TNETV6446AINZWT datasheet(168/227 Pages) TI1

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PCLK

(Negative Edge Clocking)

C_FIELD

PCLK

(Positive Edge Clocking)

TMS320DM6446

SPRS283H – DECEMBER 2005 – REVISED SEPTEMBER 2010

www.ti.com

Table 6-56. Switching Characteristics Over Recommended Operating Conditions for VPFE (CCD) Master

Mode(1) (see Figure 6-49)

A-513,

-594,

NO.

PARAMETER

UNIT

-810

MIN

MAX

td(PCLK-HDV)

Delay time, PCLK edge to HD valid

0.5

td(PCLK-VDV)

Delay time, PCLK edge to VD valid

0.5

td(PCLK-C_FIELDV)

Delay time, PCLK edge to C_FIELD valid

0.5

8.3

(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.

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

Description

0x01C7 2780

PID

Peripheral Revision and Class Information Register

0x01C7 2784

PCR

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

168

Peripheral and Electrical Specifications

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