STV6412ADT 查看數據表（PDF） - STMicroelectronics

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STV6412ADT

Audio/video switch matrix

STMicroelectronics 

I2C bus selection

STV6412A

l

Table 19. Slow blanking & inputs contro

Reg.

addr

(hex)

Description

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

Encoder R/Csub clamp

1 X X X X X X X 0 Bottom level clamp

X X X X X X X 1 Average level clamp

VCR R/Csub clamp

1 X X X X X X 0 X Bottom level clamp

X X X X X X 1 X Average level clamp

Encoder input level

adjustment

05

Slow blanking TV SCART

2 X X X X 0 0 X X 0 dB for normal audio inputs

X X X X 0 1 X X +6 dB for weak audio inputs

X X X X 1 0 X X +9 dB for weak audio inputs

2 X X 0 0 X X X X Input mode only

X X 0 1 X X X X Output < 2 V

X X 1 0 X X X X Output 16/9 format

X X 1 1 X X X X Output 4/3 format

2

t(s) Slow blanking VCR SCART

0 0 X X X X X X Input mode only

0 1 X X X X X X Output < 2 V

1 0 X X X X X X Output 16/9 format

1 1 X X X X X X Output 4/3 format

uc Table 20.

rod Reg.

P addr

(hex)

Standby modes

Description

lete ENC inputs

bso VCR inputs

- O TV inputs

t(s) AUX inputs

duc 06 VCR outputs

Pro CINCH outputs

lete TV outputs

ObsoRFmod outputs

Data

Bits

d7 d6 d5 d4 d3 d2 d1 d0

Comments

1 X X X X X X X 0 Inputs active

X X X X X X X 1 Inputs disabled

1 X X X X X X 0 X Inputs active

X X X X X X 1 X Inputs disabled

1 X X X X X 0 X X Inputs active

X X X X X 1 X X Inputs disabled

1 X X X X 0 X X X Inputs active

X X X X 1 X X X Inputs disabled

1 X X X 0 X X X X Audio & video outputs ON

X X X 1 X X X X Audio & video outputs OFF

1 X X 0 X X X X X Audio & video outputs ON

X X 1 X X X X X Audio & video outputs OFF

1 X 0 X X X X X X Audio & video outputs ON

X 1 X X X X X X Audio & video outputs OFF

1 0 X X X X X X X Audio & video outputs ON

1 X X X X X X X Audio & video outputs OFF

Full stop

1

1

1

1

1

1

1

1

Only I2C bus and slow blanking

detection parts are supplied.

20/31

Doc ID 9754 Rev 2

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