STV0056AF 查看數據表（PDF） - STMicroelectronics

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STV0056AF

SATELLITE SOUND AND VIDEO PROCESSOR

STMicroelectronics 

STV0056AF

CONTROL REGISTERS (continued)

Video Mux Truth Tables

Register 2 <0:2> ⇒ Scart 1 video output control

Register 3 <0:2> ⇒ Scart 2 video output control

Register 4 <0:2> ⇒ Scart 3 decoder output control

The truth table for the three scart outputs are the same.

Register 2/3/4

Bit<2>

0

0

0

0

1

1

1

1

Bit<1>

0

0

1

1

0

0

1

1

Bit<0>

0

1

0

1

0

1

0

1

Baseband video

De-emphasized video

Normal video

Scart 3 return

Scart 2 return

Scart 1 return

Nothing selected

High Z or low power (default)

Video Output

Register 4

Bit <7>

0

1

0

1

Bit <6>

0

0

1

1

-150mV

0 (default)

+150mV

+300mV

Black Level Adjust on Scart 3

Audio Mux Truth Tables

Register 2

Bit <5>

0

1

0

1

Bit <4>

0

0

1

1

Switch K1/Audio Source Selection for Volume Output

Volume Output

A Audio deemphasis (K2 switch O/P)

C Scart 2 return

B Scart 3 return

- High Z or low power (default)

Bit <7>

0

1

0

1

Register 3

Bit <6>

0

0

1

1

Bit <6>

0

1

X

X

Register 0

Bit <5>

X

X

0

1

Switch K2/Audio Deemphasis

Audio Deemphasis

A No deemphasis

C J17

B 50µs

B 75µs (default)

Switch K3 & K4

ANRS I/O Select

A Noise reduction OFF

B Noise reduction ON (default)

A I/P = PLL

B I/P = Scart 3 return

Bit <5>

0

1

0

1

Register 3

Bit <4>

0

0

1

1

Switch K5/Audio Source Selection for Scart 2

Aux Audio Output

C PLL output

A Scart 3 return

B Audio deemphasis (K2 switch O/P)

- High Z or low power state (default)

Bit <5>

0

1

0

1

Register 4

Bit <4>

0

0

1

1

Switch K6/Audio Source Selection for Scart 3

Audio Decoder Output

A PLL output

C Audio deemphasis (K2 switch O/P)

B Scart 2 return

- High Z or low power state (default)

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