STV2247H 查看數據表（PDF） - STMicroelectronics

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STV2247H

I2C BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR

STMicroelectronics 

STV224XH/228XH/223XH - I²C BUS SELECTION

6.3 INPUT SIGNALS (WRITE MODE)

Not used data bits must be set to “0”.

6.3.1 PIFVCO Free Running

Reg.

Addr.

(Hex)

Description

00 PIFVCO

Free Running

Fine Adjustment

Not to be used

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

7 0 0 0 0 0 0 0 X PIF Typical + 0.7 MHz.

1 0 0 0 0 0 0 X PIF Free Running mid range.

1 1 1 1 1 1 1 X PIF Typical - 0.7 MHz.

1 XXXXXXX 0

6.3.2 PIF Free Running Coarse

Reg.

Addr.

Description

(Hex)

01 PIFVCO Free

Running Coarse

Adjustment for

38.9 MHz Carrier

PIFVCO Free

Running Coarse

Adjustment for

33.9 MHz Carrier

(L’)

PIF Modulation

L/L’ Standard

Selection

Digital AFC Defeat

PIF

Over-modulation

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

X X 0 X 0 0 0 0 PIFVCO = F0 + 2.0 MHz.

4 X X 0 X 0 1 1 1 PIFVCO = F0 (mid range).

X X 0 X 1 1 1 1 PIFVCO = F0 - 1.8 MHz.

X X 1 1 0 0 0 0 PIFVCO = F0 + 1.3 MHz.

4 X X 1 1 0 1 1 1 PIFVCO = F0 (mid range).

X X 1 1 1 1 1 1 PIFVCO = F0 - 1.2 MHz.

1 X X X 0 X X X X 0 = Negative Modulation.

X X X 1 X X X X 1 = Positive Modulation.

1 X X 0 1 X X X X 0 = L Standard.

X X 1 1 X X X X 1 = L’ Standard.

1 X 0 X X X X X X 0 = AFC Active.

X 1 X X X X X X 1 = AFC Defeat (read register 02, d2 d1 d0 = 000).

1 0 X X X X X X X 0 = Over-modulation detection off.

1 X X X X X X X 1 = Over-modulation regulation active.

6.3.3 PIF Features

Reg.

Addr.

(Hex)

Description

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

02

CVBS Output Ampli- 5

tude

X X X 0 0 0 0 0 VTyp. - 1.6 dB.

X X X 1 0 0 0 0 VTyp. = 1.6 V (black / white).

X X X 1 1 1 1 1 VTyp.+ 1.5 dB.

Not to be used

1 XX0XXXXX

Overmodulation

Reset

1 X 0 X X X X X X 0 = Normal Operating Mode

X 1 X X X X X X 1 = Overmodulation Reset

CVBS Output

1 0 X X X X X X X 0 = 2 VPP, no external sound trap.

1 X X X X X X X 1 = 2.3 VPP, external sound trap.

47/86

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