VV6444C001 [STMICROELECTRONICS]
Low Cost Digital Camera (LCDC) Chipset; 低价数码相机（ LCDC ）芯片组
| 型号： | VV6444C001 |
| 厂家： | 
ST |
| 描述： | Low Cost Digital Camera (LCDC) Chipset |
| 文件： | 总60页 (文件大小：344K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
STV0680A + VV6444/6410/6500
®
Low Cost Digital Camera (LCDC) Chipset
PRELIMINARY
DESCRIPTION
KEY FEATURES
•
CIF (352 x 288) or VGA (640 x 480) resolution sensor
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
develop chipsets for modular systems which will provide the
core of a highly cost-competitive new standard in consumer
digital stills cameras (DSC).
•
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/RS232 interface options
Evaluation kit available
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.
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
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).
•
•
‘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
Incorporating a wide range of features, the STV0680A
chipset offers exceptional performance at a very competitive
price point. ST’s aim is to enable manufacturers to offer fully
functional DSC products to the end consumer for between
$50 and $100. An evaluation kit (EVK) and reference design
manual are available, as well as standard TWAIN and Video
for Windows drivers. Alternatively, a software development
kit (SDK) allows access to ST colour processing algorithms
under licence, to develop OEM software.
•
•
•
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
The chipset incorporates ST’s high performance VV6444/
6410 CIF (352 x 288 pixel) or VV6500 VGA (640 x 480 pixel)
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.
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 agreement with ST.
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).
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.
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.
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
.
Commercial in Confidence
1
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.
PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
STV0680A + VV6444/6410/6500
March 2000
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
2
CDSTV0680F-C
CDSTV0680F-CTOC.fm
Commercial in confidence
PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
STV0680A + VV6444/6410/6500
March 2000
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
3
CDSTV0680F-C
CDSTV0680F-CTOC.fm
Commercial in confidence
PRELIMINARY
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
STV0680A + VV6444/6410/6500
March 2000
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 following changes 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 operating 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.
Section 3.: 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.
•
•
•
•
•
Changed IR filter recommendation, see section Section 2.1.1.
Added approximate shutter speeds, in Table 10.
Adjusted sensor image array sizes in Section 7. to the correct sizes.
Updated ordering information in Section 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, the camera stores raw image data in memory. The camera carries out no colour processing, ensuring its simplicity
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 option is provided, when tethered through USB, which can allow for Video for Windows applications, and ‘video clips’ can
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.
Optional
2 x 7 seg. LCD
Optional
LED Indicator
Push buttons:
Mode
Shutter
Low cost lens
16MBit or 64MBit
SDRAM
LCD
Driver
m emory
I/F
GPIO
Sensor data
RS232 interface
to PC
CMOS Sensor:
VV6444/6410
RS232
I/F
Sensor
I/F
Transceiver
Circuit
Sensor clock
STV0680A
Optional
Piezo
Buzzer
USB
I/F
VV6500
PW M
Power
USB interface
to PC
Detect Low
Battery
M anagement
M ini
Audio I/F
Circuit
speaker
Buffer Amp
6-9V Battery e.g., PP3,
4-6 x AA, AAA, etc
12M Hz XTAL
3v3 supply (STV0680A)
Switched sensor supply (5V for VV6444, 3v3 for VV6410/6500)
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.:
Video for
Windows
support
Co-
processor
Sensors
supported
SDRAM
supported
USB
interface
RS232
interface
STV0680-001
VV6444
16Mbit only
Yes
Yes
No
No
STV0680A-002 VV6444/6410/6500
16Mbit or 64Mbit
Yes
Yes
Table 1 : Product choices
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1.3 Sensor choices
The following sensors are supported:
Sensor supply
Sensor
Resolution
voltage
VV6444
VV6410
VV6500
CIF (352 x 288)
5v
3.3v
VGA (640 x 480)
Table 2 : Sensor choices with STV0680/STV0680A
1.4 Key system features
The key features of a typical camera based on the 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 number 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-tethered ‘Continuous’ mode allows capture of image sequences for storage in memory and subsequent download to PC.
Piezo buzzer indicates a number of useful events to the user, e.g. whether enough light is present for picture capture, etc.
Indicator LED.
1.4.4 User features on PC software
PC software allows a number of features, including fast download of thumbnail images for picture selection, 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
Video for Windows driver for tethered video mode (through USB), available at all resolutions, with fastest framerates at QCIF
resolution
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•
AVI video file creation from image sequences captured in ‘continuous’ mode
Interface type:
RS232
USB
PC Operating system:
Win9x, WinNT4, Win2k
Win98 and Win2k only
STV680-001
Not available
TWAIN
TWAIN
STV0680A-002
TWAIN, VfW
Table 3 : Driver choices
Custom OEM software can be developed by using the SDK (for SDK availability, contact ST), to upload thumbnails/still images 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 battery detection
Dependant on hardware configuration, switch-over to USB power supply is supported, to allow the device to operate with low
batteries or without batteries, when connected to USB.
•
Full USB compliance requirements are listed in the USB specification, however, in a camera designed using this chipset, 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 Section 9. for further 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.
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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 stills photography, ‘High’ or ‘Low’ resolution mode can be selected, to give CIF or QCIF pictures from a CIF sensor, and 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..
Max. no. of
images
stored in
16MBit
Max. no. of
images
stored in
64MBit
Approximate
VfW framerate
(*)
Sensor
Image Size
Resolution
mode
Sensor
Final Image Size
memory
memory
VV6444/
6410
CIF 352 x 288
VGA 640 x 480
High
Low
CIF 352 x 288
20
80
80
9 frames/sec
25 frames/sec
QCIF 176 x 144
(Subsampled)
320
(see notes)
VV6500
High
Low
VGA 640 x 480
(6)
26
2 frames/sec
12 frames/sec
QVGA 320 x 240
(Subsampled)
(24)
106
Table 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 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.
Max. no. of
Sensor
Image
Size
images
stored in
16MBit
Resolution
mode
Sensor
Final Image Size
memory
VV6444
CIF 352 x
288
High
Low
CIF 352 x 288
20
80
QCIF 176 x 144
(Subsampled)
Table 5 : Image modes supported (
)
STV0680-001
2.1.1 VV6444
VV6444 is a CIF resolution, 5V CMOS imaging sensor. A brief specification is shown in Section 7. VV6444 has the same
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
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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 interface
The user interface supported by STV0680A comprises of user controls, audible signals and visual displays.
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
2.2.1 Push buttons
The following are typical of the type of functions which are supported by the chipset. These functions are achievable with no more
than 2 push buttons.
1. Mode button (Wake-up/Switch between modes): This button allows the user (1.1) to wake the camera up from standby 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. Camera has been ‘Woken up’ from standby mode (either by the user pressing a button, by re-connecting the power source,
or by connecting a USB/RS232 connection).
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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 has NOT been taken after the user presses the capture button, due to picture counter having reached the maximum
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 chosen threshold level is determined by a resistor value, as shown in Section 9. Where no USB has been detected, 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 requirement of certain USB compliance tests that such additional hardware is included 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 end-user software developed by OEM using SDK (for SDK availability, contact ST). The SDK is supplied by ST as a
32-bit DLL format, running on Windows 98, and accessed through a documented software interface. This provides the basis
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 available 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 picture is selected for download, full image download takes approximately 10 seconds per image for a CIF image (around
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 pressed in ‘Snapshot’ mode, the chipset captures an image if the exposure and gain value has reached a suitable value 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
If mode button
pressed while in this
mode
If shutter button pressed while in
If no further
action
LCD
displays
Mode
this mode
Standby
mode
No function - pictures cannot be taken in
standby mode
Wakes up camera into
‘Snapshot’ mode
Remains in
standby mode
(Display 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 ‘Snap-
shot’ mode for
30 seconds then
moves to
Number of pic-
tures still avail-
able to take
standby mode
Continu-
ous cap-
ture
Takes a picture every 80mS while button
pressed, regardless of light available, 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 second count-
down, if sufficient light available, then
returns to ‘Snapshot’ mode
Moves to ‘Clear camera’
mode
“St”
’Clear
camera’
(1st press:)
Prompts user to
clear camera
Moves to ‘Change resolu-
tion’ mode (see note)
“CL”
(2nd press:) Clears all
images stored in cam-
, then returns to
era
‘Snapshot’ mode
’Change
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”
Changes resolution
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.
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 camera enters standby mode automatically after 30 seconds of inactivity if not tethered to USB, or when USB suspend mode
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)
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2.
(only if no USB detected
)
RS232 receives start bit from host software
3. USB connection detected
4. If in USB suspend mode, USB driver re-starts communications 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 continuous image data is stored in memory and can then be downloaded to the PC. Once the memory is full, the user
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 displays “St”. Auto-exposure and gain are continuously enabled. When the shutter button is pressed, the 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 displays the target resolution to which the camera can be changed, i.e. if in High resolution “Lr” (Low resolution) 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).
Dependant on the type of sensor used, different resolutions are obtained, see Table 4 or Table 5. By pressing the shutter 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 activated by the PC Video for Windows driver while the camera is tethered, dependant on whether 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 battery voltage falls extremely low. Ways of avoiding this situation are discussed in the reference design, see Section 9.
Note: normally a camera with USB interface should source power from the USB connection, but this is hardware dependant, 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 camera is powered on again, either when the battery is re-fitted, or the USB is re-connected, or the PC is re-started, 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
STV0680A 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 case the chipset can be regarded as a functional ‘black box’, and no further details regarding the STV0680A-sensor
interface are required.
4.3 Memory interface
STV0680A is designed to interface to an external 16Mbit or 64Mbit SDRAM (see Table 4 and Table 5). The SDRAM device must
have a 16 bit wide data bus and operate from a 3.3V supply. Two sizes of SDRAM memory are supported by STV0680A, 16MBits
(1M x 16 bits wide) or 64MBits (4M x 16 bits wide), the memory size is auto-detected by STV0680A. STV0680A clocks the
SDRAM at 6MHz, typically this is well below the figures offered by most manufacturers’ devices. Devices which are PC66 and/or
PC100 compliant are preferred. For interface wiring, see Section 9.
4.3.1 SDRAM Current consumption
For maximum system battery life while no pictures are being taken, and to assist in meeting requirements for USB compliance, 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.
tCK
tL
tH
DCLK
CKE
tCMS
tCMH
READ
Command
A0-9,BA
ACTIVE
NOP
PRECHARGE
NOP
ROW
ROW
COLUMN
A10
tAS
tAH
tCMS
tCMH
tO H
tAC
DQM
DQ
DOUT M
DOUT M + 1
DOUT M + 2
DOUT M + 3
tRC D
READ Latency
tRC
tRAS
tRP
DQ sam ple
DQ sam ple
DQ sam ple
DQ sam ple
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Figure 2 : SDRAM Read Timing (16Mbit device, burst read)
tCK
tL
tH
DCLK
CKE
tCMS
tCMH
WRITE
Command
A0-9,BA
ACTIVE
NOP
PRECHARGE
NOP
ROW
COLUMN
A10
ROW
tAS
tAH
tCMS
tCMH
tDH
tDS
DQM
DQ
DIN M
DIN M + 1
DIN M + 2
DIN M + 3
tR CD
tRC
tRAS
tRP
Figure 3 : SDRAM Write Timing (16Mbit device, burst write)
Symbol
tCK
Min
Max
Units
ns
Symbol
tDS
Min
Max
Units
166.45 166.89
81.01
ns
ns
tCH
½
½
tCK
tCK
tCK
ns
tDH
83.41
tCL
tRCD
tRAS
tRC
1
tCK
tCK
tCK
tCK
tCK
ns
tAC
½
5
5
tOH
0
7
2
tCMS
tCMH
tAS
82.88
82.85
82.88
ns
tRP
ns
tRCD
tAH
1
ns
82.76
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
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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
connection from STV0680A to a USB connector with minimal additional hardware (i.e. a small number of passive discretes) - 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 device state handling.
Clock and data recovery from USB.
Bit stripping and bit stuffing functions.
CRC5 checking, CRC16 generation 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 proceed.
Transmitting 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 used to regulate the supply for all three components from the battery, or the sensor on-board VReg can be used. 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
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
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 battery in the camera. This means that power sourcing from USB is required, which also saves on
battery life while the camera is used in USB tethered video mode. In order to allow switching from battery to USB power, some
additional hardware is required (see also Section 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 inrush protection circuit can protect the USB bus from current draw in the case of a low battery/battery not fitted. This 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 crystal. For specification requirements, see Table 15. STV0680A includes an on-chip low jitter PLL, for 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 frequency is 34.7Hz
4.8.2 LCD interface pinout
'0' connects to segment 'a', '1' connects to segment 'b', and so on, where a to g are standard for all 7-segment displays, as well as
an LCD common output, giving
fifteen signals in total.
4.9 Switches and LED’s
The GPIO lines on STV0680A have pre-defined functions as follows, see Section 2.2 for user interface functionality, and Section
9. for precise hardware implementation.
The precise functionality of early demonstration units may vary from the actual user interface supported
by STV0680A.
! Note
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.).
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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 available
Interface type:
RS232
USB
PC Operating system:
Win9x, WinNT4, Win2k
Win98 and Win2k only
STV680-001
Not available
TWAIN
TWAIN
STV0680A-002
TWAIN, VfW
Table 8 : Driver choices
5.2 Demonstration software
The following is supplied with evaluation kits/demonstration units (This software is mainly for demonstration purposes and should
NOT be supplied as an end-user product.):
1. Simple demonstration software for uploading thumbnails and images.
2. Video demonstration application for STV0680-001 tethered “video” mode through USB (WIN 98 only) (NOT VfW compati-
ble). This is not required for STV0680A, which can be used with standard VfW drivers.
3. AVI creator software for uploading continuous images for creating ‘movie’ clips.
With STV0680, a simple video.exe application is provided. Whilst not being a VfW application, it gives
sufficient framerate to allow for camera test, lens focussing, etc.
! Note
5.3 OEM software
OEM’s have the following options for productisation of a camera based on the chipset:
1. TWAIN driver for uploading images, this would allow the camera to be bundled with standard TWAIN compatible imaging
software.
2. Video for Windows driver for tethered video mode through USB (WIN 98 & WIN2K only). This would allow the camera to be
bundled with standard video for windows software.
3. Development of custom end-user software, including the ST colour process, developed under license using 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/Win2K. The serial communications link is also supported for Windows 95.
A development environment of Microsoft Visual C++ v5 or higher is assumed.
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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.
User Application
API
Drivers
Camera Module
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.
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6. Customisation options
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
The feature set of the STV0680A chipset encompasses the vast majority of digital stills and toy camera applications. However,
subject to commercial agreement for high volume applications, the configuration of STV0680A could be modified by ST to allow 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.
Supply Voltage:
6-9V (when powered from battery) or 5V
(when powered from USB). (* See Note 1.)
Operating Temperature range
Example lens horizontal FOV
Max. RS232 cable length supported
CIF output
0oC - 40oC
44o (* See note 2)
2m
352 x 288 pixels
176 x 144 pixels
640 x 480 pixels
320 x 240 pixels
Raw Bayer
QCIF output
VGA output (using VV6500)
QVGA output (using VV6500)
Image upload format
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
VV6410
VV6500
8.18µS
8.67µS
7.94µS
39mS
44mS
66mS
Table 10 : Approximate shutter speeds
7.2 STV0680/STV0680A companion processor
Parameter
Supply Voltage
Min
3.0
Typ
3.3
Max
3.6
Units
V
Current consumption (normal operation)
20
TBD
TBD
mA
mA
Standby current consumption (untethered standby
mode or PC suspend mode)
0.35
Operating Temperature range
Package
0
70
oC
100QFP
1 000 000:1
Exposure control
Table 11 : STV0680/STV680A Specifications
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Description
Range
Unit
Storage Temperature
(Approximate)
50 to 150
oC
Table 12 : STV0680/STV0680A Absolute Maximum Ratings
Note
s
Parameter
Description
Min
Typ Max Units
VDD
VILU
Power Supply
USB differential pad D+/D- input low
USB differential pad D+/D- input high (driven)
USB differential pad D+/D- input high (floating)
USB differential pad D+/D- input sensitivity
USB differential pad D+/D- common mode voltage
USB differential pad D+/D- output low voltage
USB differential pad D+/D- output high voltage
USB differential pad D+/D- output high voltage
USB differential pad D+/D- output signal cross over voltage
USB differential pad D+/D- pullup resistor
USB differential pad D+/D- pulldown resistor
Rise Time
3.0
3.3
3.6
0.8
V
V
VIHU
VIHUZ
VDI
2.0
2.7
0.2
0.8
0.0
2.8
2.8
1.3
1.425
14.25
4
V
3.6
V
V
1
2
VCM
2.5
0.3
V
VOLU
VOHU
VOHU
VCRS
RPU
V
3.6
V
3.6
V
2.0
V
1.575
15.75
20
KΩ
KΩ
ns
ns
%
RPD
TFR
TFF
Fall Time
4
20
TFRFM
ZDRV
Differential Rise Time and Fall Time Matching
Driver Output Resistance
90
111.11
44
3
28
Ohms
4
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.
Parameter
Symbol
Min
Typ
Max Unit
Condition
Peak to peak jitters
Duty cycle
--
--
--
170
50
220
60
ps
%
V
@VCOfreq = 100MHz ~ 200MHz
40
Operating voltage range
Input low voltage
Input high voltage
VDD
VIL
3
3.3
3.6
-
0.7VDD
--
0.8
V
VDD=3.3V
VDD=3.3V
VIH
Tready
VDD
0.5
V
Pull_in Time + Locking
Time
--
ms
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Output Slew Rate [
Tsr(Fout)
--
0.100+0.1082*CL
--
ns
CL:Output Load(pF)
Table 14 : STV0680/STV0680A PLL Characteristics
Parameter
Min
Typ
Max
Units
Crystal specification
Crystal frequency
50/50/10/30 (12mhz Fundamental)
12.000
MHz
ppm
Frequency tolerance
Temperature stability
Operating temperature
Load capacitance
50
50
ppm
-10
Deg. C
pF
30
Table 15 : STV0680/STV0680A Crystal Tolerance
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7.3 VV6444 Sensor
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
Colour Image Format
352 x 288 pixels (CIF)
12.0 x 11.0µm
4.272mm x 3.212mm
CIF
Pixel Size
Image array size
Array Format
Sensor signal / Noise ratio
Supply Voltage
Approx. 48dB (* See note 1)
5.0V DC +/-5%
48LCC
Package type
Operating Temp. range
Current consumption
0oC - 40oC
Min
Typ
30
Max
TBD
Units
mA
’Snapshot’/self-timer/continuous/tethered
video modes of operation
Standby/PC Suspend Mode, sensor pow-
ered off (see note 2)
Negligible
TBD
TBD
µA
µA
Standby/PC Suspend Mode, sensor pow-
ered on (See note 3)
Approx.
300
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
VIH
-0.5v
0.3 x VDD
VDD + 0.5v
0.4V
Guaranteed input low voltage
Guaranteed input high voltage
At max IOL for pad type
0.7 x VDD
VOL
VOH
2.4v
VDD - 0.5v
IOH = 100µA
At max IOH for pad type
TJ Junction Temp
Internal Pullup resistor
Internal Pulldown resistor
0 deg C
35kΩ
100 deg C
150kΩ
35kΩ
150kΩ
Table 17 : VV6444 DC Characteristics
7.4 VV6410 and VV6500 sensors
Colour Image Format
Pixel Size
352 x 288 pixels (CIF)
7.5 x 6.9µm
Table 18 : VV6410 Specifications
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Image array size
Array Format
2.67mm x 2.04mm
CIF
Sensor signal / Noise ratio
Package type
Approx. 57dB
36LCC
Supply Voltage
3.3V DC +/-5%
0oC - 40oC
Operating Temp. range
Current consumption:
Min
Typ
Max
TBD
Units
mA
’Snapshot’/self-timer/continuous/tethered
video modes of operation
25
Standby Mode/PC Suspend Mode, SUS-
PEND pin asserted (see note 1)
<100
<300
TBD
TBD
µA
µA
Standby Mode/PC Suspend Mode, SUS-
PEND pin not asserted (see note 2)
Table 18 : VV6410 Specifications
Notes:
1. Assuming appropriate external hardware recommendations are implemented (see Section 9.), the sensor SUSPEND pin is
asserted during Standby Mode/PC Suspend Mode. Hence the sensor is placed in Sensor Suspend mode by means 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
Mode, the sensor is placed in Sensor Suspend mode by means of a Serial interface message only. This increases current
consumption due to a pull-up on the SUSPEND pin.
Colour Image Format
Pixel Size
640 x 480 pixels (VGA)
7.5 x 7.5µm
Image array size
Array Format
4.89mm x 3.66mm
VGA
Sensor signal / Noise ratio
Supply Voltage
Approx. 57dB
3.3V DC +/-5%
48LCC
Package type
Operating Temp. range
Current consumption:
0oC - 40oC
Min
Typ
30
Max
TBD
Units
mA
’Snapshot’/self-timer/continuous/tethered
video modes of operation
Standby Mode/PC Suspend Mode, SUS-
PEND pin asserted (see note 1)
<100
<300
TBD
TBD
µA
µA
Standby Mode/PC Suspend Mode, SUS-
PEND pin not asserted (see note 2)
Table 19 : VV6500 Specifications
Notes:
1. Assuming appropriate external hardware recommendations are implemented (see Section 9.), the sensor SUSPEND pin is
30
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asserted during Standby Mode/PC Suspend Mode. Hence the sensor is placed in Sensor Suspend mode by means 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
Mode, the sensor is placed in Sensor Suspend mode by means of a Serial interface message only. This increases current
consumption due to a pull-up on the SUSPEND pin.
Parameter
Min.
Max.
Notes
VIL
VIH
-0.5v
0.3 x VDD
VDD + 0.5v
0.4V
Guaranteed input low voltage
Guaranteed input high voltage
At max IOL for pad type
0.7 x VDD
VOL
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
52µA current
draw
draw
Standard Pulldown (OEB)
25µA current
42µA current
draw
draw
Non-standard Pullup
(RESETB)
66µA current
250µA current
draw
draw
Table 20 : VV6410/6500 DC Characteristics
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.
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7.5.1 Using VV6444 (sensor operates at @ 5V DC)
Typical Current
Mode
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 standby mode
(when NOT 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
Notes:
1. See Table 11 on page 26.
2. From limited evaluation, typical self-refresh current figures of certain SDRAM chips are well below manufacturers’ maximum
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.
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7.5.2 Using VV6410/6500 (sensor operates at @ 3.3V DC)
Mode
Typical
Comments
’Snapshot’/Continuous/
Self timer mode (while
un-tethered)
60mA
Assuming appropriate hardware included, power is sourced from PC
while USB connected.
’Snapshot’/Continuous/
Self timer mode (while
tethered to PC)
60mA
Standby Mode (when
NOT connected to USB):
Sensor SUSPEND pin
asserted (see note 4)
Approx. 0.5mA +
SDRAM self-
refresh current (see
note 2)
Total current in this mode equals:
STV0680A Standby current consumption (see note 1)
+ SDRAM self-refresh current (see note 2)
+ peripheral circuitry (approx. 50µA).
+ Sensor suspend mode current (See note 3)
Total current in this mode equals:
PC Suspend mode
(when connected to
USB): Sensor SUSPEND
pin asserted (see note 4)
Approx. 0.7mA +
SDRAM self-
refresh current (see
note 2)
STV0680A Standby current consumption (see note 1)
+SDRAM self-refresh current (see note 2)
+ peripheral circuitry (approx. 50µA).
+ 200µA , based on 1.5k pull-up in camera (see Section 9.) and 15k
pull-down in PC.
+ Sensor suspend mode current (See note 3)
Table 22 : Current consumption, complete STV0680A+VV6410/6500 camera
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 evaluation, typical self-refresh current figures of certain SDRAM chips are well below manufacturers’ maximum
specification, e.g. 100-250µA. See Section 9. for recommendations.
3. Sensor suspend mode current <100µA when SUSPEND pin asserted, see Table 18 and Table 19.
4. If the appropriate hardware to assert the sensor SUSPEND pin is not fitted, an addditional current consumption in this mode
of up to 200µA can be expected.
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8. STV0680A Pin descriptions and Package Information
8.1 STV0680A Pin Listing
Pin no.
Signal
Type
Description
drive
Sensor Interface
Power-up Sensor
69
68
60
61
62
63
64
65
66
67
SENSPWR
SENSRST
SCL
Output, active high
Output, active low
Input/Output (OD,T)
Input/Output (OD,T)
Input (S,T)
2mA (SL)
2mA (SL)
4mA (SL)
4mA (SL)
Reset Sensor
Sensor serial interface
Sensor serial interface
Sensor data
SDA
SD3
SD2
Input (S,T)
Sensor data
SD1
Input (S,T)
Sensor data
SD0
Input (S,T)
Sensor data
QCLK
SCLKO
Input (S,T)
Qualification clock from sensor
Clock output to sensor
GPIO (see note)
Output
4mA
77
76
GPIO0 (MODE)
Debounced input
Debounced input
Push button (Wake-up/Mode)
Push button (Shutter/Confirm)
8mA (SL)
8mA (SL)
GPIO1
(SHUTTER)
75
74
73
72
71
70
GPIO2
GPIO3 (50/60)
GPIO4
IO (OD)
Debounced input
IO (OD)
Not used (tie to GND with 0R link)
Link to select between 50Hz and 60Hz lighting
Not used (tie to GND with 0R link)
LED indicator
8mA (SL)
8mA (SL)
8mA (SL)
8mA (SL)
8mA (SL)
8mA (SL)
GPIO5
Output (OD)
IO (OD)
GPIO6
Not used (tie to GND with 0R link)
Not used (tie to GND with 0R link)
USB Interface
GPIO7
IO (OD)
42
43
USBDETECT
DATA+
Input (S)
Detect Power source from USB.
(For camera with RS232 only, this pin should be tied to GND)
USB speci-
fication
V1.1 com-
pliant I/O
Input/Output
USB bus
(For camera with RS232 only, this pin should be connected to
test points to allow for USB production test (lens focussing))
44
DATA-
Input/Output
USB bus.
(For camera with RS232 only, this pin should be connected to
test points to allow for USB production test (lens focussing))
RS232 Interface
58
59
TXD
RXD
Output
Serial data transmit
(For camera with USB only, this pin should be tied to RXD)
4mA (SL)
Input (S)
Serial data receive
(For camera with USB only, this pin should be tied to TXD)
STV0680A Master Clocks and Reset
Quartz Crystal IN
48
49
XIN
Input
XOUT
Output
Quartz Crystal OUT
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Pin no.
Signal
Type
Description
drive
51
RESET
Input (S)
Active (LOW) STV0680A reset
System Memory (SDRAM) Interface
Data input/output mask for dram_DQ[15:8]
20
22
DQMU
DCLK
Output
Output
2mA (SL)
4mA
Clock: all SDRAM input signals are sampled on the positive
edge
24
28
CKE
Output
Output
Clock enable: activates (HIGH) and deactivates (LOW) the
SDRAM CLK signal
2mA (SL)
2mA (SL)
AD11
SDRAM address A11 for 64M SDRAM or BA for 16M
SDRAM
31
33
35
37
39
41
40
38
36
34
32
26
30
25
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
AD10
AD12
AD13
CS
Output
Output
SDRAM address A9
SDRAM address A8
SDRAM address A7
SDRAM address A6
SDRAM address A5
SDRAM address A4
SDRAM address A3
SDRAM address A2
SDRAM address A1
SDRAM address A0
SDRAM address A10
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
SDRAM address A12, BA0 for 64M SDRAM, unused on 16M 2mA (SL)
SDRAM address A13, BA1 for 64M SDRAM, unused on 16M 2mA (SL)
Output
Output, active low
Chip select: enables (registered LOW) and disables (regis- 2mA (SL)
tered HIGH) the SDRAM command decoder.
23
21
19
18
16
14
12
10
8
RAS
CAS
WE
Output, active low
Output, active low
Output, active low
Output
SDRAM row address strobe command
SDRAM column address strobe command
SDRAM write enable command
Data input/output mask for dram_DQ[7:0]
SDRAM Data Bus
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
DQML
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
DQ15
DQ14
DQ13
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
SDRAM Data Bus
SDRAM Data Bus
SDRAM Data Bus
SDRAM Data Bus
6
SDRAM Data Bus
4
SDRAM Data Bus
100
2
SDRAM Data Bus
SDRAM Data Bus
5
SDRAM Data Bus
7
SDRAM Data Bus
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Pin no.
Signal
Type
Description
drive
9
DQ12
DQ11
DQ10
DQ9
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
SDRAM Data Bus
SDRAM Data Bus
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
11
13
15
17
SDRAM Data bus
SDRAM Data bus
DQ8
SDRAM Data bus
LCD Interface
85
93
94
95
96
97
98
99
86
87
88
89
90
91
92
LCDCOM
LCD1_6
LCD1_5
LCD1_4
LCD1_3
LCD1_2
LCD1_1
LCD1_0
LCD2_6
LCD2_5
LCD2_4
LCD2_3
LCD2_2
LCD2_1
LCD2_0
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
LCD Common
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
2mA (SL)
LCD digit 1 segment G
LCD digit 1 segment F
LCD digit 1 segment E
LCD digit 1 segment D
LCD digit 1 segment C
LCD digit 1 segment B
LCD digit 1 segment A
LCD digit 2 segment G
LCD digit 2 segment F
LCD digit 2segment E
LCD digit 2segment D
LCD digit 2segment C
LCD digit 2 segment B
LCD digit 2 segment A
Piezo Interface
84
PIEZO
Output
Direct connection to piezo buzzer
Battery Level Comparator Interface
8mA (SL)
80
79
LO_BAT
Input (A)
Input (A)
Battery level comparator input. The voltage on low_bat is
compared to the reference to determine the battery status
LO_BAT_REF
1.22V battery level comparator reference input
Power and Ground
1, 27, 50,
56, 78
DVSS[1-5]
DVDD[1-4]
Power pin
Power pin
Digital Ground
3, 29, 57,
83
Digital Power
52
53
54
55
PLLGVDD
PLLGVSS
PLLAVDD
PLLAVSS
Power pin
Power pin
Power pin
Power pin
PLL Guard Power
PLL Guard Ground
PLL Analog Power
PLL Analog Ground
Non-user pins
45
46
TEST0
TEST1
Input
Input
Non-user pin - connect to 3V3
Non-user pin - connect to 3V3
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Pin no.
Signal
Type
Description
drive
47
81
TEST2
Input
Non-user pin - connect to 3V3
DACRES
Non-user pin
See example schematic in Section 9.
I(A)
DAC bias amplifier reference input
See example schematic in Section 9.
82
DACOUT
Non-user pin
0-10mA (2)
O (A)
8-bit DAC current source output
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 are not ‘general purpose’, in the sense that their function is predetermined (e.g. GPIO0 = MODE, GPIO2 is Unused),
dependant on the variant number of STV0680/STV0680A, denoted by the suffix on the part number -00x.
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8.2 STV0680A pinout diagram
80
LO_BAT
LO_BAT_REF
DVSS5
GPIO0 (MODE)
GPIO1 (SHUTTER)
DVSS1
DQ15
DVDD1
DQ1
DQ14
DQ2
DQ13
DQ3
DQ12
DQ4
DQ11
DQ5
DQ10
DQ6
DQ9
DQ7
DQ8
DQM L
W E
DQMU
CAS
DCLK
RAS
CKE
CS
1
2
3
4
5
6
7
8
79
78
77
76
75 GPIO2
74 GPIO3 (50/60)
73 GPIO4
72 GPIO5 (LED)
71 GPIO6
70 GPIO7
69 SENSPWR
68
67 SCLKO
66 QCLK
65 SD0
64 SD1
63 SD2
62 SD3
61 SDA
60 SCL
59 RXD
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
SENSRST
STV0680A
100QFP
58 TXD
57 DVDD3
56 DVSS4
55 PLLAVSS
54 PLLAVDD
53 PLLGVSS
52 PLLGVDD
51 RESET
AD12
DVSS2
AD11
DVDD2
AD13
Figure 5 : STV0680A pinout in 100QFP package
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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 example 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
(all other access) 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.
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
#
QTYREFDES
1 B1
1 B1
1 C1
2 C3, C4
DEVICE
BATTERY
BATTERY
CAP
CAP
CAP
PACKAGE
VALUE
COST
NOTES
Up to 9v with option 2
Up to 6v with option 1
1
1
2
3
805
805
805
10N
100N
100N
C3, C4 option 2 only
3 22 C2,C7,
C8,C10,C11,
C12,C13,C14,
C17,C18,C20,
C21,C23,C24,
C25,C27,C28,
C29,C30,C31,
C32,C33
3
4
5
6
7
8
8
9
9
1 C37
CAP
CAP
CAP
CAP
805
805
805
805
805
T/H
T/H
DO41
DO41
SOT23
SOT23
805
100N
22P
1U
220P
220N
10U
C37 for option 1 only
2 C5,C6
2 C15,C16
2 C19,C26
1 C22
1 C34
2 C35,C36
1 D1
CAP
ECAP
ECAP
1N4001
Schottky
DIODE
DIODE
FERRITE
10U
C35, C36 option 2 only
1N4001
Schottky
BAS116
BAS16
Gen purpose if 4 x AA or AAA batteries
Only use schottky if 3 x AA or AAA batteries
Must be low leakage
1 D1
10 1 D2
11 2 D3,D4
12 3 F1,F2,F3
13 1 J1
Only for RS232
May be required for FCC compliance
Must be Type B for USB compliance
Only for RS232
USB_CON CON_USB_4 P_ TYPE_B
JACK_SKT SCJ-0355-
2DIGITLC
LED
NPN
NPN
NPN
PNP
PNP
PNP
SI2301DS SOT23
SI2301DS SOT23
SI2301DS SOT23
RES
RES
RES
14 1 J2
B
15 1 LCD1
16 1 LED1
17 1 Q1
17 2 Q2,Q3
18 1 Q4
19 1 Q5
20 1 Q6
20 1 Q10
21 1 Q7
21 1 Q8
21 1 Q9
22 1 R1
2PINTHRU
SOT23
SOT23
SOT23
SOT23
SOT23
SOT23
Could be omitted for reduced current cons.
Q1 only required for option 2
BC848
BC848
Only for RS232
Required for USB inrush protection
Only for RS232
Only required for option 1
Only required for option 2
Required for USB inrush protection
BCW61
805
805
805
220K
220K
6R8
22 1 R4
23 1 R2
R4 only req'd for RS232 camera with USB test points
May be required for USB inrush protection
(Exact value not verified)
24 2 R9,R13
24 1 R3
24 1 R5
RES
RES
805
805
100K
100K
100K
100K
1M
1M
470K
82K
R3 only required for Option 2.
R5 only req'd for RS232 camera with USB test points
R12 required for USB inrush protection
24 1 R12
25 3 R10,R14, R16
25 2 R6,R23
26 1 R7
27 1 R8
28 1 R11
RES
805
Only one of R6/R23 is required
RES
RES
RES
RES
805
805
805
805
430K
510K
Suggested value for 6v battery
Suggested value for 4.5v battery
28 1 R11
Total (Page 1)
Table 24 : STV0680A + VV6410/6500: Parts list (1)
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STV0680A + VV6444/6410/6500
March 2000
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
#
QTYREFDES
DEVICE
RES
PACKAGE
805
VALUE
OR
COST
NOTES
Option 1 only
29 1 R56
29 1 R15
RES
805
OR
For camera with no RS232
30 1 R17
32 2 R19,R20
33 1 R22
34 9 R24,R26,R27,
R37,R38,R42,
R43,R44,R51,R52
35 8 R25,R28,R29,
R31,R32,R33,
R34,R35
RES
RES
RES
RES
805
805
805
805
33R
24R
120K
0R
R24 fitting depends on flicker frequency
Fit R51 or R52, not both
R25 fitting depends on flicker frequency
R31, 32, 33, 34, 35 only for RS232
RES
805
10K
35 1 R41
36 1 R30
37 1 R36
38 2 R39,R40
39 1 R50
RES
RES
RES
RES
RES
805
805
805
805
805
10K
2K2
680R
4K7
390R
R41 only required for option 2
Only for RS232
R50 only required for option 1
Optional battery off switch when not in use
(would lose stored images)
41 1 SW1
TOGGLE_S WI SWITCH
42 2 SW2,SW3
43 1 T1
44 6 TP1,TP2,TP3,
TP4,TP5,TP6
45 1 U1
PUSH_SWI TC FARNELL_
PIEZO FARNELL_9
TESTPOIN T TP
58
26
Push button switches
Only required for RS232
camera with USB prodn. Test
Only required for option 2
Could use TO92 instead
VGA sensor (different foortprint to VV6410)
Only require U2 or U6
Future replacement STV0680A for VfW
SDRAM dual footprint is possible for U4 and U5
Preferred SDRAM has low self refresh Idd.
e.g. (16Mbit) LGM72V16162ET75
3V3REG
VV6500
STV0680
SOT89
48LCC
100QFP
MC78FC33HT1
46 1 U2
47 1 U3
48 1 U4
49 1 U5
GM72V661 64 400MIL_TSOP
GM72V161 62 400MIL_TSOP
Hyundai
Micron
HY57V161610DTC-7
MT48LC1M16A1TG S
50 1 U6
51 1 U8
VV6410
36LCC
CIF sensor (different footprint to VV6500)
Only require U2 or U6
e.g. TELCOM TC54VC2702ECB
RICOH Rx5VLxxC SERIES
VOLTAGE SOP-23
DETECTOR
XTAL
2.7v
threshold
12MHZ
52 1 X1
HC49U
53 1 Lens
Lens with IR filter
Total (Page 2)
Table 25 : STV0680A + VV6410/6500: Parts list (2)
Not all compatible memory chips exhibit a low enough self-refresh current to meet the target current for
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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March 2000
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.
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10.1 VV6444 Pin Listing
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
Pin
Name
Type
Description
POWER SUPPLIES
1
AVCC
AGND
DVDD
PWR
GND
PWR
GND
PWR
GND
PWR
GND
PWR
GND
PWR
PWR
PWR
GND
GND
GND
Core analogue power and reference supplies.
Core analogue ground and reference supplies.
Core digital power.
48
43
44
6
DVSS/Dsub
AVDD
Core digital ground.
Output stage power.
5
AVSS
Output stage ground.
7
VVDD
Analogue output buffer power.
Analogue output buffer ground.
ADC power.
9
VVSS
14
10
19
30
36
20
29
37
ADCVDD
ADCVSS
VDD1
ADC ground.
Digital padring & logic power.
Digital padring & logic power.
Digital padring & logic power.
Digital padring & logic ground.
Digital padring & logic ground.
Digital padring & logic ground.
VDD2
VDD3
VSS1
VSS2
VSS3
ANALOGUE SIGNALS
45
46
47
2
VBLOOM
VBLTW
VBG
OA
Anti-blooming pixel reset voltage
OA
OA
OA
Bitline test white level reference
Internally generated bandgap reference voltage 1.22V
VCM/
VREF2V5
Common-mode input for OSA and Internally generated 2.5 V reference
voltage.
3
VRT
IA
IA
Pixel reset voltage
4
VCDSH
ADCbot
ADCtop
TopRef
VCDS
11
13
13
IA
Bottom voltage reference for ADC
Top voltage reference for ADC
Internally generally top voltage reference for ADC
IA
OA
Pin
Name
Type
Description
DIGITAL CONTROL SIGNALS
12
15
HOLDPIX
SIN
ID↓
ID↓
Test Pin - do not use
Frame timing reset (soft reset).
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Pin
16
Name
Type
ID↑
Description
RESETB
System Reset. Active Low.
SERIAL INTERFACE
42
41
SCL
SDA
ID↑
BI↑
Serial bus clock (input only).
Serial bus data (bidirectional, open drain).
DIGITAL VIDEO INTERFACE
39
38
35
34
D[3]
D[2]
D[1]
D[0]]
ODT
Tristateable 4-wire output data bus. D[3] is the most significant bit.
33
40
17
QCK
FST
OEB
ODT
ODT
ID↓
Tristateable data qualification clock.
Not required by STV0680A
Digital output (tristate) enable.
SYSTEM CLOCKS
31
32
CLKI
ID
Oscillator input.
Oscillator output.
CLKO
OD
Do not connect
Do not connect
18
DNC
21-28
Key
A
Analogue Input
D
Digital Input
OA
BI
Analogue Output
ID↑
ID↓
OD
ODT
Digital input with internal pull-up
Digital input with internal pull-down
Digital Output
Bidirectional
BI↑
BI↓
Bidirectional with internal pull-up
Bidirectional with internal pull-down
Tristateable Digital Output
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Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
30 29 28 27 26 25 24 23 22 21 20 19
31
32
33
34
35
36
37
38
39
40
41
42
18
17
16
15
14
13
12
11
10
9
CLKI
CLKO
QCK
D[0]
NC
OEB
RESETB
SIN
ADCVDD
TopRef/ADCTop
D[1]
VDD3
VSS3
D[2]
VV6444
HOLDPIX
ADCBot
ADCVSS (*)
VVSS
48 pin LCC
D[3]
FST
8
NC
SDA
SCL
7
VVDD
43 44 45 46 47 48
1
2
3
4
5
6
Figure 7 : VV6444 Pinout
Notes:
1. NC - Not connected
2. (*) - Paddle connections
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10.3 VV6444 Package Dimensions
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
4
4.27
A
Pin 6
Pin 1
A
Figure 8 : VV6444 package dimensions in 48LCC (1)
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2.27
1.85
1.12
3
0.90
0.60
0.50
A-A (6 : 1)
Figure 9 : VV6444 package dimensions in 48LCC (2)
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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
16
21
17
23
20
18
15
19
22
D[1]
D[2]
24
25
26
27
28
29
SDA
14
PORB
13
D[3]
SUSPEND
12
D[4]
11 Vid3V3
VV6410
36LCC
LST/D[5]
FST/D[6]
AVSS
10
VDDhi
9
8
CLKI 30
Vbloom
D[7]
31
32
7
6
Vbltw
QCK
AoutN
33
1
34
35
36
3
2
4
5
Figure 10 : 36 pin CLCC package pin assignment
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11.2 VV6410 Pin descriptions
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
Name
Pin Number Type
Description
POWER SUPPLIES
AVSS
10
17
34
GND
GND
PWR
Core analog ground and reference supplies.
In-column SRAM analog ground.
Digital logic power.
SRAMVSS
VDDcore/
Reg3V3
VDDio
VSScore
VSSio
33
22
23
PWR
GND
GND
Digital pad ring power.
Digital logic ground.
Digital pad ring ground.
ANALOG SIGNALS
Vbloom
VBLTW
VBG
8
7
OA
Anti-blooming pixel reset voltage
OA
OA
IA
Bitline test white level reference
1
Internally generated bandgap reference voltage 1.22V
Pixel reset voltage
VRT
2
AIN
4
IA
Analog input to Audio Amplifier
AOutP
AOutN
VDDHI
VBase
Vbus
5
OA
OA
IA
Analog output of Audio Amplifier (positive)
Analog output of Audio Amplifier (negative)
Incoming power supply 4 -> 6V
6
9
35
36
3
OA
IA
Drive for base of external bipolar
Incoming power supply 3.3 -> 6V
Aud3V3
Vid3V3
PORB
OA
OA
OD
On-chip Audio Amplifier Voltage Regulator Output
On-chip Video Supply Voltage Regulator Output
Power-on Reset (Bar) Output.
11
13
DIGITAL VIDEO INTERFACE
D[4]
27
26
25
24
20
32
28
ODT
Tri-stateable 5-wire output data bus.
D[3]
- D[4] is the most significant bit.
D[2]
- D[4:0] have programmable drive strengths 2, 4 and 6 mA
D[1]
D[0]
QCK
LST/D[5]
ODT
ODT
Tri-stateable data qualification clock.
Tri-stateable Line start output
May be configured as tri-stateable output data bit 5 D[5].
Tri-stateable Frame start signal.
FST/D[6]
29
ODT
May be configured as tri-stateable output data bit 6 D[6].
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Name
Pin Number Type
Description
D[7]
31
ODT
Tri-stateable Data wire (ms data bit).
May be configured as tri-stateable output data bit 6 D[6].
Digital output (tri-state) enable.
OEB
16
ID↓
DIGITAL CONTROL SIGNALS
RESETB
21
12
ID↑
ID↑
System Reset. Active Low.
May be configured as System Sync. Active Low.
USB Suspend Mode Control signal. Active High
SUSPEND
If this feature is not required then the support circuit must pull the pin to
ground. The combination of an active high signal and pull up pad was
chosen to limit current drawn by the device while in suspend mode.
SERIAL INTERFACE
SCL
SDA
15
14
BI↑
BI↑
Serial bus clock (input only).
Serial bus data (bidirectional, open drain).
SYSTEM CLOCKS
CLKI
NC
30
ID↓
Schmitt Buffered Clock input or LVDS positive Clock input
Not connected
18, 19
Not connected
Key
A
Analog Input
D
Digital Input
OA
BI
Analog Output
Bidirectional
ID↑
ID↓
OD
ODT
Digital input with internal pull-up
Digital input with internal pull-down
Digital Output
BI↑
BI↓
Bidirectional with internal pull-up
Bidirectional with internal pull-down
Tri-stateable Digital Output
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11.3 VV6410 package Details (36pin CLCC)
± 0 3 1 . 8
3 1 .
s
e
c
R
P
0
a
± 0 2 0 . 1
3 1 .
l
.
5
1
0
4
2 0 . 2
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12. VV6500 Pinout and pin descriptions (48pin LCC package)
12.1 Pinout
30
29
28
27
26
25
24
23
22
21
20
19
31
32
33
34
35
36
37
38
39
40
41
42
18
17
16
15
14
13
12
11
10
9
RESET
D[0]
SCL
SDA
POR
D[1]
SUSPEND
NC
D[2]
D[3]
VCMTCAS
VID3V3
VV6500
48LCC
D[4]
LST/D[5]
FST/D[6]
AVSS
NC
CLKI/CLKIP
CLKIN
VDDHI
VBLOOM
VBLTW
8
D[7]
7
QCK
43
44
45
46
47
48
1
2
3
4
5
6
Figure 11 : 48 pin LCC package pin assignment
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12.2 VV6500 pin descriptions
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
Name
Pin Number Type
Description
POWER SUPPLIES
Core analog ground and reference supplies.
In-column SRAM analog ground.
Digital logic power.
AVSS
SRAMVSS
VDDcore
VDDio
11
21
44
43
29
30
21
GND
GND
PWR
PWR
GND
GND
GND
Digital pad ring power.
Digital logic ground.
VSScore
VSSio
Digital pad ring ground.
In-column SRAM analogue ground.
SRAMVSS
ANALOG SIGNALS
Vbloom
VBLTW
VBG
8
OA
Anti-blooming pixel reset voltage
7
OA
OA
IA
Bitline test white level reference
1
Internally generated bandgap reference voltage 1.22V
Common-mode input for column pre-amp.
Pixel reset voltage
VCMTCAS
VRT
13
2
IA
AIN
4
IA
Analog input to Audio Amplifier
AOutP
AOutN
VDDHI
VBase
Vbus
5
OA
OA
IA
Analog output of Audio Amplifier (positive)
Analog output of Audio Amplifier (negative)
Incoming power supply 4 -> 6V
6
9
46
47
45
OA
IA
Drive for base of external bipolar
Incoming power supply 3.3 -> 6V
Reg3V3
ARef
OA
IA
On-chip Voltage Regulator Output
On-chip Audio Amplifier Reference Input
On-chip Audio Amplifier Voltage Regulator Output
On-chip Video Supply Voltage Regulator Output
Power-on Reset (Bar) Output.
Aud3V3
Vid3V3
PORB
3
OA
OA
OA
12
16
DIGITAL VIDEO INTERFACE
D[4]
D[3]
D[2]
D[1]
D[0]
QCK
36
35
34
33
32
42
ODT
Tri-stateable 5-wire output data bus.
- D[4] is the most significant bit.
- D[4:0] have programmable drive strengths 2, 4 and 6 mA
ODT
Tri-stateable data qualification clock.
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Name
Pin Number Type
Description
CLKIN
40
37
BI↑
LVDS negative Clock input
Tri-stateable Line start output
LST/D[5]
FST/D[6]
D[7]
ODT
May be configured as tri-stateable output data bit 5 D[5].
Tri-stateable Frame start signal.
38
41
20
ODT
ODT
ID↓
May be configured as tri-stateable output data bit 6 D[6].
Tri-stateable Data wire (ms data bit).
May be configured as tri-stateable output data bit 6 D[6].
Digital output (tri-state) enable.
OEB
DIGITAL CONTROL SIGNALS
RESETB
31
31
ID↑
ID↑
System Reset. Active Low.
May be configured as System Sync. Active Low.
USB Suspend Mode Control signal. Active High
SUSPEND
If this feature is not required then the support circuit must pull the pin to
ground. The combination of an active high signal and pull up pad was
chosen to limit current drawn by the device while in suspend mode.
SERIAL INTERFACE
SCL
SDA
18
17
BI↑
BI↑
Serial bus clock (input only).
Serial bus data (bidirectional, open drain).
SYSTEM CLOCKS
CLKI/CLKIP
NC
39
ID↓
Schmitt Buffered Clock input or LVDS positive Clock input
Not connected
10, 14, 19, 22-
28, 48
Not connected
Key
A
Analog Input
Analog Output
D
Digital Input
OA
BI
ID↑
ID↓
OD
ODT
Digital input with internal pull-up
Digital input with internal pull-down
Digital Output
Bidirectional
BI↑
BI↓
Bidirectional with internal pull-up
Bidirectional with internal pull-down
Tri-stateable Digital Output
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12.3 VV6500 package Details (48 pin LCC)
0 3 1 . 0 ± 6 7 1 . 1 1
0 8 0 . 0 ± 6 1 0 . 1
2 0 . 2
) 4 e t o n (
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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 module, containing a STMicroelectronics CMOS sensor +
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
! Note
(PCB0194) have been built, however, these are not identical to the camera described in this reference
design.
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14. Ordering details
Digital Camera Chipset; Customer Datasheet, Rev 3.0,
March 2000
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
Available for download from
http://www.vvl.co.uk/tech_support/
home.htm
Design Manual
VV6410/6500+STV0680A designs
36pin CLCC packaged, microlensed CIF ColourMOS sensor
48pin CLCC packaged, microlensed VGA ColourMOS sensor
Digital camera Evaluation Kit for STV0680/STV0680A+VV6410
Digital camera Evaluation Kit for STV0680/STV0680A+VV6500
VV6410C036
VV6500C001
STV-DCA/CIF-E01
STV-DCA/VGA-E01
STV0680/STV0680A + VV6410/6500 Digital Camera Chipset, Reference
Design Manual
Available for download from
http://www.vvl.co.uk/tech_support/
home.htm
Ordering details
Table 26 :
* 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
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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
.
asiapacific_sales@vvl.co.uk
central_europe_sales@vvl.co.uk
www.vvl.co.uk
www.st.com
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
STMicroelectronics, Imaging Division
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