STV-974/552S-R01 STMicroelectronics, STV-974/552S-R01 Datasheet - Page 7

• Manufacturer Part Number: STV-974/552S-R01
• Description: KIT DEMO W/VS6552
• Manufacturer: STMicroelectronics

Specifications of STV-974/552S-R01

• Sensor Type: CMOS Imaging, Color (RGB)
• Sensing Range: VGA
• Interface: I²C
• Sensitivity: 30 fps
• Embedded: No
• Utilized Ic / Part: STV0974E, VS6552
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3891

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Functional description
Functional description
Overview
The processor includes a chain of dedicated video data processing blocks controlled by a
microprocessor. The processing blocks perform the main video pipe processing while the
microprocessor manages the interactions between the sensor, the functional blocks and the host.
The host controls and monitors the STV0974 via a set of read/write registers accessible via the I
interface for the streaming video mode and via the asychronous microprocessor interface for the
microprocessor mode.
In video mode, the processor streams video data in a format which closely follows the data format
specified in the ITU-R656 standard.
In microprocessor mode, the video data is stored in a small FIFO before is it pulled out of the
asynchronous microprocessor interface by the host system (with DMA support).
Video pipe block description
Please refer to the block diagram (
Sensor interface This block decodes the incoming serial data stream from the sensor (raw bayer
data) and converts it into a parallel form for the processing chain.
Video processor The video processor converts the raw bayer data from the sensor to RGB or
YUV processed data by applying a number of filters to the data then scaling and converting the
data into either one of the RGB modes or into YUV mode.
Video JPEG compressor The video compressor converts the processed data from the video
processor and converts the data into JPEG format. The compression ratio applied to the image can
be controlled by the microprocessor.
Streaming video output port In streaming video mode the data from either the video processor
or the video compressor is enclosed in a format which closely follows the data format specified in
the ITU-R656 standard.
Microprocessor interface In microprocessor interface mode, the data from the video processor or
video compressor is stored in a FIFO. The interface informs the system via an IRQ or a DRQ that
the FIFO is filling up. The system then has to pull some of the data from the STV0974 via the
microprocessor interface.
Figure 1
).
STV0974
2
C