TNETV1644ZDU6 datasheet(223/306 Pages) TI1

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TMS320DM6437

Digital Media Processor

www.ti.com

SPRS345D – NOVEMBER 2006 – REVISED JUNE 2008

–

Support for a ping-pong buffer scheme that can be used for VIDWIN0 (allows for video data to be

accessed from two different locations in DDR2)

–

Each OSD window (either one, but not both at the same time) is capable of reading in RGB data

(16-bit data with six bits for the green and five bits each for the red and blue colors) instead of

bitmap data in YCbCr format restricted to a maximum of 8-bits

–

The OSD bitmap data width is selectable between 1, 2, 4, or 8-bits.

–

Each OSD window supports 16 entries for the bitmap (to index into a 256 entry RAM/ROM CLUT

table).

–

Indirect support for 24-bit RGB input data (which will be transformed into 16-bit YCbCr video

window data) via the wrapper interface in the VPBE.

• Support for a rectangular cursor window and a programmable background color selection.

–

Programmable color palette with the ability to select between a RAM/ROM table with support for

256 colors.

–

The width, height, and color of the cursor is programmable.

–

The display priority is: Rectangular-Cursor > OSDWIN1 > OSDWIN0 > VIDWIN1 > VIDWIN0 >

background color

• Support for attenuation of the YCbCr values for the REC601 standard.

The following restrictions exist in the OSD module.

• Both the OSD windows and VIDWIN1 should be fully contained inside VIDWIN0.

• When one of the OSD windows is set in RGB mode, it cannot overlap with VIDWIN1.

• The OSD cannot support more than 256 color entries in the CLUT RAM/ROM. Some applications

require higher number of entries, and one workaround is to use VIDWIN1 as an overlay mimicking the

OSD window. Another option is to use the RGB mode for one of the OSD windows which allows for a

total of 16-bits for the R, G, and B colors (64K colors).

• The OSD can only read YCbCr in 4:2:2 interleaved format for the video windows. Other formats, either

color separate storage or 4:4:4/4:2:0 interleaved data is not supported.

• If the vertical resize filter is enabled for either of the video windows, the maximum horizontal window

dimension cannot be greater than 720 currently.

• It is not possible to use both of the CLUT ROMs at the same time. However, one window can use

RAM while another uses ROM.

• The 24-bit RGB input mode is only valid for one of the two video windows (programmable) and does

not apply to the OSD windows.

The OSD register memory mapping is shown in Table 6-40.

Table 6-40. OSD Register Descriptions

Address

Description

0x01C7 2600

MODE

OSD Mode Register

0x01C7 2604

VIDWINMD

Video Window Mode Setup

0x01C7 2608

OSDWIN0MD

OSD Window Mode Setup

0x01C7 260C

OSDWIN1MD

OSD Window 1 Mode Setup (when used as a second OSD window)

0x01C7 260C

OSDATRMD

OSD Attribute Window Mode Setup (when used as an attribute window)

0x01C7 2610

RECTCUR

Rectangular Cursor Setup

0x01C7 2614

RSV0

Reserved

0x01C7 2618

VIDWIN0OFST

Video Window 0 Offset

0x01C7 261C

VIDWIN1OFST

Video Window 1 Offset

0x01C7 2620

OSDWIN0OFST

OSD Window 0 Offset

0x01C7 2624

OSDWIN1OFST

OSD Window 1 Offset

0x01C7 2628

RSV1

Reserved

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