CXA2079Q Просмотр технического описания (PDF) - Sony Semiconductor

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CXA2079Q

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

Sony Semiconductor 

CXA2079Q

Status register structure (DATA1 and DATA2)

Slave add.

DATA1

DATA2

b7

1

S1SEL

S1SEL

b6

0

S2SEL

S2SEL

b5

0

S3SEL

S3SEL

b4

1

S4SEL

S4SEL

b3

b2

0

0

S-C1

S-C3

b1

b0

ADR

1

S-C2

S-C4

S1SEL to S4SEL (1 each): S-1 to S-4 pin status

0: S-1 to S-4 pins are not grounded.

1: S-1 to S-4 pins are grounded.

S1SEL to S4SEL are actually determined by comparing the S-1 to S-4 pin DC voltages with 3.5V.

S-1 to S-4 pin DC voltage

3.5V or more

3.5V or less

S1SEL to S4SEL

0

1

S-C1, S-C2, S-C3, S-C4 (2 each): S2-1, S2-2, S2-3 and S2-4 pin status

0: 4:3 video signal

1: 4:3 letter-box signal

2: 16:9 video squeezed signal

3: No signal

S-C1 to S-C4 are actually determined by comparing the S2-1 to S2-4 pin DC voltages with two

threshold. However, when the S-1 to S-4 pins are open, the outputs are fixed to "3".

S2-1 to S2-4 pin DC voltage

1.3V or less

1.3V or more to 2.5V or less

2.5V or more

S-1 to S-4 OPEN

S-C1 to S-C4

0

1

2

3

4) Power-on Reset

The CXA2079Q has an internal power-on reset function that sets each control register to "0" during IC power

ON.

The power-on reset VTH has hysteresis.

Power-on reset

released

Power-on reset

4.5V

– 17 –

VCC

5.6V

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