SM5877AM

NIPPON PRECISION CIRCUITS—2

BLOCK DIAGRAM

PIN DESCRIPTION

Number

Name

I/O

Description

1

MUTE

Ip

When MODE is HIGH: Soft mute ON/OFF control. Mute is active when HIGH.

When MODE is LOW: Attenuator level direction control. The attenuator direction is

down when HIGH.

2

DEEM

Ip

Deemphasis control. Deemphasis is ON when HIGH, and OFF when LOW.

3

CKO

O

16.9344 MHz clock output

4

DVSS

Digital ground pin

5

BCKI

Ip

Bit clock input pin

6

DI

Ip

Serial data input pin

7

DVDD

Digital supply pin

8

LRCI

Ip

Input sample data rate (fs) clock input pin. Left-channel input when HIGH, and right-

channel input when LOW.

9

TSTN

Ip

Test pin. Test mode when LOW.

Filter & attenuation

operation block

Noise shaper

operation block

Input interface

+

−

+

−

Attenuation

counter

PWM data

generation block

Timing

control

LRCI

DI

BCKI

LO

AVSS

RO

MODE

ATCK

MUTE

RSTN

DS

DVSS

DVDD

TSTN

TO1

AVDDL

DEEM

CKO

XVSS

XTO

XTI

XVDD

AVDDR

LR

LR

L

R

MUTEO