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EM2860 Schematic ( PDF Datasheet ) - EMPIA

Teilenummer EM2860
Beschreibung USB Video Capture Device
Hersteller EMPIA
Logo EMPIA Logo 




Gesamt 19 Seiten
EM2860 Datasheet, Funktion
eMPIA Technology
EM2860
USB Video Capture Device
EM2860 Supports Video Decoder, Audio Decoder, and VBI
Hardware Specification
EMPIA Technology
8/18/2004






EM2860 Datasheet, Funktion
EM2860 Hardware Specification
General Description
EM2860 USB Video Capture Device (UVCD) is a highly integrated VLSI that provides a cost-effective solution
for video capture applications on USB 2.0. Typical applications of this device are:
CMOS PC-Camera
NTSC/PAL Video Capture
As illustrated in the functional block diagram, an USB video subsystem consists of the UVCD, a video source,
and optionally an audio source. The video source can be a CMOS sensor or an NTSC/PAL video decoder. The
audio source can be an AC97 codec or an I2S stereo decoder. The USB host configures (programs) the
video/audio source via the 2-wire serial bus or the AC97-link. Source video stream is transferred to the UVCD
via the 8-bit video bus. Source audio stream is transferred to the UVCD via the AC97-link or the I2S bus.
As shown in the functional block diagram, the UVCD consists of 7 main blocks.
Video Interface
Video Pipeline
Audio Interface
Stream Buffer
Serial Interface Engine
USB 2.0 PHY
2-Wire Serial Interface
Video Interface
The Video Interface Block receives video data from external video source. Video clock (VCLK) and reference
signals (VREF, HREF) from the video source are used to strobe incoming video data. CCIR-656 with embedded
FID, VREF and HREF is also supported.
From the incoming video, a rectangular video sub-block is selected for feeding the next block, Video Pipeline.
The Video Interface Block also includes a video timing generator that generates HREF and VREF for slave-
mode CMOS sensor.
Video Pipeline
The Video Pipeline Block performs the following operations.
Black Clamping
Gamma Correction
RGB Gain and Offset
Defect Pixel Compensation
Up-Sampling 8-bit Bayer to 24-bit RGB,
Color Space Conversion to YUV,
Pixel Accumulation for AE and AWB
Down Scaling
Sharpness Enhancement
Contrast, Brightness, and Saturation Adjustments
UV Offset Adjustments
Output Formatting
EMPIA Technology
6
8/18/2004

6 Page









EM2860 pdf, datenblatt
EM2860 Hardware Specification
0AH
0BH
0CH
0DH
0EH
0FH
10H
11H
12H
24H
25H
Board Configuration Low Byte
To be defined by Software Architect
Board Configuration High Byte
To be defined by Software Architect
String 1 Descriptor Pointer
Starting address of String 1 Descriptor in the EEPROM
String 1 Descriptor Length
Number of bytes of String 1 Descriptor in the EEPROM
String 2 Descriptor Pointer
Starting address of String 2 Descriptor in the EEPROM
String 2 Descriptor Length
Number of bytes of String 2 Descriptor in the EEPROM
String 3 Descriptor Pointer
Starting address of String 3 Descriptor in the EEPROM
String 3 Descriptor Length
Number of bytes of String 3 Descriptor in the EEPROM
String Index Table
D[7:6] Reserved. Set to 0.
D[5:4] Serial Number String Descriptor Index
D[3:2] Product String Descriptor Index
D[1:0] Vendor String Descriptor Index
Minimum Audio Volume (2’s complement number)
This is audio class minimum audio volume to report to the host so that the host will not
set any volume smaller than this.
Maximum Audio Volume (2’s complement number)
This is audio class maximum audio volume to report to the host so that the host will not
set any volume bigger than this.
00H
00H
00H
00H
00H
00H
00H
00H
00H
F0H
10H
Note:
* Default Product ID is listed below:
Chip Type
EM2860
Product ID Product ID
(w.o. audio) (w. audio)
2860H
2861H
** Default Chip Configuration Low Byte = 00H if PIO7 is pulled down with a resistor.
Default Chip Configuration Low Byte = 10H if PIO7 is pulled up with a resistor.
EMPIA Technology
12
8/18/2004

12 Page





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