STV2246 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STV2246

I²C bus-controlled multistandard single chip TV processor

STMicroelectronics 

STV224X, STV228X, STV223X - I²C BUS SELECTION

Reg.

Addr

(Hex)

Description

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

0F Peaking Control 4 X X X X 0 0 0 0 0 dB at center Freq. Min. peaking.

X X X X 1 1 1 1 + 6dB at center Freq.Max. peaking.

Coring on sharp-

ness

1 X X X 0 X X X X 0 = Coring off.

X X X 1 X X X X 1 = Coring on.

Chroma Trap and

Luma Delay Selec-

1

tion

X X 0 X X X X X 0 = Trap and Luma Delay Enabled.

X X 1 X X X X X 1 = Trap and Luma Delay Disabled.

CVBS2 ON/OFF

1 X 0 X X X X X X 0 = CVBS2 output Enabled.

X 1 X X X X X X 1 = CVBS2 output Disabled.

White Insertion

1 0 X X X X X X X 0 = White insertion not active.

1 X X X X X X X 1 = White insertion enable during HOUT soft mode.

t(s) 10 APR Enable

0 = APR disable.

1 X X X X X X X 0 1 = APR enable.

X X X X X X X 1 Note: WR10 d0 to be set to 1 when RGB peak limi-

tation is used

c APR Threshold

4 X X X 0 0 0 0 X 50 IRE.

X X X 1 1 1 1 X 100 IRE.

u RGB OSD Con-

d trast Selection

1 X X 0 X X X X X 0 = Contrast control disable.

X X 1 X X X X X 1 = Contrast control enable.

ro CRT/LCD Display 1 X 0 X X X X X X 0 = RGB output blanking active, CRT Display

X 1 X X X X X X 1 = RGB output blanking replaced by black level,

P LCD Display

te White Insertion

1 0 X X X X X X X White Insertion controlled by WR0Fd7

1 X X X X X X X White forced at RGB Output

le 6.3.7 Chroma Controls

so Reg.

Data

b Addr.

(Hex)

Description

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

- O 11 Bell Filter Adjust

5 X X X 0 0 0 0 0 0 kHz.

X X X 1 1 1 1 1 +100 kHz.

) PAL/NTSC

1 X X 0 X X X X X 0 = 0 dB gain (nominal).

t(s Demodulation Gain

X X 1 X X X X X 1 = +6 dB gain.

c NTSC Matrix

1

X 0 X X X X X X 0 = 90° matrix selection.

X 1 X X X X X X 1 = 104° matrix selection (in NTSC only).

du ACC Overload Disable 1

0 X X X X X X X 0 = ACC overload active.

1 X X X X X X X 1 = ACC overload disable.

ro 12 Bandpass adjust

4 X X X X 0 0 0 0 f = fosc.

X X X X 1 1 1 1 f = 1.1*fosc.

P Chroma reference out- 1 X X X 0 X X X X 0 = Chroma reference output OFF.

put

X X X 1 X X X X 1 = Chroma reference output ON.

leteChroma DL selection

1 X X 0 X X X X X 0 = ON.

X X 1 X X X X X 1 = OFF.

bso Not to be used

2 0 0XXXXXX

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