
camisp-038
Fault pixel
correction
Optical clamp
Black level
compensation
Data formatter
and video port
Video port
interface
(H3A)
Output
formatter
Low pass
filter
Culling
A-law
compression
DATA [15:0]
Central resource
shared buffer logic
CCDC
Initial processing
WEN
PCLK
SYNC CTRL
FIELD
HS
VS
SYNC
SYNC
LSC
Central resource
shared buffer logic
Video port
interface
(Preview,HIST)
Input sampling
and formatting
Public Version
Camera ISP Functional Description
www.ti.com
Figure 6-78. Camera ISP CCDC Block Diagram
The data flow through the module differs, depending on whether the input is RAW data or YUV data. It
also depends on the application scenario. See
for ISP and CCDC allowed data flows.
For RAW8/10 data (
[13:12] INPMODE = 0 &&
[0] REC656ON =
0), the following functions apply:
•
Video-preview and video-capture data flows can pass through the optical-clamp, black-level
compensation, faulty-pixel correction, lens-shading compensator, and data-reformatter submodules.
Output is transmitted to the computing statistics (H3A, histogram) modules for further processing.
•
JPEG still image capture data is not processed by the internal CCDC modules. The data flow is sent to
memory through the SBL, Circular buffer, and MMU to be read by the external JPEG CODEC.
•
RAW still-image-capture data flow typically passes through the optical clamp, black-level
compensation, faulty-pixel correction, lens-shading compensator and output-formatter submodules.
For YUV data (
[13:12] INPMODE = 1 or 2 &&
[0] REC656ON = 1),
the following functions apply:
•
Data can be written to memory directly through the central-resource SBL module or sent to the Resizer
module for upscaling or downscaling.
6.4.6.1.3 Camera ISP CCDC Functional Operations
6.4.6.1.3.1 Camera ISP CCDC SYNC CTRL Module
The SYNC CTRL module receives the pixel-clock signal from the image sensor (PCLK). The module can
be slave or master of the horizontal and vertical synchronization signals (HS and VS) and of the
field-identification signal (FIELD).
1194
Camera Image Signal Processor
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated