STV0674T100 ,TRI-MODE CMOS DIGITAL CAMERA CO-PROCESSORfeatures of the dual mode camera, the inclusion of audio record and playback circuitry adds another ..
STV0674T100 ,TRI-MODE CMOS DIGITAL CAMERA CO-PROCESSORfeatures and ■ Tethered video operation over USBprice/performance points. ● Simultaneous video and ..
STV0676 ,CMOS DIGITAL CAMERA CO-PROCESSORFEATURESCMOS image sensors offers highly integrated■ Real-time video - up to 30fps VGAimaging produ ..
STV0676 ,CMOS DIGITAL CAMERA CO-PROCESSORabsolute maximum ratings 144.2 STV0676 AC/DC characteristic 14Chapter 5 Pinout and pin descriptions ..
STV0676 ,CMOS DIGITAL CAMERA CO-PROCESSORgeneral description .51.2 Video processor (VP) ........51.2.1 Sensor interface 51.2.2 Video process ..
STV0681 , DUAL-MODE DIGITAL CAMERA CO-PROCESSOR
T7 ,Industrial GradeELECTRICAL SPECIFICATIONSResistive Element CermetElectrical Travel 270° ± 15° Resistance Range 10 ..
T7024 ,The T7024 is a monolithic SiGe transmit/receive front-end IC with power amplifier, low-noise amplifier and T/R switch driver. It is especially designed for operation in TDMA systems like Bluetooth and WDCT.Features Single 3-V Supply Voltage High Power-added Efficient Power Amplifier (P Typically 23 dBm ..
T7024 ,The T7024 is a monolithic SiGe transmit/receive front-end IC with power amplifier, low-noise amplifier and T/R switch driver. It is especially designed for operation in TDMA systems like Bluetooth and WDCT.Features Single 3-V Supply Voltage High Power-added Efficient Power Amplifier (P Typically 23 dBm ..
T7024 ,The T7024 is a monolithic SiGe transmit/receive front-end IC with power amplifier, low-noise amplifier and T/R switch driver. It is especially designed for operation in TDMA systems like Bluetooth and WDCT.Features Single 3-V Supply Voltage High Power-added Efficient Power Amplifier (P Typically 23 dBm ..
T7024 ,The T7024 is a monolithic SiGe transmit/receive front-end IC with power amplifier, low-noise amplifier and T/R switch driver. It is especially designed for operation in TDMA systems like Bluetooth and WDCT.Features Single 3-V Supply Voltage High Power-added Efficient Power Amplifier (P Typically 23 dBm ..
T7024 ,The T7024 is a monolithic SiGe transmit/receive front-end IC with power amplifier, low-noise amplifier and T/R switch driver. It is especially designed for operation in TDMA systems like Bluetooth and WDCT.Features Single 3-V Supply Voltage High Power-added Efficient Power Amplifier (P Typically 23 dBm ..
STV0674-STV0674T100
TRI-MODE CMOS DIGITAL CAMERA CO-PROCESSOR
July 2003 ADCS 7269750C 1/35
STV0674 ri-mode CMOS digital camera co-processor
DescriptionThe STV0674 is a flexible, scalable digital camera
co-processor for use with the range of CMOS
imaging sensor products from STMicroelectronics.
The same chipset can be used for a wide range of
digital imaging products with unique features and
price/performance points.
The STV0674 is designed for use with CIF
(352x288) or VGA (640x480) ST CMOS image
sensors and provides full exposure control, color
processing and mode control for these sensors.
The STV0674 can be used to implement any of the
following products:
Low cost USB Webcam Camera - a two-chip solution providing up to 30 frames per second VGA
simultaneous video and audio capture.
Dual-Mode Camera - USB webcam and CIF or VGA digital still camera in a single product.
Tri-Mode Camera - USB webcam and digital still camera with the addition of a ‘camcorder’ mode to
allow simultaneous video and audio capture directly
to external memory for later upload to the PC.
Features VGA or CIF CMOS sensor support Hardware color processing and JPEG
compression of image data Still image capture Tethered video operation over USB Simultaneous video and audio capture
USB USB for PC and MacOS (in development)
Flexible external memory options SDRAM for lower cost, (8 or 16 bit) FLASH for non volatile storage (Data + Code) Smartmedia Card for removable data storage EEPROM for code storage
Record simultaneous video and audio direct
to memory while untethered Drivers for PC operating systems Win98,
WinME, Win2K and WIn XP.
Application Block Diagram
STV0674
Table of Contents
Chapter 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51.1 Webcam Mode .....................................................................................................................5
1.2 Dual-Mode (Webcam plus Digital Still Camera) ...................................................................5
1.3 Tri-Mode (Webcam plus Digital Still Camera plus Digital Movie/Audio Recorder) ...............5
Chapter 2 STV0674 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62.1 Sensor interface ...................................................................................................................6
2.2 Video processor ...................................................................................................................6
2.3 Video compressor ................................................................................................................6
2.4 Microcontroller ......................................................................................................................7
2.5 Memory interfaces ................................................................................................................7
2.6 Audio record .........................................................................................................................8
2.7 Audio playback .....................................................................................................................8
2.8 USB PC interface .................................................................................................................8
2.9 Power requirements .............................................................................................................8
Chapter 3 STV0674 Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.1 Webcam with audio ..............................................................................................................9
3.2 Tri-mode camera ................................................................................................................10
Chapter 4 Detailed Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114.1 Absolute maximum ratings .................................................................................................11
4.2 DC characteristics ..............................................................................................................11
4.3 SDRAM interface ...............................................................................................................13
4.4 NAND flash interface ..........................................................................................................15
4.5 USB interface .....................................................................................................................20
4.6 Audio ..................................................................................................................................21
4.7 SFP AC parameters ...........................................................................................................22
4.8 Sensor interface .................................................................................................................22
4.9 Device current consumption in run and suspend modes ...................................................23
Chapter 5 Pinout and Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245.1 Device pinout .....................................................................................................................24
STV06745.2 Pin description ....................................................................................................................26
5.3 Package outline and mechanical data ...............................................................................31
5.4 External circuits ..................................................................................................................32
Chapter 6 Evaluation Kit and Reference Design Manuals . . . . . . . . . . . . . . . . . . . . . . . . .336.1 Evaluation kit ......................................................................................................................33
6.2 Reference design manuals ................................................................................................33
Chapter 7 Ordering Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
STV0674
Revision History
STV0674 Overview Overview The STV0674 can be used to implement 3 different low-cost CMOS camera products as detailed
here below.
1.1 Webcam ModeSTV0674 allows a two-chip solution to provide a USB webcam, which can acquire and display
images on the host system at frame rates of up to 30fps VGA. The addition of an external
microphone allows simultaneous audio acquisition. Custom drivers require an additional low cost
EEPROM which allows USB parameters such as Vendor ID /Product ID to be customised.
1.2 Dual-Mode (Webcam plus Digital Still Camera)While retaining all the features of the webcam, the addition of external storage memory allows the
functionality of a digital still camera. On-chip JPEG compression permits high-density picture
storage.
16Mbit to 128Mbit of SDRAM (8 or 16 bit) and/or 32Mbit to 1Gbit NAND flash memory are
supported by the device. Also supported are the popular Smart Media Cards (SMC) to extend non-
volatile storage capability. The wide range of memory support allows the camera builder to tailor the
system cost to suit their target market.
A continuous image acquisition mode allows untethered (no host connection) video clips to be
taken. As an example, with 15:1 compression ratio and 128Mbit memory over two minutes (QVGA
@10fps) worth of video can be stored and up-loaded for display on the host.
Full Direct Show driver support for Windows 98SE, ME, Windows 2000, Win XP is available.
MacOS is currently in development.
1.3 Tri-Mode (Webcam plus Digital Still Camera plus Digital Movie/Audio
Recorder)Again, retaining the features of the dual mode camera, the inclusion of audio record and playback
circuitry adds another dimension to the product. An in-system microphone allows audio to be
recorded and played back either via a speaker on the camera or via the host sound system. Audio
can either be recorded simultaneously with video (camcorder) or independently of image acquisition
(dictaphone). Audio data can also be the host and played back on the camera
when events take place. This allows any sampled soundbites to be played back on cameras, as
opposed to the normal beeps from traditional cameras, which offers many possibilities for language
customisation or licensed “character” cameras.
As well as the memory and audio options already described, the GPIO and firmware emulation
make it possible to support other custom peripherals such as icon or area displays.
Other custom peripherals such as icon or area displays can be support via uncommitted general
purpose I/O under firmware control.
ST Microelectronics provides a software development kit (SDK) allowing OEMs to create custom
PC applications, and an OEM pack to modify drivers to their specific requirements.
STV0674 Functional Description STV0674 STV0674 Functional DescriptionThe STV0674 uses a combination of hardware functions and firmware to implement the required
features. While the following features are selected and controlled via firmware their operation is
carried out by dedicated hardware core. All dedicated hardware functions use fixed pin numbers
which are detailed in Section 5.2.
2.1 Sensor interfaceThe sensor interface is compatible with ST Microelectronics CIF and VGA sensors. This interface
consists of a 5-wire sensor data output with additional sync signals, clocking, and I2 C interface for
configuration. All sensor communications, exposure/gain control, color processing, white balance
control, and clocking are handled automatically by STV0674.
2.2 Video processorThe video processor (VP) provides formatted YCbCr 4:2:2-sampled digital video at frame rates up
to 30 frames per second to the video compressor (VC) module or internal video FIFO. The VP also
interfaces directly to the image sensors. The interface to the sensor incorporates: a 5-wire data bus SDATA[4:0] that receives both video data and embedded timing references. a 2-wire serial interface SSDA,SSCL that controls the sensor and the sensor register
configuration. the sensor clock SCLK.
The video processing engine performs the following functions on incoming data full colour restoration at each pixel site from Bayer-patterned input data defect correction matrixing/gain on each colour channel for colour purity auto white balance, exposure and gain control peaking for image clarity gamma correction colour space conversion (including hue and saturation control) from raw RGB to YCbCr[4:2:2].
2.3 Video compressorThe video compression engine performs 3 main functions: Up scaling of input YCbCr 4:2:2 video stream from the VP (typically to scale from QVGA to CIF
image formats), Compression and encoding of YCbCr stream into Motion-JPEG (M-JPEG) format, FIFO monitoring.
The data stream from the VP can be up to VGA size. The scaler in VC can downsize this image.
Once scaled, the video stream is then converted into M-JPEG format. M-JPEG treats video as a
series of JPEG still images. The conversion is released via a sequential DCT (Discrete Cosine
Transform) with Huffman encoding. After transfer through the digiport or over USB, the M-JPEG
stream can be decoded in the host.
STV0674 STV0674 Functional DescriptionThe VC module varies the compression ratio to match the scene and selected frame rate, to the
FIFO fill state. The VC module is capable of compression ratios of up to 100:1.
Thumbnails can also be generated within the VC for potential display on an image LCD.
The final stage of the VC block manages the data transfer rate from the local VC FIFO store to the
memory or USB core. The VC can perform this management automatically, by employing long-term
(frame-level) and short-term (block-level) compression management.
2.4 MicrocontrollerThe STV0674 has an embedded high-performance 8052 8-bit microcontroller with 32 Kbytes of
ROM and 32 Kbytes of SRAM available for program memory.
The device functionality provided by default program ROM is generally sufficient to address all
needs of a USB-tethered camera.
In STV0674, code can be executed from the local SRAM as well as default ROM. The default ROM
provides basic functions such as USB control, memory control, VP setup, systems installation, and
the transfer of application specific code into the local SRAM.
In non-tethered applications, the SRAM can be loaded from off-chip EEPROM via I2 C or from an
external flash device. If required in tethered applications, the SRAM can be loaded from the host PC
via the USB.
The ROM bootloader will load the application specific firmware code from one of the following
sources, in order of priority: EEPROM. NAND FLASH. PC host (in the case of a webcam).
2.5 Memory interfaces
2.5.1 NAND FLASH memory/SmartMedia card interfaceThe NAND FLASH module for the STV0674 provides a dedicated interface to an external 32 Mbit to Gbit NAND FLASH chip, and/or 4 Mbyte to 128 Mbyte SmartMedia card.
NAND flash devices can contain a number of bit errors, and the core may deteriorate over time.
Both occurrences are handled automatically by STV0674.
A camera using NAND flash for image storage has the advantage that it can be powered off (e.g.
auto power off, or for changing batteries) without losing images. No serial EEPROM is required as
the application specific programme code can be stored in NAND flash memory.
Note:1 Support for SMC is for 3V3 cards. 5V cards are not supported. Standard digital camera file formats (e.g. DOS file format, SSFDC) are not supported on SMC cards
at this time.
2.5.2 SDRAM interfaceThe STV0674 can use SDRAM for image storage and is designed to operate with PC66 or better
compliant devices and supports 16Mbit, 64Mbit and 128Mbit parts in both the x16 SDRAM or x8
DRAM word widths.
It is recommended that any SDRAM used have low self refresh Idd.
STV0674 Functional Description STV0674
2.5.3 EEPROM interfaceThe STV0674 supports up to 512Kbit EEPROM to hold application specific firmware code. Also, in
the case of a tethered only web cam, lower density EEPROMs (down to 1Kbit) can be used to store
information regarding custom USB Product ID, Vendor ID and power consumption.
2.6 Audio recordThe audio record block consists of a 16bit delta-sigma ADC using sampling frequencies of 8 kHz,
11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz, 44.1 kHz and 48 kHz, with either differential or single
ended inputs. The sampled output can be 8 or 16 bit.
2.7 Audio playbackAudio playback is achieved by an internal Pulse Width Modulator with sample rates of 8kHz,
11.025kHz, 16kHz, 22.05kHz, 32kHz or 44.1kHz, connected to either an external amplifier chip and
loudspeaker/ headphone socket or to a simple piezo buzzer.
2.8 USB PC interfaceThe STV0674 includes a USB version 1.1 compliant Universal Serial Bus interface which requires
the minimum of additional hardware. The interface key features are listed here below. Compliant with USB protocol revision 1.1 USB audio class compliant 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 Twin bulk end points (in/out)
USB drivers are supplied by ST. For USB timing information, please refer to the USB specification
version 1.1.
2.9 Power requirementsSTV0674 requires a 3V3 supply for I/O and a 1V8 supply for the core.
STV0674 STV0674 Application Examples STV0674 Application ExamplesThe initial STV0674 released by ST Microelectronics is supplied with generic firmware application
code to realise one of the following camera types.
3.1 Webcam with audio
3.1.1 OverviewThis camera uses the minimum of external components and has no user interface, batteries or
memory for image storage. It is used as a tethered video capture camera over USB, with
simultaneous audio and video. It is controlled entirely through PC drivers. The application specific
firmware is the PC.
Note: A custom USB PID/VID can be configured by the use of an EEPROM, if required.
3.1.2 Application diagram
Figure 1: Application diagram when using STV0674 as webcam with audio
STV0674 Application Examples STV0674
3.2 Tri-mode camera
3.2.1 OverviewApplications with the tri-mode camera based on STV0674 range from low-cost cameras containing
an icon LCD status display, microphone/speaker and small SDRAM chip (for example 16Mbit), to an
enhanced feature set camera containing a graphical image LCD display for image review, flashgun,
audio record/playback, NAND flash on the PCB and a SmartMedia flash memory socket.
3.2.2 Application diagram
Figure 2: Application diagram when using STV0674 as tri-mode camera
STV0674 Detailed Specifications Detailed Specifications
4.1 Absolute maximum ratings
4.2 DC characteristics Refer to the sensor datasheet to determine operating temperature range of complete
application
Table 1: DC characteristics
Detailed Specifications STV0674Note:1 VDI = |(D+) - (D-)|
2VCM includes VDI range. These figures apply to sfp, sensor_clk, sensor_scl, sensor_sda, test_mode and sensor_db. They do
not apply to the XTAL_IN pad, these are specified separately. In normal operation the actual device operating voltage is the worst case figure of the PLL and Core
supplies, or 1.60V to 1.95V. Below measurable limits. See Section4.9
Table 1: DC characteristics
STV0674 Detailed Specifications
4.3 SDRAM interface
Read/write timing diagrams for external synchronous DRAM
Figure 3: SDRAM read timing
Detailed Specifications STV0674Note:1 The SDRAM interface is designed to operate with SDRAM devices which are compliant with the
Intel SDRAM Specification Revision 1.7 November 1999. Speed grades 66, 100 and 133MHz are
compatible. Above timing assumes 20pF load per pad.
Figure 4: SDRAM write timing
Table 2: SDRAM timing
STV0674 Detailed Specifications
4.4 NAND flash interface
4.4.1 Command latch cycle for NAND flash interface
4.4.2 Address Latch Cycle for NAND Flash Interface
Figure 5: Command latch cycle
Figure 6: Address latch cycle
Detailed Specifications STV0674
4.4.3 Input data latch cycles for NAND Flash interface
4.4.4 Sequential output cycle after read for NAND Flash interface
Figure 7: Input data latch cycle
Figure 8: Sequential output cycle after read
STV0674 Detailed Specifications
4.4.5 Status read cycle for NAND flash interface
4.4.6 Read operation for NAND flash interface
Figure 9: Status read cycle
Figure 10: Read operation
Detailed Specifications STV0674
4.4.7 Reset operation for NAND flash interface
Figure 11: Reset operation
