Uart Camera Module with Jpeg compression - C328

● Small in size,  low cost and low  powered  (3.3V) camera module for  high-resolution serial bus security system or PDA accessory applications.
● On-board EEPROM provides a command-based interface to external host via RS-232.
●  UART: 115.2Kbps for transferring JPEG still pictures or 160x128 preview @8bpp with 0.75fps.
●  On board OmniVision  VGA color sensor.
●  Built-in JPEG CODEC for different resolutions.
●  Built-in down sampling, clamping and windowing circuits for VGA, QVGA, 160x120 or 80x60 image resolutions.
●  Built-in color conversion circuits for 2-bit gray, 4-bir gray, 8-bit gray, 12-bit RGB, 16-bit RGB or standard JPEG preview images.
●  No external DRAM required.
 
System Configuration
1. Camera Sensor
The C328 module uses OmniVision  VGA color digital CameraChips with an 8-bit YCbCr interface.
 
2. OV528 Serial Bridge
The OV528 Serial Bridge is a JPEG CODEC embedded controller chip that can compress and transfer image data from CameraChips to  external device. The OV528 takes 8-bit YCbCr 422 progressive video data from an Sensor CameraChip. The camera interface synchronizes with input video data and performs down sampling, clamping and windowing functions with desired resolution, as  well as color  conversion that is  requested by the  user through serial  bus  host
commands.
The JPEG CODEC can achieve higher compression ratio and better image quality for  various
image resolutions.
 
3. Program EEPROM
A serial type program  memory is built-in  for  C328 to provide a set of user-friendly command interfacing to external host.

Documents

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