TMS320DM6446_07 Datasheet, PDF (170/231 Pages) Texas Instruments – Digital Media System-on-Chip

TMS320DM6446
Digital Media System-on-Chip
SPRS283E – DECEMBER 2005 – REVISED MARCH 2007
www.ti.com
Table 6-56. Switching Characteristics Over Recommended Operating Conditions for VPFE (CCD) Master
Mode⁽¹⁾ (see Figure 6-49)
NO.
PARAMETER
-594
MIN
UNIT
MAX
18
t_d(PCLK-HDV)
Delay time, PCLK edge to HD valid
20
t_d(PCLK-VDV)
Delay time, PCLK edge to VD valid
22 t_{d(PCLK-C_FIELDV)} Delay time, PCLK edge to C_FIELD valid
0.5
8 ns
0.5
8 ns
0.5
8.3 ns
(1) The VPFE may be configured to operate in either positive or negative edge clocking mode. When in positive edge clocking mode the
rising edge of PCLK is referenced. When in negative edge clocking mode the falling edge of PCLK is referenced.
PCLK
(Positive Edge Clocking)
PCLK
(Negative Edge Clocking)
18
HD
20
VD
22
C_FIELD
Figure 6-49. VPFE (CCD) Master Mode Control Output Data Timing
6.13.2 Video Processing Back-End (VPBE)
The Video Processing Back-End (VPBE) consists of the On-Screen Display (OSD) module, the Video
Encoder (VENC) including the Digital LCD (DLCD) and Analog (i.e., DAC) interfaces. The video encoder
generates analog video output. The DLCD controller generates digital RGB/YCbCr data output and timing
signals.
The VPBE register memory mapping is shown in Table 6-57.
Table 6-57. VPBE Register Descriptions
Address
0x01C7 2780
0x01C7 2784
Register
PID
PCR
Description
Peripheral Revision and Class Information Register
Peripheral Control Register
6.13.2.1 On-Screen Display (OSD)
The major function of the OSD module is to gather and blend video data and display/bitmap data before
feeding it to the Video Encoder (VENC) in YCbCr format. The video and display data is read from an
external memory, typically DDR2. The OSD is programmed via control and parameter registers. The
following are the primary features that are supported by the OSD.
• Simultaneous display of two video windows and two OSD windows (VIDWIN0/VIDWIN1 and
OSDWIN0/OSDWIN1).
– Separate enable 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
– OSDWIN1 can be used as an attribute window for OSDWIN0
170 Peripheral and Electrical Specifications
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