STV2246 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STV2246

I²C bus-controlled multistandard single chip TV processor

STMicroelectronics 

STV224X, STV228X, STV223X - MAIN FEATURES

2 MAIN FEATURES

■ I²C Bus control (Read and Write modes).

■ Integrated luminance delay line.

■ PLL PIF demodulator, bus-controlled VCO

alignment.

■ Adjustable peaking on the luminance signal with

coring function.

■ Positive and negative IF modulation.

■ Black Stretch circuit.

■ Digital AFC.

■ Automatic RGB peak regulation (APR) or RGB

■ Tuner-delayed AGC output.

peak limitation.

■ White and Black Spot cancellation.

■ PAL/SECAM/NTSC color decoder with

■ SIF with QSS structure.

automatic identification of standards.

■ Intercarrier capability.

■ Integrated chroma delay line.

■ Built-in sound bandpass.

■ Full integrated SECAM decoder.

■ Multistandard PLL FM Demodulator (4.5, 5.5,

6.0, 6.5 MHz).

) ■ Audio FM Wide mode (BGDKI): Capable of

t(s demodulating ±400 kHz overmodulated audio

signals, to be used in QSS architecture.

c ■ AM demodulator for France.

u ■ Sound subcarrier output for Stereo chassis: FM

d and NICAM carriers.

ro ■ Audio switch for external audio input, Mono

chassis.

P ■ Digital volume control.

te ■ Audio Mute.

■ Automatic Volume Levelling (AVL) on audio

le signal (internal or external audio).

o ■ Digital buffer for SAW filter switching.

s ■ Video switch, three Composite Video

b Broadcasting Signal (CVBS) inputs and two

CVBS outputs (which can be used to drive a

O teletext decoder).

- ■ SVHS switch, Y input is combined with CVBS3

) input.

t(s ■ Capability to output Y+C signal on second

CVBS output.

c ■ OSD RGB analog inputs, fast blanking

u detection on fast blanking OSD pin, contrast

d control capability.

ro ■ Half-contrast control pin.

P ■ External analog RGB inputs with contrast and

saturation control (external RGB matrixed in

te YUV). External analog YCrCb inputs can be

connected to the same inputs. In this case, the

lesync signal must be sent to the CVBS input, and

o External YCrCb mode must be selected through

s the I²C bus.

b ■ Y,U,V inputs outputs: Y,U,V inputs/outputs for

■ Hue control, 2 selectable matrices in NTSC

mode.

■ Automatic Flesh Control circuit with two

selectable characteristics (normal and wide).

■ Automatic Color Control (ACC) overload circuit.

■ Chroma subcarrier output which could be used

to drive a comb filter circuit.

■ Automatic digital cut-off current loop with warm-

up detection circuit.

■ White point (drive) and cut-off point

adjustments.

■ Manual cut-off capability.

■ Beam current limiter control stage.

■ High-performance sync pulse separator.

■ Horizontal synchronization with two phase-

locked loops.

■ Integrated VCO, auto-calibration using the

chroma crystal reference frequency.

■ Automatic time constant selection for the first

PLL, three selectable time constants.

■ Video identification circuit (independent from

PLL1).

■ Noise detector circuit.

■ Vertical countdown circuit.

■ Automatic 50/60 Hz selection circuit.

■ Blanking and inserted cut-off pulses position

adapted to standard (50 or 60 Hz).

■ Long blanking mode capability in 60 Hz (same

blanking as with 50 Hz standard).

■ De-interlace capability.

■ Horizontal starting circuit with soft-start

capability.

■ Horizontal and vertical position adjustments,

vertical amplitude control voltage (combined

the use of enhanced picture ICs.

with chroma subcarrier output).

■ Integrated chroma filters (trap, bandpass, bell)

with automatic alignment.

■ Oversize Blanking capability on OSD Fast

Blanking input.

19/86

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