UPC1857A Ver la hoja de datos (PDF) - NEC => Renesas Technology

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UPC1857A

SOUND CONTROL IC WITH SURROUND AND I2C BUS

NEC => Renesas Technology 

µPC1857A

4.2 Initialization

After power application, be sure to initialize the subaddresses as shown below.

Table 4-1. Initialization of µPC1857A (recommendation value)

Bit

MSB

LSB

D6

D5

D4

D3

D2

D1

Subaddress

D7

D0

00H

0

0

0

0

1

1

0

0

01H

0

−

−

−

−

−

−

−

02H

0

−

1

0

0

0

0

0

03H

0

−

0

1

0

0

0

0

04H

0

−

0

1

0

0

0

0

Caution Until initialization is completed, mute using an external unit.

Remark − : Don’t care.

4.3 Surround Function

For how to set the surround mode, refer to the table below.

Table 4-2. Setting Surround Mode

Setting

Surround Mode

Simulated

Music

Movie

OFF

Subaddress: 00H

D3

D2

0

0

0

1

1

0

1

1

Description

Units of Phase Shifter

Effect

4 units

Monaural to pseudo-stereo

1 unit

Stereo sound to surround

4 units

−

Through

Caution When changing the surround mode, use the mute function (approx. 200 ms) for pop noise

reduction.

20

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