STV6412A データシートの表示（PDF） - STMicroelectronics

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STV6412A

Audio/video switch matrix

STMicroelectronics 

STV6412A

I2C bus selection

Table 17. RGB & fast blanking outputs

Reg.

addr

(hex)

Description

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

Fast blanking control

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

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

X X X X X X 1 0 FB from encoder

X X X X X X 1 1 FB from VCR

RGB selection

2 X X X X 0 0 X X Muted

X X X X 0 1 X X RGB_ENC selected

X X X X 1 0 X X RGB_VCR selected

X X X X 1 1 X X Not allowed

03 RGB gain

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

X X 0 1 X X X X +5 dB gain

X X 1 0 X X X X +4 dB gain

X X 1 1 X X X X +3 dB gain

t(s) RGB and fast blanking

uc control

1 X 0 X X X X X X +0 dB extra gain

X 1 X X X X X X +3 dB for weak input signals

1 0 X X X X X X X RGB and FB outputs high

impedance state

1 X X X X X X X RGB and FB outputs active

rod Table 18. RF & miscellaneous control

P Reg.

te addr

le (hex)

Description

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

so R/C TV output selection

- Ob RF output: adder control

) and chroma sub-carrier

t(s filter selection

uc 04 C_Gate output control

rod C_VCR output control

te P Slow blanking mode

ObsoleIT enable

1

X X X X X X X 0 Red signal selected

X X X X X X X 1 Chroma signal selected

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

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

X X X X X 0 X X Filter not active

X X X X X 1 X X Filter active

1 X X X X 0 X X X High level

X X X X 1 X X X Low level

1 X X X 0 X X X X Tri-state mode (high impedance)

X X X 1 X X X X Active

1 X 0 X X X X X X Normal mode

X 1 X X X X X X SLB TV is driven by SLB VCR

1 0 X X X X X X X No interrupt flag

1 X X X X X X X IT enable

Doc ID 9754 Rev 2

19/31

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