UPC1857A View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPC1857A

SOUND CONTROL IC WITH SURROUND AND I2C BUS

NEC => Renesas Technology 

µPC1857A

4.4 Explanation of Each Command

4.4.1 Mute

The mute function can be turned ON/OFF by using data of bit D7 of subaddress 00H.

Subaddress

00H

D7

Mute

Figure 4-1. Mute

D6

D5

D4

D3

D2

0

Output selection

Surround mode

Output mute

0 Mute: OFF

1 Mute: ON

D1

D0

Surround effect

Caution When changing the surround mode, and when turning ON/OFF power, use the mute function

(approx. 200 ms) for pop noise reduction.

4.4.2 Output selection

Output can be selected by using data of bits D5 and D4 of subaddress 00H.

Subaddress

00H

D7

Mute

Figure 4-2. Output Selection

D6

D5

D4

D3

D2

0

Output selection

Surround mode

Output selection

Data

Output

D5 D4 Lout Rout

00

L

R

01

L

L

10 R

R

1 1 L+R L+R

D1

D0

Surround effect

Caution The surround mode is OFF (D3, D2 = 11) in modes other than the stereo mode (D5, D4 = 00).

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