Texas Instruments TMS320DM355 Manual Do Utilizador
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PRODUCT PREVIEW
PCLK
(Positive Edge Clocking)
18
20
HD
VD
PCLK
(Negative Edge Clocking)
5.9.2
Video Processing Back-End (VPBE)
TMS320DM355
Digital Media System-on-Chip (DMSoC)
Digital Media System-on-Chip (DMSoC)
SPRS463A – SEPTEMBER 2007 – REVISED SEPTEMBER 2007
Table 5-20. Switching Characteristics Over Recommended Operating Conditions for VPFE (CCD) Master
Mode (see
DM355
NO.
PARAMETER
UNIT
MIN
MAX
18
t
d(PCLKL-HDIV)
Delay time, PCLK edge to HD invalid
3
11
ns
20
t
d(PCLKL-VDIV)
Delay time, PCLK edge to VD invalid
3
11
ns
Figure 5-26. VPFE (CCD) Master Mode Control Output Data Timing
The Video Processing Back-End of VPBE module is comprised of the On Screen Display (OSD) module
and the Video Encoder / Digital LCD Controller (VENC/DLCD).
and the Video Encoder / Digital LCD Controller (VENC/DLCD).
5.9.2.1 On-Screen Display (OSD)
The primary function of the OSD module is to gather and blend video data and display/bitmap data and
then pass it to the Video Encoder (VENC) in YCbCr format. The video and display data is read from
external DDR2/mDDR memory. The OSD is programmed via control and parameter registers. The
following are the primary features that are supported by the OSD.
then pass it to the Video Encoder (VENC) in YCbCr format. The video and display data is read from
external DDR2/mDDR memory. The OSD is programmed via control and parameter registers. The
following are the primary features that are supported by the OSD.
•
Support for two video windows and two OSD bitmapped windows that can be displayed simultaneously
(VIDWIN0/VIDWIN1 and OSDWIN0/OSDWIN1).
(VIDWIN0/VIDWIN1 and OSDWIN0/OSDWIN1).
•
Video windows supports YCbCr data in 422 format from external memory, with the ability to
interchange the order of the CbCr component in the 32-bit word
interchange the order of the CbCr component in the 32-bit word
•
OSD bitmap windows support 1/2/4/8 bit width index data of color palette
•
In addition one OSD bitmap window at a time can be configured to one of the following:
–
–
YUV422 (same as video data)
–
RGB format data in 16-bit mode (R=5bit, G=6bit, B=5bit)
–
24-bit mode (each R/G/B=8bit) with pixel level blending with video windows
•
Programmable color palette with the ability to select between a RAM/ROM table with support for 256
colors.
colors.
•
Support for 2 ROM tables, one of which can be selected at a given time
•
Separate enable/disable control for each window
•
Programmable width, height, and base starting coordinates for each window
•
External memory address and offset registers for each window
•
Support for x2 and x4 zoom in both the horizontal and vertical direction
•
Pixel-level blending/transparency/blinking attributes can be defined for OSDWIN0 when OSDWIN1 is
configured as an attribute window for OSDWIN0.
configured as an attribute window for OSDWIN0.
•
Support for blinking intervals to the attribute window
•
Ability to select either field/frame mode for the windows (interlaced/progressive)
•
An eight step blending process between the bitmap and video windows
•
Transparency support for the bitmap and video data (when a bitmap pixel is zero, there will be no
Peripheral Information and Electrical Specifications
120