CXA2079Q データシートの表示（PDF） - Sony Semiconductor

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CXA2079Q

S2-Compatible 6-Input 2-Output Audio/Video Switch

Sony Semiconductor 

CXA2079Q

2) Control Registers

The CXA2079Q control is exercised by writing 2-byte data into the two 8-bit control registers which control the

output selector circuits for the 2 outputs.

S Slave address A

DATA1

A

DATA2

AP

S: Start condition

A: Acknowledge

P: Stop condition

Control register structure (DATA1 and DATA2)

• All registers are set to "0" during IC power on.

• "∗" indicates undefined.

b7

b6

b5

b4

b3

Slave add.

1

0

0

1

0

DATA1 A-GAIN S/COMP1

V-IN1

DATA2

∗

S/COMP2

AV-IN2

R/W (1): Read/write mode

0: Control data write

1: Status register read

b2

b1

b0

0

ADR

R/W

A-IN1

DC OUT

∗

ADR (1): This bit sets the slave address set by the address pin.

0: 90H

1: 92H

A-GAIN (1): LOUT1/ROUT1 output gain selector

0: 0dB output

1: –6dB output

S/COMP1 and S/COMP2 (1 each): S terminal input/composite signal input selectors

By setting these bits to "0", when composite signal input is selected, YOUT/COUT output the inputs

from YIN/CIN during video 1/2 output.

0: Composite signal inputs (TV, V1 to V5 inputs)

1: S terminal inputs (Y1/C1 to Y4/C4 inputs)

V-IN1 (3 each): This bit selects the input signals output to each video output.

0: Mute

1: Selects the TV input

2: Selects the V1 and Y1/C1 inputs

3: Selects the V2 and Y2/C2 inputs

4: Selects the V3 and Y3/C3 inputs

5: Selects the V4 and Y4/C4 inputs

6: Selects the V5 input

7: Mute

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