STV6411 데이터 시트보기 (PDF) - STMicroelectronics

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STV6411

AUDIO/VIDEO SWITCH MATRIX

STMicroelectronics 

STV6411A

I²C BUS SELECTION (Cont’d)

TV Video Outputs

Register

Address

(HEX)

Description

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

R/C TV Output Selection

X X X X X X X 0 Red signal selected

1

X X X X X X X 1 Chroma signal selected

X X X X X X 0 X CVBS to RF output

RF output : adder control and

X X X X X X 1 X Y+C to RF output

chroma subcarrier filter

2

selection

X X X X X 0 X X Filter not active

X X X X X 1 X X Filter active

X X 0 0 0 X X X Y/CVBS & chroma muted

X X 0 0 1 X X X Y/CVBS_AUX & R/C_AUX

03

X X 0 1 0 X X X Y_AUX & R/C_AUX

Y/CVBS output and chroma

signal selection

X X 0 1 1 X X X Y/CVBS _VCR & C_VCR

3

X X 1 0 0 X X X CVBS_ASTB & Chr. muted

X X 1 0 1 X X X Y/CVBS_ENC & R/C_ENC

X X 1 1 0 X X X Y_ENC & C_ENC

X X 1 1 1 X X X NOT ALLOWED

Chroma switch muting

1

X

0

X

X

X

X

X

X

Chroma Output controlled by 5-

d4-d3 from register 03.

X 1 X X X X X X Chroma Output forced to mute.

ENCODER R/Csub Clamp

X X X X X X X 0 Bottom Level Clamp

1

X X X X X X X 1 Average Level Clamp

AUX R/Csub Clamp

X X X X X X 0 X Bottom Level Clamp

1

X X X X X X 1 X Average Level Clamp

RGB output Gain

X X X X 0 0 X X +6dB gain

2

X X X X 1 1 X X +3dB gain (1dB/Step)

04

FB Output

X X 0 0 X X X X FB forced to low level

X X 0 1 X X X X FB forced to high level

2

X X 1 0 X X X X FB from Encoder

X X 1 1 X X X X FB from AUX

0 0 X X X X X X Muted

RGB ouputs selection

0 1 X X X X X X RGB_Encoder selected

2

1 0 X X X X X X RGB_AUX selected

1 1 X X X X X X NOT ALLOWED

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