April 2006 Rev 2 1/22
1
STV0676
CMOS digital camera co-p rocessor
Features
■Real-time video - up to 30fps VGA
■USB 1.1 compliant
■Motion-JPEG compression
■Isochronous USB data transfer
■Direct Show driver support
■Programmable vendor ID
■RGB-preview, YCrCb or M-JPEG video output
■Automatic exposure, gain and white balance
Description
The STV0676 co-processor combined with ST
CMOS image sensors offers highly integrated
imaging products which deliver USB 1.1, RGB-
preview, YCrCb or M-JPEG digital video data at
up to 30 frames per second.
The STV0676 interfaces to CIF (352 x 288) or
VGA (640 x 480) image sensor and performs:
– pixel defect correction,
– auto exposure, auto gain,
– auto white balanc e, anti-aliasing, an ti-
flicker ,
– colour interpolation, co lou r balanc e,
– gamma correction,
– M-JPEG compression.
STV0676 chipsets are supported by a fully-
featured USB driver. This provides a wide range
of user definable settings for optimum camera
setup and operation. Isochronous data transf er
over USB guarantees video quality at all times,
irrespective of the number of other peripherals.
Low power consumption, highly integrated
designs and simple support circuitry enable
OEMs to design low cost, low power, camera
products for high volume consumer market
places.
STMicroele ctronics offers camera manu facturers
rapid-to-market camera products supported by
comprehensive reference designs, software
drivers and technical backup.
Applications
■USB camera
– Biometric identification, toys and games
■Embedded applications support
– PDA, notebook PC, mobile phone
– Set top box, and security applications
Typical application
CMOS Sensor
CIF or VGA
lens + IR filter
to host PC
USB Cable
STV0676
EEPROM
image
array
MIcro
Processor
USB
Interface
Video
Compression
Video
Processor
www.st.com
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Contents STV0676
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Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 STV0676 co-processor general description . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Video processor (VP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.1 Sensor interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.2 Video processor functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Auto exposure and gain control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Defect correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Video compression (VC) engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6 Control processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.7 Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 External interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 USB inter face . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Selecting VID and PID via the digiport . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Serial EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5 EEPR OM format and contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6 Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.7 CheckSum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.8 I2C slave mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.9 Digiport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.10 Genera l purpose input and output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 STV0676 application example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 USB webcam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Embedded camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Pinout and pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 STV0676 pin details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Detailed specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 STV0676 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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5.2 STV0676 AC/DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 Reference design and evaluation kits . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8 Design issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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Overview STV0676
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1 Overview
1.1 STV0676 co-processor general description
The STV0676 is a digital video processor requiring no external RAM and a minimum of
passive support components to provide a complete USB camera. STV0676 accepts raw
digital video data from a ST VG A or CIF format CMOS sensor and is capable of transf erring
the resulting JPEG data to a host PC over USB at rates up to 30 frames per second VGA.
The internal STV0676 architecture consists of a number of separate functional blocks:
●Video pr oces sor (VP)
●Video co mpr ess or (VC)
●USB control block
●General purpose controller
The VP controls the sensor and processes the raw RGB pixel data into YCbCr images.
This YCbCr data is compressed by the VC.
The USB control block transfers the compressed data to the host PC.
1.2 Video processor (VP)
1.2.1 Sensor interface
The VP interfaces directly to the image sensor. The sensor interface comprises:
●5-wire data bus SDATA[4:0] for receiving both video data and embedded timing
references,
●2-wire serial control interface (SSDA, SSCL),
●sensor clock SCLK
●reset circuitry
●sensor suspend control
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Figure 1. Block diagram of STV0676 video processor module
1.2.2 Video processor functions
STV0676 provides a master clock SCLK to the camera module. Each 10-bit pixel value
generated by the sensor is transmitted across the 5 wire databus SDATA[4:0] as a pair of
sequential 5-bit nibbles, most significant nibble first. Codes representing the start and end
frames and the start and end of lines are embedded within the video data stream to allow
the video processor to synchronise with the video data stream.
The video processing engine performs the following functions on incoming data:
●full colour restoration at each pixel site from Ba yer-patterned input data,
●matrixing/gain on each colour channel for colour purity,
●peaking for image clarity,
●gamma correction,
●colour space conversion from raw RGB to YCbCr[4:2:2].
The 2-wire sensor serial interface (SSDA and SSCL) provides control of sensor
configuration.
Note: The MSBit SDATA5 of the databus is unused in the current application but it will support
future sensors where a 12bit ADC architecture may be used.
Video compression (VC) engineVideo processor
Stream
Digiport
D+
D-
Clocks
+ PLL
12MHz
XTAL
8052 Core
ROM
GPIO/mode
10
STV0676
RAM
Compressed Data
contr ol +
FIFOs
Ext.
Interrupts
CIF/VGA
sensor
10
I2C Interface
USB core /glue
logic and
command FIFO’s
General purpose
housekeeper functions
including AEC, AGC and
AWB
SDA
SCL
RESET
SDATA[4:0]
SSCL
SSDA
RESET_N
SCLK
SUSPEND
select
USB port
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1.3 Auto exposure and gain control
The STV0676 automatically controls the sensor exposure, which is evaluated (and, where
necessary modified) once per frame, where a frame consists of 2 video fields. The video
fields are identical in length, that is, they do not contain any of the half line detail of the
analogue video standards like CCIR or NTSC. Two fields per frame are required by the
internal sensor video timing model. Integration time, sensor analogue gain and STV0676
digital gain are all used to control the overall exposure. The STV0676 exposure algorithm
uses an asymptotic approach in calculating the change required in the present exposure
value to approach the requested exposure target.
1.4 Defect correction
STV0676 automatically detects and corrects pixel defects without the need for any
additional components or sensor calibration procedures. This greatly simplifies camera
assemb ly and test when compared with previous EEPROM-based defect correction
schemes. The pixel defect correction scheme ensures that the STV0676 + ST CMOS
sensor appears as a ‘defect free’ chipset.
1.5 Video compression (VC) engine
The video compression engine performs 3 main functions:
●up scaling of input YCbCr 4:2:2 video stream from the VP (typically to scale from QV GA
to CIF image formats),
●compression and encoding of YCbCr stream into Motion-JPEG (M-JPEG) format,
●USB bandwidth 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
simply treats video as a series of JPEG still images. The conversion is realised via a
sequential DCT (discrete cosine transf orm) with Huffman encoding. After transf er ov er USB,
the M-JPEG stream is decoded in the device driver running on the host.
The VC module is capable of compression ratios of up to 100:1 although this is scene-
dependent. Image framerate produced by the STV0676 chipset is fixed and furthermore the
av ailable USB bandwidth is also fixed (within the software driver). The VC module varies the
compression ratio to match the fluctuating input video data rates to the available USB
bandwidth and required framerate.
The final stage of the VC block manages the data transfer from the local VC FIFO store to
the USB core. STV0676 performs this management automatically by employing long-term
(frame-level) and short-term (block-level) compression management.
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1.6 Control processor
The embedded 8052 microprocessor core controls the data flow through the major sub
blocks within STV0676 as well as the I2C communications to reconfigure the VP
corresponding to requests from the device driver.
1.7 Power management
The chipset conforms to all power requirements specified by USB Version 1.1.
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2 External interfaces
2.1 USB interface
The USB interface is designed to be compliant with version 1.1 of the USB specification.
The STV0676 is a low power device and is therefore suitable for connection to any USB port
on a PC, self-powered hub or when connected to a bus-powered hub.
The device complies with the device framework specified in Chapter 9 of the USB
specification as follows:
●The device supports a single high power configuration (
Config uration 1
).
●Endpoint 0 is the default control endpoint and is always supported.
●Endpoint 0 supports all of the USB commands required by the device framework.
●Vendor specific commands on Endpoint 0 are used for all device control.
●Configuration 1 supports a single interface (interface 0).
●Interface 0 supports 8 alternate settings (alternates 0-7).
●The alternate settings support between 0 and 2 additional endpoints.
●Endpoint 1 is used for isochronous transfer of image data.
●Endpoint 3 is used for transferring status information, e.g. state of a hardware button.
●The endpoints are configured as follows (
Table 1
) in the alternate settings:
The best and most consistent performance in terms of image quality is always obtained in
the highest bandwidth setting (alternate 7). Under some circumstances it may not be
possible for the host to allocate this amount of USB bandwidth to the device.
The isochronous settings reserve v arying quantities of bandwidth - from 10% to 85% of USB
bandwidth. The lower settings result in poor image quality due to heavy compression
applied to maintain a high framerate streaming of image data, but at the same time leaving
more bandwidth free for other USB devices. This is desirable if more than one camera is to
be used, or if there are other isochronous peripherals connected. The device driver allows
the user to specify the maximum bandwidth they wish to allocate to transfer data from the
device. If the maximum specified by the user is not available, perhaps because another
isochronous device has already reserved that bandwidth, then lower alternates are tried
until one succeeds.
Table 1. Endpoint alternate settings
Alternate setting Endpoint1 (isochronous) Endpoint3 (interrupt)
0 Not present Not present
1 Not present 8 bytes / packet; 1 packet /8 frames
2 128 bytes / packet; 1 packet / frame 8 bytes / packet; 1 packet /8 frames
3 384 bytes / packet; 1 packet / frame 8 bytes / packet; 1 packet /8 frames
4 640 bytes / packet; 1 packet / frame 8 bytes / packet; 1 packet /8 frames
5 768 bytes / packet; 1 packet / frame 8 bytes / packet; 1 packet /8 frames
6 896 bytes / packet; 1 packet / frame 8 bytes / packet; 1 packet /8 frames
7 1023 bytes / packet; 1 packet / frame 8 bytes / packet; 1 packet /8 frames
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Benchmark testing of the STV0676 indicates that 30fps CIF video (compressed) can be
accommodated in 50% of USB bandwidth.
2.2 Mode selection
All USB de vices report a VID, PID and power consumption as part of a standard device
descriptor. The VID and PID for STV0676 can be configured by the state of the digiport bits
or by using an external EEPROM. The mode selection is made using the two MODESEL
pins as described in
Table 2
below.
2.3 Selecting VID and PID via the digiport
Tables 4~7 demonstrate how the VID/PID information is defined via the digiport.
The current reference design for the STV0676-chipset has digiport[7:0] connected to VSS,
thus the VID and PID are 16’h0553 and 16’h0140 respectively.
The digiport also controls the device current consumption that is reported to the host at
device enumeration.
Table 2. Mode selection
MODESEL[1] MODESEL[0] Mode of operation
00
USB Mode. External EEPROM fitted, therefore PID, VID
and power consumption read from this source.
See
Section 2.4
10Slave I
2C mode.
01
USB mode. Default. No external EEPROM fi tted , the PID
VID and powe r consumption data determined by
digiport[7:0]. See
Section 2.3
11Reserved
Table 3. Basic digiport configuration
Digiport bit slice Function
[3:0] configures the LS nibble of the PID
[5:4] master VID/PID select
[7:6] power setting
Table 4. Digiport LS nibble configuration
digiport[3:0] PID LS nibble
4’b0000 4’b0000
4’b0001 4’b0001
4’b0010 4’b0010
4’b0011 4’b0011
4’b0100 4’b0100
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2.4 Serial EEPROM
STV0676 is designed to be used with a 128 or 256 byte serial I2C EEPR OM . Th e EEP R O M
can be programmed with data to allow a user to fully customise the USB identity of
STV0676. The configuration of this data is as follows.
4’b0101 4’b0101
4’b0110 4’b0110
4’b0111 4’b0111
4’b1000 4’b1000
4’b1001 4’b1001
4’b1010 4’b1010
4’b1011 4’b1011
4’b1100 4’b1100
4’b1101 4’b1101
4’b1110 4’b1110
4’b1111 4’b1111
Table 5. Master VID/PID selection
digiport[5:4] VID/PID reported
2’b00 16’h0553/16’h014x(1)
1. The ‘x’ ls nibble of the PID is defined by the value from
Table 4
above
2’b01 16’h0553/16’h015x(1)
2’b10 16’h0553/16’h026x(1)
2’b11 16’h0553/16’h017x(1)
Table 6. Device power consumption indicator
digiport[7:6] current consumption reported
2’b00 98mA
2’b01 250mA
2’b10 350mA
2’b11 500mA
Table 4. Digiport LS nibble configuration (continued)
digiport[3:0] PID LS nibble
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2.5 EEPROM format and contents
The remaining space is available for the string blocks indexed at locations 8, 9 and 10.
2.6 Strings
The strings referred to above (locations 8-10), are the USB string descriptors referenced
from the device, configuration and interface descriptors. The value should be set to ’0’ if the
string is not implemented or to the offset in bytes of the start of the string block in the
EEPROM.
The first byte of each string block is the number of the characters in the string. Subsequent
bytes are the actual string, which need not include a terminating null (
Table 8
:).
Table 7. EEPROM format and contents
Location Contents
0 fixed num ber, must be 0x’ED
1 fixed number, mus t be 0x’1 5
2 reserved, must be 0x’00
3 max device power (=mA/2, e.g. 400mA enter 0x’C8)
4 VidLo, low byte of the vendor ID
5 VidHi, highbyte of the vendor ID
6 PidLo, low byte of the product ID
7 PidHi, highbyte of the product ID
8 manufacturer string offs et, example below
9 product string offset, see below
10 interface 0 String offset
11 reserved, must be 0x’00
12 reserved, must be 0x’00
13 checksum
Table 8. EEPROM device string example
Location Contents
8 Manufacturer string offset = 16
16 String length = 5
17 String text = ‘H’ (in ascii)
18 String text = ‘e’ (in ascii)
19 String text = ‘l’ (in ascii)
20 String text = ‘l’ (in ascii)
21 String text = ‘o’ (in ascii)
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2.7 CheckSum
The checksum is calculated by adding the byte value of EEPROM locations 0 to 12
inclusive, the low order byte of the result is stored in location 13.
2.8 I2C slave mode
STV0676 can be configured to behave as an I2C slave. This allows the device to be
configured by host devices other than PCs. Details of the I2C messages supported and
desc ription of the I2C register bank are available from STMicroelectronics.
2.9 Digiport
The Digiport is a 10-bit bi-directional data port which can be used to transf er video data in or
out of the device. This port can also be used to configure USB descriptor information at
power up see (
Section 2.3
). Full details on the digiport operation and control are available
from STMicroelectronics.
2.10 General purpose input and output
STV0676 provides up to 8 pins which can be used as general purpose I/O. These pins can
be used to interface to led’s, buzzers, switches etc.
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3 STV0676 application example
3.1 USB webcam
Figure 2
shows a block diagram of a basic webcam using the minimum of ex ternal
components. The camera is controlled entirely through PC drivers over USB.
Note: If required a custom USB PID/VID can be configured by the use of an EEPROM, as detailed
in Section 2.3
Figure 2. Webcam block diagram
3.2 Embedded camera
Figure 3
shows a block diagram of a camera intended for embedded applications, outputting
JPEG, YCrCb or RGB preview o v er an 8bit bus, the third party electronics would control the
STV0 676 us ing I2C.
Figure 3. Embedded camera block diagram
CMOS sensor
CIF or VGA
Lens + IR filter
to host PC
USB Cable
STV0676
EEPROM
Image
array
MIcro
Processor
USB
Interface
Video
Compression
Video
Processor
CMOS Sensor
CIF or VG A
lens + IR filter STV0676
Image
array
MIcro
processor
FIFO
Video
compression
Video
processor
Digiport Third party
electronics
I2C
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4 Pinout and pin descriptions
4.1 STV0676 pin details
Figure 4. STV0676 pinout
IO_VDD
SW0_N
IO_VDD
CORE_VSS
TEST_CONF[1]
USB_DP
EEPROM_SDA
EEPROM_SCL
USB_DN
PLL_VDD
PLL_VSS
XTAL_IN
XTAL_OUT
CORE_VSS
IO_VDD
IO_VSS
DIGIPORT[9]
RESET_N
GPIO[7]
IO_VSS
RESERVED[2]
SW1_N
SSDA
SSCL
IO_VSS
DIGIPORT[5]
CORE_VDD
TEST_CONF[0]
TEST_CONF[2]
SPDN
CORE_VDD
MODESEL[1]
IO_VSS
RESERVED[0]
MODESEL[0]
DIGIPORT[7]
DIGIPORT[8]
DIGIPORT[6]
RESERVED[4]
RESERVED[3]
RESERVED[1]
DIGIPORT[4]
DIGIPORT[3]
DIGIPORT[2]
DIGIPORT[1]
DIGIPORT[0]
IO_VDD
IO_VSS
CORE_VDD
CORE_VSS
SENSOR_CLK
SENSOR_DB[5]
SENSOR_DB[4]
SENSOR_DB[3]
SENSOR_DB[2]
SENSOR_DB[1]
SENSOR_DB[0]
1
17
16
32
33
48
4964
GPIO[6]
GPIO[5]
GPIO[4]
GPIO[3]
GPIO[2]
GPIO[1]
GPIO[0]
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Table 9. STV0676 pin description
Pin Signal Type Description
Power supplies
4 PLL_VDD INPUT VDD for internal phase locked loop
5 PLL_VSS INPUT GND for internal phase locked loop
8 CORE_VDD INPUT VDD for core logic
9 CORE_VSS INPUT Ground for core logic
10 IO_ VDD INPUT VDD for pad ring
11 IO_VSS INPUT Ground for pad ring
22 IO_ VDD INPUT VDD for pad ring
23 IO_VSS INPUT Ground for pad ring
24 CORE_VDD INPUT VDD for core logic
25 CORE_VSS INPUT Ground for core logic
39 IO_ VDD INPUT VDD for pad ring
40 IO_VSS INPUT Ground for pad ring
49 IO_VSS INPUT Ground for pad ring
57 IO_ VDD INPUT VDD for pad ring
58 IO_VSS INPUT Ground for pad ring
59 CORE_VDD INPUT VDD for core logic
60 CORE_VSS INPUT Ground for core logic
Device master clock and reset
6 XTAL_IN ANA System clock pad
7 XTAL_OUT OSC System clock pad
33 RESET_N SCHMITT System, power-on-reset supplied by companion sensor
Digiport/usb configuration interface
12 DIG IPORT[9] BIDIR Digiport operation
13 DIG IPORT[8] BIDIR Digiport operation
14 DIGIPORT[7] BIDIR Digiport operation /programmable USB current consumption reported
15 DIGIPORT[6] BIDIR Digiport operation /programmable USB current consumption reported
16 DIGIPORT[5] BIDIR Digiport operation /programmable USB VID/PID
17 DIGIPORT[4] BIDIR Digiport operation /programmable USB VID/PID
18 DIGIPORT[3] BIDIR Digiport operation /programmable USB PID
19 DIGIPORT[2] BIDIR Digiport operation /programmable USB PID
20 DIGIPORT[1] BIDIR Digiport operation /programmable USB PID
21 DIGIPORT[0] BIDIR Digiport operation /programmable USB PID
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Sensor interface
26 SENSOR_CLK BIDIR Sensor clock
27 SENSOR_DB[5] INPUT Sensor data bus [bit5]
28 SENSOR_DB[4] INPUT Sensor data bus [bit4]
29 SENSOR_DB[3] INPUT Sensor data bus [bit3]
30 SENSOR_DB[2] INPUT Sensor data bus [bit2]
31 SENSOR_DB[1] INPUT Sensor data bus [bit1]
32 SENSOR_DB[0] INPUT Sensor data bus [bit0]
34 SSDA 3 state Sensor serial interface data
35 SSCL 3 state Sensor serial interface clock
36 SPDN BIDIR Control line to sensor to select ultra low power SUSPEND mode
Misc. control
37 SW1 _N INPUT Spare switch input
38 SW0 _N INPUT Rem ote wakeup
GPIO interface/ other
41 GPIO[0] BIDIR General purpose input/output (GPIO)
42 GPIO[1] BIDIR General purpose input/output (GPIO)
43 GPIO[2] BIDIR General purpose input/output (GPIO)
44 GPIO[3] BIDIR General purpose input/output (GPIO)
45 GPIO[4] BIDIR General purpose input/output (GPIO)
46 GPIO[5] BIDIR General purpose input/output (GPIO)
47 GPIO[6] BIDIR General purpose input/output (GPIO)
48 GPIO[7] BIDIR General purpose input/output (GPIO)
50 MODESEL[0] BIDIR Along with ModeSel[1] used to configure I2C interface and PID/VID
selection. Please see
Table 2
for further details
51 RESERVED[0] BIDIR Not connect in reference design
52 RESERVED[1] BIDIR Connect to VDD in reference design
53 MODESEL[1] BIDIR Along with ModeSel[0] used to configure I2C interface and PID/VID
selection. Please see
Table 2
for further details
54 RESERVED[2] BIDIR Connect to VDD in reference design
55 RESERVED[3] BIDIR Not connect in reference design
56 RESERVED[4] BIDIR Not connect in reference design
Table 9. STV0676 pin description (continued)
Pin Signal Type Description
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STV0676 Pinout and pin descriptions
17/22
USB interface
61 USB_DN BIDIR USB data line
62 USB_DP BIDIR USB data line
Test mode selection
1 TEST_CONF[0] INPUT Test configuration bit - connect to VDD for normal operation
2 TEST_CONF[1] INPUT Test configuration bit - connect to VDD for normal operation
3 TEST_CONF[2] INPUT Test configuration bit - connect to VDD for normal operation
EEPROM interface(1)
63 EEPROM_SDA BIDIR Serial data to/from the EEPROM or slave I2C cl ock
64 EEPROM_SCL BIDIR Serial clock to the EEPROM or slave I2C clock
1. The I2C pins EEPROM _SCL and EEPR OM_S DA can be reconfigured to act as a low speed I2C slave device that allows
the user to directly control the internal register space of the VP and VC modules.
Table 9. STV0676 pin description (continued)
Pin Signal Type Description
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
Detailed specifications STV0676
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5 Detailed specifications
5.1 STV0676 absolute maximum ratings
5.2 STV0676 AC/DC characteristics
Table 10. Absolute maximum ratings
Description Range Unit
Operating temperature 0 to 70 oC
Storage temperature -50 to 150 oC
Table 11. AC/DC characteristics
Parameter Description Min Typ Max Units
VDD_COR E Primary STV0676 power su ppl y 1.55 1.8 1.95 V
VDD_IO 3.3V power supply for on-chip USB transceiver and IO 3.0 3.3 3.6 V
VDD_PLL Analog supply to the PLL 1.60 1.8 2.0 V
I_coresuspend Current consumption in suspend mode 3 µA
I_corestandby Current consumption in standby mode 9.6 mA
I_coreactive Current consumption while active, VGA 30fps 52 mA
I_IOsuspend Current consumption in suspend mode 40 µA
I_IOstandby Current consumption in standby mode 540 µA
I_IOactive Current consumption while active, VGA 30fps 6.6 mA
I_PLLsuspend Current consumption in suspend mode 0.4 µA
I_PLLstandby Current consumption in standby mode 476 µA
I_PLLactive Current consumption while active, VGA 30fps 476 µA
VIl CMOS input low voltage (XTAL_IN) 0.687 V
VIH CMOS input high voltage (XTAL_IN) 1.19 V
VHYS Hysteresis (XTAL_IN) 0.51 V
VIl CMOS input low voltage 0.35VD
DV
VIH CMOS input high voltage 0.65VD
DV
VT+ CMOS schmitt input low to high threshold voltage 2.15 V
VT- CMOS schmitt input high to low threshold voltage 1.05 V
VTThreshold point 1.65 V
VOH Output high voltage 2.4 V
VOL Output low voltage 0.4 V
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
STV0676 Package mechanical data
19/22
6 Package mechanical data
Dim.
mm inch
Min Typ Max Min Typ Max
A 1.60 0.063
A1 0.05 0.15 0.002 0.006
A2 1.35 1.40 1.45 0.053 0.055 0.057
B 0.18 0.23 0.28 0.007 0.009 0.011
C 0.12 0.16 0.20 0.0047 0.0063 0.0079
D 12.00 0.472
D1 10.00 0.394
D3 7.50 0.295
e 0.50 0.0197
E 12.00 0.472
E3 7.50 0.295
L 0.40 0.60 0.75 0.0157 0.0236 0.0295
L1 1.00 0.0393
K 0°C (min.), 7°C (max.)
Weight: 0.30 gr
Body: 10x10x1.40mm
TQFP64
®
OUTLINE AND
MECHANICAL DATA
A
A2
A1
B
C
16
17
32
3348
49
64
E3
D3
E1
E
D1
D
e
1
K
B
TQFP64
L
L1
Seating Plane
0.10mm
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
Reference design and evaluation kits STV0676
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7 Reference design and evaluation kits
STMicroelectronics supply a full range of supporting reference design kits for their range of
sensors and coprocessors.
Please refer to the STMicroelectronics website for the up-to-date list of available reference
designs and evaluation kits.
8 Design issues
There are no restrictions on the positioning of the STV0676 coprocessor with respect to the
sensor.
An EEPROM is required for full USB 1.1 compliance, see reference design manual for
details.
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STV0676 Revision history
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9 Revision history
Table 12. Document revision history
Date Revision Changes
13-Aug-2002 1Initial release.
10-Apr-2006 2Format update
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STV0676
22/22
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