SPT2210SCT 查看數據表（PDF） - Signal Processing Technologies

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SPT2210SCT

Y/C VIDEO ENCODER

Signal Processing Technologies 

GENERAL DESCRIPTION OF FUNCTIONS

VIDEO MODES

The SPT2210 supports NTSC and PAL video standards

in Y/C (4:2:2) and Y/C (4:1:1) input formats. Table I shows

the video modes supported.

Table I – Supported Video Modes

Video Mode

Active Number

of Pixels

NTSC Square Pixel

Y/C (4:2:2/4:1:1)

NTSC CCIR 601

Y/C (4:2:2/4:1:1)

NTSC 4Fsc

Y/C (4:2:2/4:1:1)

PAL Square Pixel

Y/C (4:2:2/4:1:1)

PAL Square Pixel

Y/C (4:2:2/4:1:1)

PAL CCIR 601

Y/C (4:2:2/4:1:1)

PAL 4Fsc

Y/C (4:2:2/4:1:1)

640 x 483

720 x 483

768 x 483

640 x 573

768 x 573

720 x 573

948 x 573

Input Clock

Frequency

12.2727 MHz

13.5000 MHz

14.3182 MHz

12.1875 MHz

14.7500 MHz

13.5000 MHz

17.7345 MHz

VERTICAL INTERPOLATION

The SPT2210 has a vertical interpolation filter that is

used to reduce jaggy noise and flicker. It also supports

the high-resolution mode for Video CD, version 2.0.

TWO-CHANNEL D/A CONVERTER OUTPUT

Digital video signals are output on two 8-bit D/A convert-

ers. Y/C (S-Video) output or composite video output can

be selected. The Y/C video outputs are current sources,

capable of driving a 75 Ω load to 1 VP-P, referenced to

ground. If both composite and S-Video are required si-

multaneously, a simple circuit (using the SPT9400 video

driver) may be added.

FOUR-BIT TITLE/GRAPHICS

MULTIPLEXING FUNCTION

Graphics from a 16-entry color lookup table can be arbi-

trarily displayed. In chroma mode it is possible to super-

impose graphics and video input by specifying transpar-

ent colors. In the external key mode it is possible to

display graphics in the areas specified pixel by pixel.

HOST INTERFACE

The operational modes and parameters of the SPT2210

can be changed via a MPU host parallel interface. The

following parameters can be changed:

• Low-pass filter

• Switching between Y/C output and composite output

• Switching between two’s complement or offset binary

data format

• Selecting between seven video modes

• 50%, Y, Y/C and color enable/disable

• Color bar test pattern

• Color kill (monochrome only out)

• Graphics mode control

• Software reset

• Select Y/C 4:2:2 or 4:1:1 input format

• Change of the Cr/Cb sampling order

• Interpolation field changeover

• Vertical interpolation filter bypass

• Free run or reset of subcarrier phase

• Turn off/on NTSC setup

• Suspend mode

• Input logic polarity set

• V Blank_ timing adjust

• H Blank_ timing adjust

EXTERNAL SETTING PINS

In addition to host interface control, the SPT2210 can be

operated independent of host interface using external pin

control. The external pin controls available are listed

below:

• Select between seven video modes

• Sync/Blank I/O mode

• Output of the built-in color bars

• Free run or reset of subcarrier phase

• Switching between Y/C output and composite output

• Turn off/on NTSC setup

See the External Setting Pin Descriptions section for

operation.

SPT

SPT2210

2

8/22/00

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