STV2216 datasheet(5/26 Pages) STMICROELECTRONICS

5 / 26 page

FUNCTIONAL DESCRIPTION (continued)

4 - CHROMA CIRCUIT

4.1 - PAL/NTSC Decoders

- SVHS inputs ; bus controlled SVHS mode.

- 30dB range ACC

- Use of an external base band delay line

(STV2180 recommended)

- Automatic standard identification, with possibility

to force the standard through the bus.

- ACC done by peak detector on synchronous de-

modulation of the burst

- ACC overload.

- Fully integrated killer functions.

- VCO using two standard crystals : 4.43MHz and

3.58MHz. One crystal is internally selected de-

pending on the standard selection.

- 3 crystals application capability : one crystal on

Pin XTAL1 (4.43MHz or 3.58MHz), two crystals

on Pin XTAL 2 (3.58MHz only) which can be

selected by Pin 9 out signal.

XTAL SPECIFICATION :

Frequency

Motional Capacity

4.433619MHz (PAL)

3.579545MHz (NTSC M)

3.575611MHz (PAL M)

3.582056MHz (PAL N)

13fF

± 3fF

11fF

± 3fF

9fF

± 1fF

10fF

± 2fF

Vibration mode : Fondamental,series resonance

(no serial capacitor)

Resonance resistance : < 70

Ω

Shunt capacitance : < 7pF

Spurious response : No resonance at 3*fo

±3kHz

-0

o and

±90o demodulation angles for PAL

-(0

o,90o)or (0o,104o) = demodulation angles for

NTSC. The selection of 90

o or 104o is made

through the bus.

- Bus control Hue adjustment in NTSC mode.

- NTSC Automatic Flesh control. Bus controlled

disable. Two automatic flesh control charac-

teristics : the first one with

±20o correction and a

total action range of

±90o, the second one with

±12o maximumcorrectionand a totalactionrange

±60o. The selection of the flesh characteristic

is bus controlled.

- Switchable Chroma demodulator gain (+6dB) for

NTSC only application, when no external chroma

delay line is used.

4.2 - Standard Identification

- 3 identification sequences : XTAL1 (crystal on

Pin 3), XTAL2-1 (first crystal on Pin 2), XTAL2-2

(second crystal on Pin 2). Parallel identificationof

PAL and NTSC.

- Blanking of the (R-Y) and B-Y) outputs during

color search mode.

5 - OTHER FUNCTIONS : IF CONTROLS

5.1 - Volume Control and Mute

The volume control voltage range on Pin 10 is from

0.5V to 5V. A low voltage on Pin 10 (below 0.1V)

will put the volume to minimum and mute the FM

demodulatorof the IF circuit (STV8223).Thus there

will be no sound either on the speaker or an audio

output plug.

The volume control voltage and the mute level are

controlled by the bus.

5.2 - TV/External Mode Selection

The selection of theTV/External (AV) mode is con-

trolled by the bus. The selection is converted in two

voltages on Pin 11.

The lowest voltage selects the TV mode.

The highest voltage (open collector output with

internal pull-up resistor to VCC) selects the Exter-

nal (AV) mode.

STV2216

5/26

STV2216 数据表(PDF) 5 Page - STMicroelectronics

STV2216 数据表(HTML) 5 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

数据表下载