d level is dete rmined b y a res is tor va lue, as s hown in Sect ion 9 . Where n o US B ha s been de tec ted , the
LCD display flashes, which indicates that the battery is low. Where a USB connection has been detected, the camera sources
power from USB, if certain additional hardware is fitted.
Note: It may be a require ment of certa in USB compl iance tests tha t such additi onal ha rdware is in clude d in the camera design, in
order to enable the camera to switch to supply from USB and hence report back to the PC while connected to the USB bus
without a battery.
2.4 PC interface options and software support
Either USB Interface (full speed 12Mbit/sec max.) or RS232 interface (115.2Kbaud) is supported by the chipset, with driver
software available from ST for both. The interface type is auto-detected by the chipset. PC software can be one of the following
(exact compatibility is clarified in Table 3):
1. Simple image upload demonstration software supplied by ST, allowing uploading of stills or ‘continuous’ images. This soft-
ware should not be supplied as an end-user product.
2. TWAIN driver to suit all TWAIN compatible imaging applications
3. Video for Windows driver for tethered video mode (USB only)
4. Custom e nd-user soft ware d evelop ed by OEM using SDK (for SDK a vailability, conta ct ST). Th e SDK is sup pl ied by ST as a
32-bit DLL format, running on Win do ws 9 8, and acces sed t hrough a docu mente d softw ar e inte rf ace . T his pro vide s the b asis
for developing a custom software application for uploading stills and/or video. See Section 5. for further details.
2.4.1 USB
Complete images (displayed as either thumbnails or in full resolution), or the entire SDRAM contents (e.g. for uploading
continuously captured image sequences, recorded using ‘Continuous Capture’ mode) can be downloaded through USB, and
USB connection also allows for tethered video mode to be activated by the USB driver.
Thumbnail image download is extremely fast for the entire memory contents in the camera. Once a picture is selected for
download, full image download takes approximately 0.15 seconds per image for a CIF image (0.6 seconds for a VGA image),
plus post processing time per image.
For USB interface details, see Section 4.4.
Note: Actual USB download and post processing time also depends on PC performance and USB bus loading
2.4.2 RS232 (not a vailable on STV0680-001)
Thumbnails of images, complete stored images, or the entire SDRAM contents can be downloaded through RS232, but tethered
video is not supported.
Once a pictu re is s elec ted for down load, full im age d ownloa d take s appr oxi matel y 10 s econ ds per im age fo r a C IF ima ge (arou nd
30 seconds for a VGA image), plus post processing time per image (of the order of 1 second approximately).
For RS232 interface details, see Section 4.5.
Note: Actual post processing time after RS232 download also depends on PC performance
2.5 Anti-flicker exposure and gain control
The chipset operates automatic exposure and gain control for either 50Hz or 60Hz mains-driven indoor lighting, using the same
12MHz crystal. This improves picture quality by selecting a set of exposure values which minimise ‘flicker’ effects. Detection of
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the mains frequency is dependant on the status of the GPIO3 pin, which can be achieved by population of a PCB link at a late
stage in production, once the country of destination is known, without the need to change the crystal frequency.
The auto exposure and gain algorithm is always enabled during ’Snapshot’/self-timer/continuous mode. When the shutter button
is presse d in ‘Snap shot’ mode, th e chips et capt ures an im age if th e expos ure and gain val ue has re ached a suitable v alue for the
current scene. If the light detected has suddenly changed, the camera may emit an audible tone to indicate that more time is
required to reach the correct exposure target. In ‘Snapshot’ mode the chipset only captures the image data if sufficient light is
present in the image. In continuous capture mode, the chipset captures images regardless of whether enough light is present.
Note: Auto-detect of the mains lighting frequency is not currently supported.
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3. Camera modes of operation
The above modes are interrupted by the detection of a USB or RS232 connection. This is to allow for the possibility that the PC
driver takes control of the chipset (e.g. when starting a VfW application through USB).
3.1 Standby mode (or USB suspend mode)
3.1.1 Entering this mode
The cam era ent ers st andby mode aut omatical ly af ter 30 s econ ds of inacti vity if not tethere d to U SB, or w hen USB suspe nd mo de
is activated by the PC driver.
3.1.2 Description
This allows image data to be stored in memory with extremely low power consumption, which appears to the user as if the
camera is switched ‘off’, since there is no LCD display or LED lit. In VV6444-based designs, STV0680A powers off the sensor
completely, in VV6410/6500 based designs, the sensor is placed in suspend mode, and the camera enters a mode where only
SDRAM refresh is carried out. The shutter button is inactive in standby mode.
3.1.3 Exiting this mode
Wake-up from standby mode is achieved by any of the following means:
1. Pressing the ‘mode’ button (only if no USB detected)
Mode If shutter button pressed while in
this mode
If mode button
pressed while in thi s
mode
If no further
action LCD
displays
Standby
mode No function - pictures cannot be taken in
standby mode Wakes up camera into
‘Snapshot’ mode Remains in
stand by mode (D isplay is
blank)
’Snapshot’
mode Takes one picture, if sufficient light availa-
ble, then returns to ‘Snapshot’ mode Moves to continuous cap-
ture mode Stays in ‘ Sna p-
shot’ mode for
30 seconds then
moves to
stand by mode
Number of pic-
tures still avail-
able to take
Continu-
ous cap-
ture
Takes a picture every 80mS while button
pressed, regardless of light av ailable, then
returns to ‘Snapshot’ mode
Moves to self timer mode Returns to
‘Snapshot’ mode
after 5 seconds
Number of pic-
tures still avail-
able to take
Self timer Takes one picture after a 10 sec ond count-
down, if suff icie nt light available, then
returns to ‘Snapshot’ mode
Moves to ‘Clear camera’
mode “St”
’Clear
camera’ (1st press :)
Prompts user to
clear camera
(
2nd press:
)
Clears all
ima
g
es stored in cam-
era, then returns to
‘Snapshot’ mode
Moves to ‘Change resolu-
tion’ mode (see note) “CL”
’Change
resolution’ Chan
g
es resolution (i.e. Low to High, or
High to Low) and returns to ‘Snapshot’
mode
Returns to ‘Snapshot ’
mode If currently in
Low Resolu-
tion: “Hr”
If currently in
High resolu-
tion: “Lr”
Table 6 : Camera modes
Note: In STV0680-001, pressing the Mode button while in ‘Clear Camera’ mode only moves onto ‘Change resolution’ mode if the
camera has no images stored. This is because in STV0680-001, mixed resolutions (i.e. ‘High’ and ‘Low’) cannot be stored at the
same time. In STV0680A-002, mixed resolutions can be stored at the same time.
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2. RS232 receives start bit from host software (only if no USB detected
)
3. USB connection detected
4. If in USB susp end mode, USB driver re -starts communic ations with the camera as per USB specification
3.2 ‘Snapshot’ mode (in High or Low resolution)
3.2.1 Entering this mode
This is the default mode on wake-up when not tethered to the PC, i.e. pressing the Mode button while in standby mode, or
powering up the camera. On entering this mode, the current resolution (i.e. ‘Hr’ or ‘Lr’) is displayed briefly, and there is a brief
pause (approx. 1second) during which pictures cannot be taken. This is to allow the Auto-exposure and Gain control to settle.
The LCD then displays the number of pictures still available.
3.2.2 Description
Using the shutter button, ‘Snapshot’ mode allows single pictures to be grabbed using the capture button. The LCD displays the
number of pictures still available. Auto-exposure and gain are continuously enabled. The camera grabs an image when the
capture button is pressed, if sufficient light is available, the exposure and gain algorithm is settled, and picture counter has not
reached its maximum. Image data is stored in memory and picture counter is decremented.
3.2.3 Exiting this mode
After 30 seconds of non-activity, while not tethered to the PC, the camera goes into Standby mode.
3.3 ‘Continuous Capture’ mode (in High or Low resolution)
3.3.1 Entering this mode
Enabled using the mode button (from ‘Snapshot’ mode, press once).
3.3.2 Description
The LCD displays “Ct”. Auto-exposure and gain are continuously enabled. While the shutter button is pressed, the user can
activate continuous capture at approx. 12.5 frames per second, to allow recording of a ‘video’ sequence, whether or not the
camera is tethered to the PC, and regardless of whether enough light is available. The picture counter is decremented once per
frame. The co ntinuo us ima ge data is stored i n memor y and can then be dow nloa ded to the PC. Once the memory is fu ll, the us er
is alerted by an audible tone. It is possible to store a mixture of still images and ‘Continuous’ images in memory.
3.3.3 Exiting this mode
After 5 seconds of non-activity, or after releasing the shutter button, the camera returns to standby mode.
3.4 Self-timer Mode (in High or Low resolution)
3.4.1 Entering this mode
Enabled using the mode button (from ‘Snapshot’ mode, press twice).
3.4.2 Description
The LCD di splays “St ”. Auto-exposure and gain are continuo usly enable d. When the s hutter butto n is pressed, t he camera counts
down 10 seconds, then grabs an image, if sufficient light available and exposure and gain algorithm settled, and picture counter
has not reached its maximum. Image data is stored in memory and picture counter is decremented.
3.4.3 Exiting this mode
After 5 seconds of non-activity, or after the timer has counted down 10 seconds, the camera returns to standby mode.
3.5 ‘Clear camera’
3.5.1 Entering this mode
Enabled using the mode button (from ‘Snapshot’ mode, press three times).
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3.5.2 Description
The LCD displays “CL”. Pressing shutter button twice will clear all the images in the camera.
3.5.3 Exiting this mode
After 5 seconds of non-activity, or after the camera has been cleared, the camera returns to standby mode.
3.6 ‘Change resolution’
3.6.1 Entering this mode
This is enabled using the mode button (from ‘Snapshot’ mode, press four times).
Note: In STV0680-001, the images stored in memory must be cleared before this mode can be entered. This is because in
STV0680-001, mixed resolutions (i.e. ‘High’ and ‘Low’) cannot be stored at the same time.
3.6.2 Description
The LCD display s the target resolution to whic h the camera can be changed, i.e. if in High resolution “Lr” (Low reso lution) is
displayed, if in Low resolution, “Hr” (High resolution) is displayed. ‘High’ resolution stores the full image resolution from the sensor
array, while ‘Low’ subsamples the sensor array, to store 4x the number of images (e.g. 80 in QCIF mode, compared to 20 in CIF
mode).
Depend ant on t he ty pe of s en so r us ed, diff erent resoluti ons are obt ained, se e Ta ble 4 o r Tab le 5 . By pres s ing the sh utte r button,
user changes the resolution.
3.6.3 Exiting this mode
After 5 seconds of non-activity, or after the resolution has been changed, the camera returns to standby mode.
3.7 Tethered USB Video mode
3.7.1 Entering this mode
This is ac tivate d by the PC Video for Win dows driv er w hi le the cam era is tethe red, de pe nda nt on whet he r VfW is supported (see
Table 3).
3.7.2 Description
The camera is controlled by the PC driver.
Note: Any images or continuous image sequences contained in the camera are lost when the video for Windows driver starts.
3.7.3 Exiting this mode
This is controlled by the PC drivers.
3.8 Powering the camera off
3.8.1 Entering this mode
This is not truly a mode of operation, but a description of what happens if:
• The battery power and USB connection are removed from the camera
• The battery power is removed, and the PC to which the camera is tethered, is switched off.
• The b attery v olt age falls ex tremely l ow. Way s of avo idi ng this situation a re disc us sed in th e reference de si gn, see Se cti on 9.
Note: norma lly a cam era w i th USB in terfa ce sho ul d so urc e po wer fro m th e U SB co nne ct ion , but this is hard w are dep end ant, see
Section 9.
3.8.2 Description
In this situation, all image data is lost.
Note: under certain circumstances, the image data may be maintained if the camera or PC is powered on again after a few
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seconds, although this is not guaranteed).
3.8.3 Exiting this mode
When the ca mera is po wered on agai n, either when the battery is re-fitted, or t he USB is re-con nected, or th e PC is re-starte d, the
camera will power up into standby mode, High resolution, with all images available.
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4. STV0680A hardware interfaces
4.1 STV0680A pinout
The STV0680A pinout has been carefully developed to minimise the physical size of the support printed circuit board by
facilitating placement of and electrical routing to peripheral support components such as the SDRAM. The complete pinout and
listing is shown in Section 8.
4.2 Sensor interface
STV 0680A uses a standard ST digital interface from the sensor, and the sensor clock input is provided by an output from
STV0680A. Designing a camera using this chipset should design as close as possible to the reference design (Section 9.), in
which cas e the chipset can be regarded as a functional ‘black box’, and no fur ther details regarding the STV0680A -sensor
interface are required.
4.3 Memory interface
STV0680A is d es ign ed to in terfa ce to an ex te rnal 16Mbit or 64M bi t SDR AM (s ee Ta ble 4 an d Table 5 ). T he SD RA M dev ic e mu st
have a 16 bit wide d ata bus an d operate fro m a 3.3V sup ply. Two sizes o f SDRAM mem ory are sup ported by ST V0680A, 16M Bits
(1M x 16 bits wide) or 64MBits (4M x 16 bits wide), the memory size is auto-detected by STV0680A. STV0680A clocks the
SDRAM a t 6M Hz, ty pi ca lly this is wel l be low th e figures of fere d by mo st m an ufac turers’ de vic es . Dev ic es wh ic h are PC 66 a nd/o r
PC100 compliant are preferred. For interface wiring, see Section 9.
4.3.1 SDRAM Current consumption
For ma ximum sys tem battery life while no pict ures are b eing take n, and to as sist in m eeting req uirements for USB compl iance, an
SDRAM should be chosen with the lowest possible self refresh current specification. For suggested SDRAM part numbers, see
Section 9.
4.3.2 SDRAM interface timing requirements
The following timing diagrams should be referred to when selecting SDRAM other than those recommended in Section 9.
DCLK
Command
DQM
A0-9,BA
A10
ACTIVE READ NOP PRECHARGE NOP
ROW COLUMN
ROW
DOUT M DOUT M + 1 DOUT M + 2 DOUT M + 3
DQ
READ Latenc
y
tCK
t
RCD
t
RC
CKE
t
RAS
DQ sample DQ sample DQ sample DQ sample
t
RP
tCMS tCMH
tAS tAH
tLtH
tCMS tCMH
t
AC
t
OH
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Figure 2 : SDRAM Read Timing (16Mbit device, b urst read)
Figure 3 : SDRAM Write Timing (16Mbit device, burst write)
Table 7 : Timing parameters for SDRAM read/write
4.3.3 SDRAM refresh Period
The SDRAM refresh period from STV0680A is guaranteed to be no greater than 15.6µS during ‘Snapshot’/self-timer/continuous/
tethered video modes of operation (i.e. not standby mode). In standby mode, the SDRAM is set to self-refresh, therefore no
S
y
mbol Min Max Units S
y
mbol Min Max Units
tCK 166.45 166.89 ns tDS 81.01 ns
tCH ½t
CK tDH 83.41 ns
tCL ½t
CK tRCD 1t
CK
tAC ½t
CK tRAS 55t
CK
tOH 0nst
RC 7t
CK
tCMS 82.88 ns tRP 2t
CK
tCMH 82.85 ns tRCD 1t
CK
tAS 82.88 ns tAH 82.76 ns
DCLK
Command
DQM
A0-9,BA
A10
ACTIVE WRITE NOP PRECHARGE NOP
ROW COLUMN
ROW
DIN M DIN M + 1 DIN M + 2 DIN M + 3
DQ
tCK
t
RCD
t
RC
CKE
t
RAS
t
RP
tCMS tCMH
tAS tAH
tLtH
tCMS tCMH
t
DS
t
DH
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refresh from STV0680A takes place.
4.3.4 SDRAM initialisation Period
The SDRAM initialisation period is currently set to 981µS in STV0680A.
4.4 USB interface
STV0680A includes a USB Version 1.1 compliant Universal Serial Bus Interface, including a transceiver. This allows direct
connect ion from STV068 0A to a USB conn ector w ith minim al addi tional hardware (i. e. a smal l nu mber of pa ssive di screte s) - see
Section 9.
The USB interface interfaces the STV0680A to the USB at full speed 12MHz data rate. Some of the features are:
• Compliant with USB protocol revision 1.1.
• USB protocol handling.
• USB devi ce state handli ng.
• Clock and data recovery from USB.
• Bit stripping and bit stuffing functions.
• CRC5 checking, CRC16 generatio n and checking.
• Serial to parallel conversion.
• Single bulk end point.
USB drivers are supplied by ST. For USB timing information, please refer to the USB specification V1.1.
4.5 UART module for RS232 interface
The UART module on STV0680A provides a 115200 baud full duplex interface to an external Host.
4.5.1 RS232 Physical interface
STV0680A does not support direct connection to a serial link. Physical line driver circuitry is required, e.g. using a standard
RS232 transceiver chip, or by using a small number of low cost discretes (as shown in Section 9.). The schematics shown
assume a 3 core cable with a length of no greater than 2m. Unscreened cable can be used, a suitable low cost connector is a
3.5mm audio jack plugs/sockets.
4.5.2 UART Module Overview
Receiving data
The UART module in STV0680A receives serial data through the RXD pin. Data reception is initiated by a 1-to-0 transition on
RXD, and the received data is sampled every 8.66µS.
If the RXD input is not 0 when the incoming data is first sampled, the UART module goes back to look for another 1-to-0
transition. This is to provide rejection of false start bits. If the start bit proves valid, reception of the rest of the frame will proc ee d.
Transmittin
g
data
When a transmission is activated by STV0680A, the contents of an internal transmit shift register are shifted onto the TXD pin,
every 8.66µS.
The UART operates at 12MHz, which is not an integer multiple of 115200, so the actual baud rate is 115232 +/- 0.3%, which is
well within the requirements of a typical 16x oversampling UART, which can tolerate a 3.75% error in baud rate.
4.6 Power management and battery type
STV0680A and the SDRAM require a 3.3V supply. Where a VV6410 or VV6500 (3.3v) sensor is used, a single voltage regulator
can be us ed to re gulate the supply for all three c omponent s fro m the batte ry, or the sens or on-bo ard VReg c an be us ed. Where a
VV6444 is used, the sensor requires a 5V supply, hence a DC-DC converter is recommended to provide enough voltage when
the camera is powered from the USB bus. These are explained more fully in the reference design.
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4.6.1 Power switching to USB
Included in the USB compliance requirements, is the ability of the camera to report to the PC when connected to the USB bus,
whether or not there is a fresh batte ry in the camera. This mea ns that pow er so urcing f rom U SB is require d, w hich also s aves on
battery life while the camera is used in USB tethered video mode. In order to allow switching from battery to USB power, some
addition al hard w are is requ ire d (see als o Sect ion 9.):
• The USBDETECT input to STV0680A is used to detect that a USB power supply is connected
• If the USB is detected, additional hardware is used to switch off the battery
• An in rush protection ci rcuit can protec t the USB bus from cur rent draw in the cas e of a low battery/ba ttery not fitted. Th is may
be necessary to comply with the USB specification.
• For precise USB compliance requirements, please consult the USB specification version 1.1
4.6.2 Switched sensor supply
Dependant on the hardware implementation, the SENSPWR output from STV0680A can be used to power off completely the
sensor during Standby mode (in the case of VV6444) or put the sensor into Suspend mode (in the case of VV6410/6500). This
has a significant improvement on battery life.
4.6.3 Battery type
This is hardware dependant. The schematics referred to in Section 9. assume either three or four 1.5V cells.
4.7 Quartz Crystal
Regardless of the sensor type or anti-flicker requirements, the sensor + STV0680A chipset operates from a single 12MHz
fundamental quartz crysta l. For specification requirements , see Table 15. STV0680A i ncludes an on-chip low jitter PLL, f or PLL
characteristics, see Table 14.
4.8 Numeric LCD interface
STV0680A supports a 2-digit LCD panel only, for alpha-numeric display.
4.8.1 LCD types
STV0680A connects to a non multiplexed, direct drive LCD with 2 x 7 segments. Many LCD types are compatible with this
interface. The LCD refresh fre
q
uenc
y
is 34.7Hz.
4.8.2 LCD interface pinout
'0' con nects to s egmen t 'a', '1' conn ects to segme nt 'b', and so on, where a to g ar e stand ard for all 7-segm ent dis play s, as w ell as
an LCD common output, giving fifteen si
g
nals in total.
4.9 Switches and LED’s
The GPIO lin es o n STV0 68 0A ha ve pre-d efi ned fun cti ons as fol lows , s ee Se cti on 2 . 2 fo r us er in terf ac e fun cti on ali ty, and Sec tion
9. for precise hardware implementation.
4.9.1 MODE push button and SHUTTER push button: GPIO0 and GPIO1
Both push button inputs have internal de-bounce circuits, reducing the amount of hardware required externally. It is
recommended that labelling is used on the camera casing to help the user understand the functioning of the 2-button interface.
4.9.2 Input to select between 50 and 60Hz flicker frequency: GPIO3
This allows for factory setting of the anti-flicker frequency, dependant on the final country of destination. See also Section 2.5.
The polarity of this selection is detailed in the reference design (see Section 9.).
The precise functionality of early demonstration units may vary from the actual user interface supported
by STV0680A.
! Note
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4.9.3 LED indicator output: GPIO5
The LED output has an 8mA current sinking capability.
4.9.4 Unused pins: GPIO2, 4, 6, 7
These should be tied to GND.
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5. PC software
5.1 Driver support a vailable
5.2 Demonstration software
The followin
g
is supplied with evaluation kits/demonstration units
(
This so ftware is ma inl
y
for demo nst ration p urpose s and s hould
NOT be supplied as an end-user product.
)
:
1. Simple demonstration software for uploadin
g
thumbnails and ima
g
es.
2. Video demonstration application for STV0680-001 tethered “video” mode throu
g
h USB
(
WIN 98 onl
y)
(
NOT VfW compati-
ble
)
. This is not re
q
uired for STV0680A, which can be used with standard VfW drivers.
3. AVI creator software for uploadin
g
continuous ima
g
es for creatin
g
‘movie’ clips.
5.3 OEM software
OEM’s have the followin
g
options for productisation of a camera based on the chipset:
1. TWAIN driver for uploadin
g
ima
g
es, this wo uld allow the camera to be bundled with standard TWAIN compati ble ima
g
in
g
software.
2. Vid eo for W ind ows driv er f or te the r ed v id eo mod e th rou
g
h USB
(
WIN 98 & WIN2 K onl
y)
. This would allow the camera to be
bundled with standard video for windows software.
3. Development of custom end-user software, includin
g
the ST colour process, developed under license usin
g
the SDK.
5.4 Software Development Kit (SDK)
5.4.1 General
A software development kit is supplied by ST under license agreement, which allows the OEM to develop a custom application
which can perform picture download, thumbnail display, and colour processing. This supports Windows95TM (Serial interface
only) or Windows98/Win2KTM (Serial or USB), and includes features such as:
• Very fast download (through USB) and colour display of image thumbnails for picture selection
• Download of full image once selected by user software
• Colour processing of full image, using the ST colour process
• Automatic detection and correction of sensor defects
The SDK is supplied by ST as a 32-bit DLL format, running on Windows 98/Win2KTM, and accessed through a documented
software interface. This provides the basis for developing a custom software application for stills and/or video.
The ST SDK for the chipset comprises the following:
• Interface library containing all Application Programmer’s Interface (API) functions. Provided as C library and header files.
• All driver files necessary for chosen communications link (supplied as DLL and SYS files).
• Documentation of all API functions including example code fragments.
All software is built as 32-bit modules for Windows 98/Win 2K. Th e serial communicati ons link is also supported for Windows 95.
A development environment of Microsoft Visual C++ v5 or higher is assumed.
Interface type:
PC Operating system: RS232
Win9x, WinNT4, Win2k USB
Win98 and Win2k only
STV680-001 Not available TWAIN
STV0680A-002 TWAIN TWAIN, VfW
Table 8 : Driver choices
With STV0680, a simple video.exe applica tion is provided. Whilst not bein
g
a VfW application, it
g
ives
sufficient framerate to allow for camera test, lens focussin
g
, etc.
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5.4.2 API Overview
All OEM application software communicates with the camera by means of the API as illustrated in Figure 4.
Figure 4 : Software interface
The user application, API and drivers all run on the host PC. The drivers communicate with the camera by the chosen
communications link (either serial or USB). The core API functions allow for:
• The camera to be opened and closed as a device under the operating system
• Query of camera information and configuration (e.g., the number of pictures taken, current mode setting)
• Uploading of images and thumbnail images
• Control of camera functions (e.g., taking a picture or resetting the image counter).
Both single-threaded and multi-threaded programming models are supported and the camera may be accessed using either
synchronous (i.e., blocking) or asynchronous (i.e., non-blocking or overlapped) communications. Where asynchronous
communications are used, the application developer is responsible for coordinating tasks and access to the camera.
User Application
API
Drivers
Camera Module
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6. Customisation options
The feature set of the STV0680A chipset encompasses the vast majority of digital stills and toy camera applications. However,
subject to commerc ial a greem ent for high volum e app licat ions, the c onfigu ration of S TV0680A could be m odifie d by ST to a llow a
new chipset to be produced.
Please contact ST for details.
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7. Detailed chipset specifications
7.1 Typical camera specifications
The following data assumes that the camera has been built according to reference design shown in Section 9.
7.2 STV0680/STV0680A companion processor
Supply Voltage: 6-9V (when powered from battery) or 5V
(when powered from USB). (* See Note 1.)
Operating Temperature range 0oC - 40oC
Example lens horizontal FOV 44o (* See note 2)
Max. RS232 cable length supported 2m
CIF output 352 x 288 pixels
QCIF output 176 x 144 pixels
VGA output (using VV6500) 640 x 480 pixels
QVGA output (using VV6500) 320 x 240 pixels
Image upload format Raw Bayer
PC driver output format Colour RGB bitmap
Table 9 : Typical camera specifications
Notes:
1.Dual USB or battery power supply is only possible when the required power switching hardware is included, as shown in
Section 9.
2.Figures are approximate and depend on actual components sourced.
Sensor Min Max
VV6444 8.18µS39mS
VV6410 8.67µS44mS
VV6500 7.94µS66mS
Table 10 : Approximate shutter speeds
Parameter Min Typ Max Units
Supply Voltage 3.0 3.3 3.6 V
Current consumption (normal operation) 20 TBD mA
Standby current consumption (untethered standby
mode or PC suspend mode)0.35 TBD mA
Operating Temperature range 0 70 oC
Package 100QFP
Exposure control 1 000 000:1
Table 11 : STV0680/STV680A Specifications
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Table 12 : STV0680/STV0680A Absolute Maximum Ratings
Table 13 : STV0680/STV0680A DC Characteristics
Notes on Table 13:
1. VDI = |(D+) - (D-)|
2. VCM includes VDI range.
3. TFRFM =( TFR / TFF ).
4. ZDRV includes an external resistor of 20 Ohms serial to this transceiver.
Description Range Unit
Storage Temperature
(Approximate) 50 to 150 oC
Parameter Description Min Typ Max Units Note
s
VDD Power Supply 3.0 3.3 3.6 V
VILU USB differential pad D+/D- input low 0.8 V
VIHU USB differential pad D+/D- input high (driven) 2.0 V
VIHUZ USB differential pad D+/D- input high (floating) 2.7 3.6 V
VDI USB differential pad D+/D- input sensitivity 0.2 V 1
VCM USB differential pad D+/D- common mode voltage 0.8 2.5 V 2
VOLU USB differential pad D+/D- output low voltage 0.0 0.3 V
VOHU USB differential pad D+/D- output high voltage 2.8 3.6 V
VOHU USB differential pad D+/D- outp ut high vol tage 2.8 3.6 V
VCRS USB differential pad D+/D- output signal cross over voltage 1.3 2.0 V
RPU USB differential pad D+/D- pullup resistor 1.425 1.575 KΩ
RPD USB differential pad D+/D- pulldown resistor 14.25 15.75 KΩ
TFRRise Time 4 20 ns
TFFFall Time 4 20 ns
TFRFM Differential Rise Time and Fall Time Matching 90 111.11 % 3
ZDRV Driver Output Resistance 28 44 Ohms 4
Parameter Symbol Min Typ Max Unit Condition
Peak to peak jitters -- -- 170 220 ps @VCOfreq = 100MHz ~ 200MHz
Duty cycle -- 40 50 60 %
Operating voltage range VDD 3 3.3 3.6 V
Input low voltage VIL - 0.8 V VDD=3.3V
Input high voltage VIH 0.7VDD VDD V VDD=3.3V
Pull_in Time + Locking
Time Tready -- -- 0.5 ms
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Table 14 : STV0680/STV0680A PLL Characteristics
Output Slew Rate [ Tsr(Fout) -- 0.100+0.1082*CL -- ns CL:Output Load(pF)
Parameter Min Typ Max Units
Crystal specification 50/50/10/30 (12mhz Fundamental)
Cryst al frequ en cy 12.000 MHz
Frequency tolerance 50 ppm
Temperature stability 50 ppm
Operating temperature -10 Deg. C
Load capacitance 30 pF
Table 15 : STV0680/STV0680A Crystal Tolerance
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7.3 VV6444 Sensor
7.4 VV6410 and VV6500 sensors
Colour Image Format 352 x 288 pixels (CIF)
Pixel Size 12.0 x 11.0µm
Image array size 4.272mm x 3.212mm
Array F ormat CIF
Sensor signal / Noise ratio Approx. 48dB (* See note 1)
Supply Voltage 5.0V DC +/-5%
Package type 48LCC
Operating Temp. range 0oC - 40oC
Current consumption Min Typ Max Units
’Snapshot’/self-timer/continuous/tethered
video modes of operation 30 TBD mA
Standby/PC Suspend Mode, sensor pow-
ered off (see note 2) Negligible TBD µA
Standby/PC Suspend Mode, sensor pow-
ered on (See note 3) Approx.
300 TBD µA
Table 16 : VV6444 Specifications
* Notes:
1. 48dB refers to VV6404. With the addition of microlenses on VV6444, an increase in sensitivity can be expected.
2. Where the sensor is completely powered off by a FET or switcher (external hardware) during the Standby/PC Suspend
Mode.
3. Where the FET/switcher is not implemented, and the sensor is powered throughout Standby/PC Suspend Mode, however
the sensor clock is disabled.
Parameter Min. Max. Notes
VIL -0.5v 0.3 x VDD Guaranteed input low voltage
VIH 0.7 x VDD VDD + 0.5v Guaranteed input high voltage
VOL 0.4V At max IOL for pad type
VOH 2.4v VDD - 0.5 v IOH = 100µA
At max IOH for pad type
TJ Junction Temp 0 deg C 100 deg C
Internal Pullup res is tor 35kΩ 150kΩ
Internal Pulldown resistor 35kΩ150kΩ
Table 17 : VV6444 DC Characteristics
Colour Im age Format 352 x 288 pixels ( CIF)
Pixel Size 7.5 x 6.9µm
Table 18 : VV6410 Specifications
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Notes:
1. Assuming appropriate external hardware recommendations are implemented (see Section 9.), the sensor SUSPEND pin is
asserted during Stand by M ode /PC Su sp end M ode. Hence the s ens or is pl ac ed in Sen so r Su sp end mode by m ea ns of (a) a
Serial interface message and (b) the SUSPEND pin being asserted.
2. Where the external hardware does not permit the sensor SUSPEND pin to be asserted during Standby Mode/PC Suspend
Mod e, the sensor is placed in Sensor Suspend mode by means of a Serial interface m essage only. This i ncreases current
consumption due to a pull-up on the SUSPEND pin.
Notes:
1. Assuming appropriate external hardware recommendations are implemented (see Section 9.), the sensor SUSPEND pin is
Image array size 2.67mm x 2.04mm
Array Format CIF
Sensor signal / Noise ratio Approx. 57dB
Package type 36LCC
Supply Voltage 3.3V DC +/-5%
Operating Temp. range 0oC - 40oC
Current consumption: Min Typ Max Units
’Snapshot’/self-timer/continuous/tethered
video modes of operation 25 TBD mA
Standb y Mo de/PC Suspend Mode, SUS-
PEND pin asserted (see note 1) <100 TBD µA
Standb y Mo de/PC Suspend Mode, SUS-
PEND pin
not
asser ted (see note 2) <300 TBD µA
Colour Image Format 640 x 480 pixels (VGA)
Pixel Size 7.5 x 7.5µm
Image array size 4.89mm x 3.66mm
Array Format VGA
Sensor signal / Noise ratio Approx. 57dB
Supply Voltage 3.3V DC +/-5%
Package type 48LCC
Operating Te mp. range 0oC - 40oC
Current consumption: Min Typ Max Units
’Snapshot’/self-timer/continuous/tethered
video modes of operation 30 TBD mA
Standby Mode/PC Suspend Mode, SUS-
PEND pin asserted (see note 1) <100 TBD µA
Standby Mode/PC Suspend Mode, SUS-
PEND pin
not
asserted (see note 2) <300 TBD µA
Table 19 : VV6500 Specifications
Table 18 : VV6410 Specifications
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asserted during Stand by M ode /PC Su sp end M ode. Hence the s ens or is pl ac ed in Sen so r Su sp end mode by m ea ns of (a) a
Serial interface message and (b) the SUSPEND pin being asserted.
2. Where the external hardware does not permit the sensor SUSPEND pin to be asserted during Standby Mode/PC Suspend
Mod e, the sensor is placed in Sensor Suspend mode by means of a Serial interface m essage only. This increases current
consumption due to a pull-up on the SUSPEND pin.
7.5 Typical current consumption of complete camera
The following data assumes that the camera has been built according to reference design referred to in Section 9. Figures are
approximate and depend on actual components sourced - see notes.
Parameter Min. Max. Notes
VIL -0.5v 0.3 x VDD Guaranteed input low voltage
VIH 0.7 x VDD VDD + 0.5v Guaranteed input high voltage
VOL 0.4V At max IOL for pad type
VOH 2.4v VDD - 0.5v IOH = 100µA
At max IOH for pad type
TJ Junction Temp 0 deg C 100 deg C
Standard Pullup (SDA, SCL) 35µA current
draw 52µA current
draw
Standard Pulldown (OEB) 25µA current
draw 42µA current
draw
Non-st andard Pullup
(RESETB) 66µA current
draw 250µA current
draw
Table 20 : VV6410/6500 DC Characteristics
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7.5.1 Using VV6444 (sensor operates at @ 5V DC)
Notes:
1. See Table 11 on page 26.
2. From limited e v a luatio n, typi cal se lf-r efresh curre nt f igures of c ertain SDRAM chi ps are well b elo w m anu f act urers’ m axim um
specification, e.g. 100-250µA. See Section 9. for recommendations.
3. This is assuming a low quiescent current 3v3 VReg is used, and assuming that the sensor is switched off using external cir-
cuitry.
Mode Typical Current
Cons. Comments
’Snapshot’/Continuous/
Self timer mode (while
un-tethered)
80mA
’Snapshot’/Continuous/
Self timer mode (while
tethered to PC)
80mA Assuming appropriate hardware included, power is
sourced from PC while USB connected.
Camera sta ndby mode
(when NO T connected to
USB)
Approx. 0.4mA +
SDRAM self-refresh
current (see note 2)
Total current in this mode equals:
STV0680/680A Standby current consumption (see note 1)
+ SDRAM self-refresh current (see note 2)
+ peripheral circuitry ( approx. 50µA, see note 3).
Suspend mode
(when connected to
USB)
Approx. 0.6mA +
SDRAM self-refresh
current (see note 2)
Total current in this mode equals:
STV0680/680A Standby current consumption (see note 1)
+ SDRAM self-refresh current (see note 2)
+ peripheral circuitry ( approx. 50µA, see note 3).
+ 200µA , based on 1.5k pull-up in camera (see Section
9.) and 15k pull-down in PC.
Table 21 : Current consumption, complete STV0680A+VV6444 camera
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7.5.2 Using VV6410/6500 (sensor operates at @ 3.3V DC)
Notes:
1. See Table 11 on page page 26. However, STV0680A mean current consumption is to be determined by measurement of
sample quantity in due course.
2. From limited e v a luatio n, typi cal se lf-r efresh curre nt f igures of c ertain SDRAM chi ps are well b elo w m anu f act urers’ m axim um
specification, e.g. 100-250µA. See Section 9. for recomm end atio ns.
3. Sensor suspend mode cur rent <100µA when SUSPEND pin asserted, see Table 18 and Table 19.
4. If the appropriate hardw are to asse rt the sensor SUSPEND pin is not fitted, an adddi tional current co nsumptio n in this mode
of up to 200µA can be expected.
Mode Typical Comments
’Snapshot’/Continuous/
Self timer mode (while
un-tethered)
60mA Assuming appropriate hardware included, power is sourced from PC
while USB conne cted.
’Snapshot’/Continuous/
Self timer mode (while
tethered to PC)
60mA
Standby Mode (w hen
NOT connec te d to USB):
Sensor SUSPEND pin
asserted (see note 4)
Approx. 0.5mA +
SDRAM self-
refresh current (see
note 2)
Total curr ent in this m ode equals:
STV0680A Standby current consumption (see note 1)
+ SDRAM self-refresh current (see note 2)
+ peripheral cir cuit ry (approx. 50µA).
+ Sensor suspe nd mode current (See note 3)
PC Suspend mode
(when connected to
USB): Sensor SUSPEND
pin asserted (see note 4)
Approx. 0.7mA +
SDRAM self-
refresh current (see
note 2)
Total curr ent in this m ode equals:
STV0680A Standby current consumption (see note 1)
+SDRAM self-refresh current ( see note 2)
+ peripheral cir cuitry (approx. 50µA).
+ 200µA , based on 1.5k pull-up in camera (see Section 9.) and 15k
pull-dow n in PC.
+ Sensor suspe nd mode current (See note 3)
Table 22 : Current consumption, complete STV0680A+VV6410/6500 camera
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8. STV0680A Pin descriptions and Pa ckage Information
8.1 STV0680A Pin Listing
Pin no. Signal Type Description drive
Sensor Interface
69 SENSPWR Output, active high Power-up Sensor 2mA (SL)
68 SENSRST Output, active low Reset Sensor 2mA (SL)
60 SCL Input/Output (OD,T) Sensor serial interface 4mA (SL)
61 SDA Input/Output (OD,T) Sensor serial interface 4mA (SL)
62 SD3 Input (S,T) Sensor data
63 SD2 Input (S,T) Sensor data
64 SD1 Input (S,T) Sensor data
65 SD0 Input (S,T) Sensor data
66 QCLK Input (S,T) Qualification clock from sensor
67 SCLKO Out put Clock output to sensor 4mA
GPIO (see note)
77 GPIO0 (MODE) Debounced input Push button (Wake-up/Mode) 8mA (SL)
76 GPIO1
(SHUTTER)Debounced input Push button (Shutter/Confirm) 8mA (SL)
75 GPIO2 IO (OD) Not used (tie to GND with 0R link) 8mA (SL)
74 GPIO3 (50/60) Debounced input Link to select between 50Hz and 60Hz lighting 8mA (SL)
73 GPIO4 IO (OD) Not used (tie to GND with 0R link) 8mA (SL)
72 GPIO5 Output (OD) LED indicator 8mA (SL)
71 GPIO6 IO (OD) Not used (tie to GND with 0R link) 8mA (SL)
70 GPIO7 IO (OD) Not used (tie to GND with 0R link) 8mA (SL)
USB Interface
42 USBDETECT Input (S) Detect Power source from USB.
(F o r ca mera with R S23 2 only, this pin shou ld be tied to GN D ) USB speci-
fication
V1.1 com-
pliant I/O
43 DATA+ Input/Output USB bus
(F or camer a with RS232 only, this pin should be conn ected to
test points to allow for USB production test (lens focussing))
44 DATA- Input/Output USB bu s.
(F or camer a with RS232 only, this pin should be conn ected to
test points to allow for USB production test (lens focussing))
RS232 Interface
58 TXD Output Serial data transmit
(For camera with USB only, this pin should be tied to RXD) 4mA (SL)
59 RXD Input (S) Serial data receive
(For camera with USB only, this pin should be tied to TXD)
STV0680A Master Clocks and Reset
48 XIN Input Quartz Crystal IN
49 XOUT Output Quartz Crystal OUT
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51 RESET Input (S) Active (LOW) STV0680A reset
System Memory (SDRAM) Interface
20 DQMU Output Data input /output mask for dram_DQ[15:8] 2mA (SL)
22 DCLK Output Clock: all SDRAM input signals are sampled on the positive
edge 4mA
24 CKE Output C lock enable: activates (HIGH) and deactivates (LOW) the
SDRAM CLK signal 2mA (SL)
28 AD11 Output SDRAM address A11 for 64M SDRAM or BA for 16M
SDRAM 2mA (SL)
31 AD9 Output SDRAM address A9 2mA (SL)
33 AD8 Output SDRAM address A8 2mA (SL)
35 AD7 Output SDRAM address A7 2mA (SL)
37 AD6 Output SDRAM address A6 2mA (SL)
39 AD5 Output SDRAM address A5 2mA (SL)
41 AD4 Output SDRAM address A4 2mA (SL)
40 AD3 Output SDRAM address A3 2mA (SL)
38 AD2 Output SDRAM address A2 2mA (SL)
36 AD1 Output SDRAM address A1 2mA (SL)
34 AD0 Output SDRAM address A0 2mA (SL)
32 AD10 Output SDRAM address A10 2mA (SL)
26 AD12 Output SD RAM add ress A12, BA0 for 64M SDRAM, un used on 16M 2mA (SL)
30 AD13 Output SD RAM add ress A13, BA1 for 64M SDRAM, un used on 16M 2mA (SL)
25 CS Output, active low Chip select: enables (registered LOW) and disables (regis-
tered HIGH) the SDRAM command decoder. 2mA (SL)
23 RAS Output, active low SDRAM row address strobe command 2mA (SL)
21 CAS Output, active low SDRAM column address strobe command 2mA (SL)
19 WE Output, active low SDRAM write enable command 2mA (SL)
18 DQML Output Data input/output mask for dram_DQ[7:0] 2mA (SL)
16 DQ7 Input/Output SDRAM Data Bus 2mA (SL)
14 DQ6 Input/Output SDRAM Data Bus 2mA (SL)
12 DQ5 Input/Output SDRAM Data Bus 2mA (SL)
10 DQ4 Input/Output SDRAM Data Bus 2mA (SL)
8 DQ3 Input/Output SDRAM Data Bus 2mA (SL)
6 DQ2 Input/Output SDRAM Data Bus 2mA (SL)
4 DQ1 Input/Output SDRAM Data Bus 2mA (SL)
100 DQ0 Input/Output SDRAM Data Bus 2mA (SL)
2 DQ15 Input/Output SDRAM Data Bus 2mA (SL)
5 DQ14 Input/Output SDRAM Data Bus 2mA (SL)
7 DQ13 Input/Output SDRAM Data Bus 2mA (SL)
Pin no. Signal Type Description drive
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9 DQ12 Input/Output SDRAM Data Bus 2mA (SL)
11 DQ11 Input/Output SDRAM Data Bus 2mA (SL)
13 DQ10 Input/Output SDRAM Data bus 2mA (SL)
15 DQ9 Input/Output SDRAM Data bus 2mA (SL)
17 DQ8 Input/Output SDRAM Data bus 2mA (SL)
LCD Interface
85 LCDCOM Output LCD Common 2mA (SL)
93 LCD1_6 Output LCD digit 1 segment G 2mA (SL)
94 LCD1_5 Output LCD digit 1 segment F 2mA (SL)
95 LCD1_4 Output LCD digit 1 segment E 2mA (SL)
96 LCD1_3 Output LCD digit 1 segment D 2mA (SL)
97 LCD1_2 Output LCD digit 1 segment C 2mA (SL)
98 LCD1_1 Output LCD digit 1 segment B 2mA (SL)
99 LCD1_0 Output LCD digit 1 segment A 2mA (SL)
86 LCD2_6 Output LCD digit 2 segment G 2mA (SL)
87 LCD2_5 Output LCD digit 2 segment F 2mA (SL)
88 LCD2_4 Output LCD digit 2segme nt E 2mA (SL)
89 LCD2_3 Output LCD digit 2segment D 2mA (SL )
90 LCD2_2 Output LCD digit 2segment C 2mA (SL )
91 LCD2_1 Output LCD digit 2 segment B 2mA (SL)
92 LCD2_0 Output LCD digit 2 segment A 2mA (SL)
Piezo Interface
84 PIEZO Output Direct connection to piezo buzzer 8mA (SL)
Battery Level Comparator Interface
80 LO_BAT Input (A) Battery level comparator input. The voltage on low_bat is
compared to the reference to determine the battery status
79 LO_BAT_REF Input (A) 1.22V battery level comparator reference input
Power and Ground
1, 27, 50,
56, 78 DVSS[1-5] Power pin Digital Ground
3, 29, 57,
83 DVDD [1-4] Power pin Dig ital Power
52 PLLGVDD Power pin PLL Guard Power
53 PLLGVSS Power pin PLL Guard Ground
54 PLLAVDD Power pin PLL Analog Power
55 PLLAVSS Power pin PLL Analog Ground
Non-user pins
45 TEST0 Input Non-user pin - connect to 3V3
46 TEST1 Input Non-user pin - connect to 3V3
Pin no. Signal Type Description drive
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Table 23 : STV0680A Pin listing
Key:
• SL - slew rate limited output
• OD - open drain output
• S - schmitt input
• A - analog input/output
• T - 5V tolerant pad (these pads do not have diode protection)
Where the I/O pad type is not explicitly defined in the above notes, assume CMOS.
Note: GPIO a r e n ot ‘g ene ral purpose’, in the sen se th at t heir functio n i s pred ete r mi ned (e. g. GPIO0 = MO DE, GPIO2 is Unuse d),
dependant on the variant number of STV0680/STV0680A, denoted by the suffix on the part number -00x.
47 TEST2 Input Non-user pin - connect to 3V3
81 DACRES Non-user pin
I(A)
See example schematic in Section 9.
DAC bias amplifier reference input
82 DACOUT Non-user pin
O (A)
See example schematic in Section 9.
8-bit DAC current source output
0-10mA (2)
Pin no. Signal Type Description drive
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8.2 STV0680A pinout diagram
Figure 5 : STV0680A pinout in 100QFP package
GPIO2
GPIO3
(
50/60
)
GPIO4
GPIO5
(
LED
)
GPIO6
GPIO7
SENSPWR
SENSRST
SCLKO
QCLK
SD0
SD1
SD2
SD3
SDA
SCL
RXD
TXD
DVDD3
DVSS4
PLLAVSS
PLLAVDD
PLLGVSS
PLLGVDD
RESET
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
STV0680A
DVSS1
DQ15
DVDD1
DQ1
DQ14
DQ2
DQ13
DQ3
DQ12
DQ4
DQ11
DQ5
DQ10
DQ6
DQ9
DQ7
DQ8
DQML
WE
DQMU
CAS
DCLK
RAS
CKE
CS
AD12
DVSS2
AD11
DVDD2
AD13
AD9
AD10
AD8
AD0
AD7
AD1
AD6
AD2
AD5
AD3
AD4
USBDETECT
DATA+
DATA-
TEST0
TEST1
TEST2
XIN
XOUT
DVSS3
100QFP
LO_BAT
LO_BAT_REF
DVSS5
GPIO0
(
MODE
)
GPIO1
(
SHUTTER
)
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
DQ0
LCD1_a
LCD1_b
LCD1_c
LCD1_d
LCD1_e
LCD1_f
LCD1_g
LCD2_a
LCD2_b
LCD2_c
LCD2_d
LCD2_e
LCD2_f
LCD2_g
LCDCOM
PIEZO
DVDD4
DACOUT
DACRES
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8.3 STV0680A Package Dimensions
Figure 6 : 100QFP Package dimensions
Note: Pin pitch is 0.65mm
For sensor pinout and package dimensions, see Section 10., Section 11., and Section 12.
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9. Schematics and e xample parts list for complete camera design
9.1 Schematics
Support schematics are shown in the following documents:
• STV0680+VV6444 Reference Design Manual
• STV0680/680A+VV6410/6500 Reference Design Manual
Both are available in the OEM section of the ST Imaging Division web site
• (ST internal access) http://www.edb.st.com/tech_support/home.htm
• (al l other acc es s) http://www.vvl.co.uk/tech_support/home.htm
An example parts list is shown in Section 9.2, however the above documents should be referred to for the most up to date
information.
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9.2 Example Parts List
The following is taken from STV0680A + VV6410/6500 Ref Design Manual Rev 0.1.
Table 24 : STV0680A + VV6410/6500: Parts list (1)
Bill of materials for DCA1+VV6410/6500 camera Rev 0.1, 23rd Dec 1999
6v battery and power supply option 2 (using external 3v3 Vreg) assumed.
Non-populated options shown with grey background.
Preliminary
Page 1
#QT
Y
REFDES DEVICE PACKAGE VALUE COST NOTES
1 1 B1 BATTERY Up to 9v with option 2
1 1 B1 BATTERY Up to 6v with option 1
2 1 C1 CAP 805 10N
3 2 C3, C4 CAP 805 100N C3, C4 option 2 only
3 22 C2,C7, CAP 805 100N
C8,C10,C11,
C12,C13,C14,
C17,C18,C20,
C21,C23,C24,
C25,C27,C28,
C29,C30,C31,
C32,C33
3 1 C37 CAP 805 100N C37 for option 1 only
4 2 C5,C6 CAP 805 22P
5 2 C15,C16 CAP 805 1U
6 2 C19,C26 CAP 805 220P
7 1 C22 CAP 805 220N
8 1 C34 ECAP T/H 10U
8 2 C35,C36 ECAP T/H 10U C35, C36 option 2 only
9 1 D1 1N4001 DO41 1N4001 Gen purpose if 4 x AA or AAA batteries
9 1 D1 Schottky DO41 Schottky Only use schottky if 3 x AA or AAA batteries
10 1 D2 DIODE SOT23 BAS116 Must be low leakage
11 2 D3,D4 DIODE SOT23 BAS16 Only for RS232
12 3 F1,F2,F3 FERRITE 805 May be required for FCC compliance
13 1 J1 USB_CON CON_USB_4 P_ TYPE_B Must be Type B for USB compliance
14 1 J2 JACK_SKT SCJ-0355- B Only for RS232
15 1 LCD1 2DIGITLC
16 1 LED1 LED 2PINTHRU Could be omitted for reduced current cons.
17 1 Q1 NPN SOT23 BC848 Q1 only required for option 2
17 2 Q2,Q3 NPN SOT23 BC848
18 1 Q4 NPN SOT23 Only for RS232
19 1 Q5 PNP SOT23 BCW61 Required for USB inrush protection
20 1 Q6 PNP SOT23 Only for RS232
20 1 Q10 PNP SOT23 Only required for option 1
21 1 Q7 SI2301DS SOT23 Only required for option 2
21 1 Q8 SI2301DS SOT23 Required for USB inrush protection
21 1 Q9 SI2301DS SOT23
22 1 R1 RES 805 220K
22 1 R4 RES 805 220K R4 only req'd for RS232 camera with USB test points
23 1 R2 RES 805 6R8 May be required for USB inrush protection
(Exact value not verified)
24 2 R9,R13 RES 805 100K
24 1 R3 RES 805 100K R3 only required for Option 2.
24 1 R5 100K R5 only req'd for RS232 camera with USB test points
24 1 R12 100K R12 required for USB inrush protection
25 3 R10,R14, R16 RES 805 1M
25 2 R6,R23 1M Only one of R6/R23 is required
26 1 R7 RES 805 470K
27 1 R8 RES 805 82K
28 1 R11 RES 805 430K Suggested value for 6v battery
28 1 R11 RES 805 510K Suggested value for 4.5v battery
Total (Page 1)
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Table 25 : STV0680A + VV6410/6500: Parts list (2)
Bill of materials for DCA1+VV6410/6500 camera Rev 0.1, 23rd Dec 1999
6v battery and power supply option 2 (using external 3v3 Vreg) assumed.
Non-populated options shown with grey background.
Preliminary
Page 2
#QT
Y
REFDES DEVICE PACKAGE VALUE COST NOTES
29 1 R56 RES 805 OR Option 1 only
29 1 R15 RES 805 OR For camera with no RS232
30 1 R17 RES 805 33R
32 2 R19,R20 RES 805 24R
33 1 R22 RES 805 120K
34 9 R24,R26,R27, RES 805 0R R24 fitting depends on flicker frequency
R37,R38,R42,
R43,R44,R51,R52 Fit R51 or R52, not both
35 8 R25,R28,R29, RES 805 10K R25 fitting depends on flicker frequency
R31,R32,R33, R31, 32, 33, 34, 35 only for RS232
R34,R35
35 1 R41 RES 805 10K R41 only required for option 2
36 1 R30 RES 805 2K2 Only for RS232
37 1 R36 RES 805 680R
38 2 R39,R40 RES 805 4K7
39 1 R50 RES 805 390R R50 only required for option 1
41 1 SW1 TOGGLE_S WI SWITCH Optional battery off switch when not in use
(would lose stored images)
42 2 SW2,SW3 PUSH_SWI TC FARNELL
_
58 Push button switches
43 1 T1 PIEZO FARNELL_9 26
44 6 TP1,TP2,TP3, TESTPOIN T TP Only required for RS232
TP4,TP5,TP6 camera with USB prodn. Test
45 1 U1 3V3REG SOT89 MC78FC33HT1 Only required for option 2
Could use TO92 instead
46 1 U2 VV6500 48LCC VGA sensor (different foortprint to VV6410)
Only require U2 or U6
47 1 U3 STV0680 100QFP Future replacement STV0680A for VfW
48 1 U4 GM72V661 64 400MIL_T
S
OP SDRAM dual footprint is possible for U4 and U5
49 1 U5 GM72V161 62 400MIL_T
S
OP Preferred SDRAM has low self refresh Idd.
e.g. (16Mbit)
L
GM72V16162ET75
Hyundai HY57V161610DTC-7
Micron MT48LC1M16A1TG S
50 1 U6 VV6410 36LCC CIF sensor (different footprint to VV6500)
Only require U2 or U6
51 1 U8 VOLTAGE SOP-23 2.7v e.g. TELCOM TC54VC2702ECB
DETECTOR threshold RICOH Rx5VLxxC SERIES
52 1 X1 XTAL HC49U 12MHZ
53 1 Lens Lens with IR filter
Total (Page 2)
Not all compatible memory chips exhibit a low enough self -re fresh cur rent to meet the target curre nt fo r
USB suspend mode (see Table 21). Two memory types have been suggested in Table 25, based on
limited
evaluation by ST, however this does not constitute a full characterisation, and no guarantees can
be made that the self-refresh current consumption will match the target for USB suspend mode in all
cases. Please consult the memory manufacturer for precise information.
! Note
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10. VV6444 Sensor Pinout and Package Dimensions
VV6444 has the same pinout and electrical characteristics as the previous generation VV6404, but microlenses are added for
increased sensitivity, and the colour filters are different.
Although the VV64444 and VV6404 are electrically identical, the STV0680 and STV0680A use the correct settings for the
VV6444 colour set. This means that a VV6404 should not be used with STV0680/680A.
STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
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10.1 VV6444 Pin Listing
Pin Name Type Description
POWER SUPPLIES
1 AVCC PWR Core analogue power and reference supplies.
48 AGND GND Core analogue ground and reference supplies.
43 DVDD PWR Core digital power.
44 DVSS/Dsub GND Core digital ground.
6 AVDD PWR Output stage power.
5 AVSS GND Output stage ground.
7 VVDD PWR Analogue output buffer power.
9 VVSS GND Analogue output buffer ground.
14 ADCVDD PWR ADC power.
10 ADCVSS GND A DC grou nd.
19 VDD1 PWR Digital padring & logic power.
30 VDD2 PWR Digital padring & logic power.
36 VDD3 PWR Digital padring & logic power.
20 VSS1 GND Digital padring & logic ground.
29 VSS2 GND Digital padring & logic ground.
37 VSS3 GND Digital padring & logic ground.
ANALOGUE SIGNALS
45 VBLOOM OA Anti -blooming pixel reset volt age
46 VBLTW OA Bitline t est white le vel referen c e
47 VBG OA Internally generated bandgap reference voltage 1.22V
2VCM/
VREF2V5 OA Common-mode input for OSA and Internally generated 2.5 V reference
voltage.
3 VRT IA Pixel reset voltage
4 VCDSH IA VCDS
11 ADCbot IA Bottom voltage reference for ADC
13 ADCtop IA Top voltage reference for ADC
13 TopRef OA Internally generally top voltage reference for ADC
Pin Name Type Description
DIGITAL CONTROL SIGNALS
12 HOLDPIX ID↓Test Pin - do not use
15 SIN ID↓Frame timing reset (soft reset).
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16 RESETB ID↑System Reset. Active Low.
SERIAL INTERFACE
42 SCL ID↑Serial bus clock (input only).
41 SDA BI↑Serial bus data (bidirectional, open drain).
DIGITAL VIDEO INTERFACE
39
38
35
34
D[3]
D[2]
D[1]
D[0]]
ODT Tris tateable 4-wire output data bus. D[3] is the mo st sig ni fic ant bit.
33 QCK ODT Tristateable data qualification clock.
40 FST ODT Not required by STV06 80A
17 OEB ID↓Digital output (tristate ) enabl e.
SYSTEM CLOCKS
31 CLKI ID Oscilla tor inp ut.
32 CLKO OD Oscillator output.
Do not connect
18
21-28 DNC Do not connect
Key
A Analogue Input D Digital Input
OA Analogue Output ID↑Digital input with internal pull-up
BI Bidirectional ID↓Digital input with internal pull-down
BI↑Bidirectional with internal pull-up OD Digital Output
BI↓Bidirectional with internal pull-down ODT Tristateable Digital Output
Pin Name Type Description
STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
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10.2 VV6444 Pinout Diagram
Notes:
1. NC - Not connected
2. (*) - Paddle connections
CLKI
CLKO
D[0]
D[1]
VDD3
VSS3
DVSS/Dsub
VBLTW
VBG
VCDS
AVCC
AGND (*)
VVSS
ADCVSS (*)
ADCVDD
VDD1
VSS1
SIN
7
8
6
543214847464544
42
41
38
9
10
11
12
13
14
15
16
17
1920212223242526272829
32
33
34
35
36
37
D[2]
D[3]
FST
SDA
SCL
48 pin LCC
VCM / VREF2V5
AVSS
VBLOOM
ADCBot
40
39
18
30
31
43
NC
AVDD
QCK
VVDD
OEB
RESETB
TopRef/ADCTop
HOLDPIX
VRT
VSS2
VDD2
NC
DVDD
NC
NC
NC
NC
NC
NC
NC
NC
VV6444
Figure 7 : VV6444 Pinout
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10.3 VV6444 Package Dimensions
Figure 8 : VV6444 package dimensions in 48LCC (1)
Notes.
1. Die is optically centred.
2. Refractive index of glass is ~1.52.
3. Distance to optical surface of Die.
4. Pixel area of sensor.
4
4
11.176 ±0.13
1.016 ±0.08
14.52
14.09
4.27
3.21
Pin 1 Pin 6
A
A
STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
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Figure 9 : VV6444 package dimensions in 48LCC (2)
3
2.27
1.85
1.12
0.90
0.60
0.50
A-A (6 : 1)
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11. VV6410 Pinout information and package dimensions
Note that early VV6410 samples (as can be seen on some STV0680A EVK’s) are 48LCC, however the sampling and production
package is 36LCC.
11.1 VV6410 pinout
Figure 10 : 36 pin CLCC package pin assignment
RESETB
D[0]
LST/D[5]
FST/D[6]
VDDcore/
Vbus
VBG
VRT
AoutP
VDDhi
OEB
CLKI
7
8
6
54
3
2
1
9
10
11
12
13
14
15
16
17
19
20
21
22
23
24
25
26
27
28
29
32 33 34 35 36
D[3]
D[4]
Aud3V3
AoutN
Vbase
AVSS
18
30
31 Vbltw
D[1]
Vid3V3
AIN
VSScore
VSSio
SRAMVSS
D[2]
QCK
SDA
SUSPEND
VDDio
D[7]
Vbloom
Reg3V3
SCL
PORB
VV6410
36LCC
NC
NC
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11.2 VV6410 Pin descriptions
Name Pin Number Type Description
POWER SUPPLIES
AVSS 10 GND Core analog ground and reference supplies.
SRAMVSS 17 GND In-column SRAM analog ground.
VDDcore/
Reg3V3 34 PWR Digital logic power.
VDDio 33 PWR Digital pad ring power.
VSScore 22 GND Digital logic ground.
VSSio 23 GND Digital pad ring ground.
ANALOG SIGNALS
Vbloom 8 OA Anti-blooming pixel reset voltage
VBLTW 7 OA Bitline test white level reference
VBG 1 OA Internally generated bandgap reference voltage 1.22V
VRT 2 IA Pixel reset voltage
AIN 4 IA Analog input to Audio Amplifier
AOutP 5 OA Analog output of Audio Amplifier (positive)
AOutN 6 OA Analog output of Audio Amplifier (negative)
VDDHI 9 IA Incoming power supply 4 -> 6V
VBase 35 OA Drive for base of external bipolar
Vbus 36 IA Incoming power supply 3.3 -> 6V
Aud3V3 3 OA On-chip Audio Amplifier Voltage Regulator Output
Vid3V3 11 O A On-chip Video Supply Voltage Regulator Output
PORB 13 OD Power-on Reset (Bar) Output.
DIGITAL VIDEO INTERFACE
D[4]
D[3]
D[2]
D[1]
D[0]
27
26
25
24
20
ODT Tri-stateable 5-wire output data bus.
- D[4] is the most sig nif ic ant bit .
- D[4:0] have programmable drive strengths 2, 4 and 6 mA
QCK 32 ODT Tri-stateable data qualification clock.
LST/D[5] 28 ODT Tri-stateable Line start output
May be configured as tri-stateable output data bit 5 D[5].
FST/D[6] 29 ODT Tri-stateable Frame start signal.
May be configured as tri-stateable output data bit 6 D[6].
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D[7] 31 ODT Tri-stateable Data wire (ms data bit).
May be configured as tri-stateable output data bit 6 D[6].
OEB 16 ID↓Digital output (tri-state) enable.
DIGITAL CONTROL SIGNALS
RESETB 21 ID↑System Reset. Active Low.
May be configured as System Sync. Active Low.
SUSPEND 12 ID↑USB Suspend Mode Control signal. Active High
If this fe ature i s not re quired t hen the suppo rt circuit m ust p ull the pin to
ground. The combination of an active high signal and pull up pad was
chosen to limit current d rawn by the device while in suspend mode.
SERIAL INTERFACE
SCL 15 BI↑Serial bus clock (input only).
SDA 14 BI↑Serial bus data (bidi rectional, open drai n).
SYSTEM CLOCKS
CLKI 30 ID↓Schmitt Buffered Clock input or LVDS positive Clock input
Not connected
NC 18, 19 Not connected
Key
A Analog Input D Digital Input
OA Analog Output ID↑Digital input with internal pull-up
BI Bidirectional ID↓Digital input with internal pull-down
BI↑Bidirectional with internal pull-up OD Digital Output
BI↓Bidirectional with int erna l pull-down ODT Tri-state ab le Di git al Ou tpu t
Name Pin Number Type Description
STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
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11.3 VV6410 package Details (36pin CLCC)
10.67-0.13+0.30
2.67
2.02
8.13 ±0.13
1.02 ±0.13
40 Places
R
0.15
Pin 1
Pin 5
Pin 6
A
A
1.09 ±0.15(note 3)
2.15-0.26+0.16
0.60-0.10
0.00
1.55 ±0.16
A-A (8 : 1)
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12. VV6500 Pinout and pin descriptions (48pin LCC package)
12.1 Pinout
Fi
g
ure 11 : 48
p
in LCC
p
acka
g
e
p
in assi
g
nment
RESET
D
[
1
]
D
[
2
]
D
[
3
]
D
[
4
]
VDDCORE
VBASE
VBUS
VBG
VBLOOM
VDDHI
VCMTCAS
NC
OE
SUSPEND
7
8
6
543214847464544
42
41
38
9
10
11
12
13
14
15
16
17
1920212223242526272829
32
33
34
35
36
37
LST/D
[
5
]
FST/D
[
6
]
CLKI/CLKIP
D
[
7
]
QCK
AUD3V3
AOUTP
REG3V3
40
39
18
30
31
43
VBLTW
D
[
0
]
AOUTN
SDA
POR
VID3V3
AVSS
AIN
VSSCORE
VSSIO
SCL
VDDIO
NC
NC
NC
NC
NC
NC
NC
SRAMVSS
VRT
NC
NC
CLKIN
NC
VV6500
48LCC
STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
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12.2 VV6500 pin descriptions
Name Pin Number T
y
pe Description
POWER SUPPLIES
AVSS 11 GND Core analog ground and reference supplies.
SRAMVSS 21 GND In-column SRAM analog ground .
VDDcore 44 PWR Digital logic power.
VDDio 43 PWR Digital pad ring power.
VSScore 29 GND Digital logic ground.
VSSio 30 GND Digital pad ring ground.
SRAMVSS 21 GND In-column SRAM analog ue grou nd.
ANALOG SIGNALS
Vbloom 8 OA Anti-blooming pixel reset voltage
VBLTW 7 OA Bitline test white level reference
VBG 1 OA Internally generated bandgap reference voltage 1.22V
VCMTCAS 13 IA Common-mode input for column pre-amp.
VRT 2 IA Pixel reset voltage
AIN 4 IA Analog input to Audio Amplifier
AOutP 5 OA Analog output of Audio Amplifier (positive)
AOutN 6 OA Analog output of Audio Amplifier (negative)
VDDHI 9 IA Incoming power supply 4 -> 6V
VBase 46 OA Drive for base of external bipolar
Vbus 47 IA Incoming power supply 3.3 -> 6V
Reg3V3 45 OA On-chip Voltage Regulator Output
ARef IA On-chip Audio Amplifier Reference Input
Aud3V3 3 OA On-chip Audio Amplifier Voltage Regulator Output
Vid3V3 12 OA On-chip Video Supply Voltage Regulator Output
PORB 16 OA Power-on Reset (Bar) Output.
DIGITAL VI DEO INTERFACE
D[4]
D[3]
D[2]
D[1]
D[0]
36
35
34
33
32
ODT Tri-stateable 5-wire output data bus.
- D[4] is the most sig nif ic ant bit .
- D[4:0] have programmable drive strengths 2, 4 and 6 mA
QCK 42 O DT Tri-stateable data qualification clock.
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CLKIN 40 BI↑LVDS negative Clock input
LST/D[5] 37 ODT Tri-stateable Line start output
May be configured as tri-stateable output data bit 5 D[5].
FST/D[6] 38 ODT Tri-stateable Frame start signal.
May be configured as tri-stateable output data bit 6 D[6].
D[7] 41 ODT Tri-stateable Data wire (ms data bit).
May be configured as tri-stateable output data bit 6 D[6].
OEB 20 ID↓Digital output (tri-state) enable.
DIGITAL CONTROL SIGNALS
RESETB 31 ID↑System Reset. Active Low.
May be configured as System Sync. Active Low.
SUSPEND 31 ID↑USB Suspend Mode Control signal. Active High
If this fe ature i s not re quired t hen the suppo rt circuit m ust p ull the pin to
ground. The combination of an active high signal and pull up pad was
chosen to limit current d rawn by the device while in suspend mode.
SERIAL INTERFACE
SCL 18 BI↑Serial bus clock (input only).
SDA 17 BI↑Serial bus data (bidirect ion al, open drain).
SYSTEM CLOCKS
CLKI/CLKIP 39 ID↓Schmitt Buffered Clock input or LVDS positive Clock input
Not connected
NC 10, 14, 19, 22-
28, 48 Not connected
Ke
y
A Analog Input D Digital Input
OA Analog Output ID↑Digital input with internal pull-up
BI Bidirectional ID↓Digital input with internal pull-down
BI↑Bidirectional with internal pull-up OD Digital Output
BI↓Bidirectional with int erna l pull-down ODT Tri-state ab le Di git al Ou tpu t
Name Pin Number T
y
pe Description
STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
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12.3 VV6500 package Details (48 pin LCC)
Notes.
1. Die is optically centred.
2. Refractive index of glass is ~1.52.
3. Distance to optical surface of Die.
4. Pixel area of sensor.
14.52
14.09
11.176 ±0.130
1.016 ±0.080
2.02
(note 4)
2.67 (note 4)
Pin 1
Pin 6
A
A
2.27
1.85
3
1.120
0.896
0.60
0.50
A-A (6 : 1)
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STV0680F_backpages.fm
13. Evaluation kit
STMicroelectronics recommends using the Evaluation Kit (e.g. STV-DCA/CIF-E01) for initial evaluation and design-in. The STV-
DCA includes a reference design board (STV-DCA/CIF-R01) camera modu le, containing a STMicroelectro nic s CMO S sens or +
STV0680A chipset, memory, lens, connectors, LCD, battery holder, push buttons/switches, and other componentry as detailed.
The push buttons are arranged for ease of operation as a real ‘camera’. Optional PCB links enable alternate functionality, and
demonstration software is included, as detailed in Section 5. allows for picture download, video, and AVI movie clips
An evaluation kit is not available for STV0680+VV6444. Several small form factor demonstration units
(PCB0194) have been built, however, these are not identical to the camera described in this reference
design.
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STV0680F_backpages.f
14.Ordering details
* Note: The variant number of STV0680A is indicated by the suffix -001, 002, 003, etc. Contact STMicroelectronics for latest
information.
Technical support
This document and other related technical support information, such as datasheets, software downloads,etc for
STMicroelectronics Imaging Division Products can be found at http://www.vvl.co.uk/tech_support/home.htm
Note: All the above web addresses when accessing from within ST should read www.edb.st.com rather than www.vvl.co.uk
Description Part number
STV0680 companion processor (no VfW or RS232 support) STV0680-001
STV0680A companion processor (including VfW and RS232 support) STV0680A-002*
VV6444+STV0680/STV680A designs
LCC packaged CIF Image Sensor (5v) VV6444C001
STV0680/STV0680A + VV6444 Digital Camera Chipset, Reference
Design ManualAvailable for download from
http://www.vvl.co.uk/tech_support/
home.htm
VV6410/6500+STV0680A designs
36pin CLCC packaged, microlensed CIF ColourMOS sensor VV6410C036
48pin CLCC packaged, microlensed VGA ColourMOS sensor VV6500C001
Digital camera Evaluation Kit for STV0680/STV0680A+VV6410 STV-DCA/CIF-E01
Digital camera Evaluation Kit for STV0680/STV0680A+VV6500 STV-DCA/VGA-E01
STV0680/STV0680A + VV6410/6500 Digital Camera Chipset, Reference
Design ManualAvailable for download from
http://www.vvl.co.uk/tech_support/
home.htm
Table 26 : Ordering details
STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000
CDSTV0680F-C
60
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics
The ST logo is a registered trademark of STMicroelectronics
© 2000 STMicroelectronics - All Rights Reserved
.
STMicroelectronics, Imaging Division
®
www.vvl.co.uk
www.st.com
asiapacific_sales@vvl.co.uk
central_europe_sales@vvl.co.uk
france_sales@vvl.co.uk
japan_sales@vvl.co.uk
nordic_sales@vvl.co.uk
southern_europe_sales@vvl.co.uk
uk_eire_sales@vvl.co.uk
usa_sales@vvl.co.uk
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