SM5846AP datasheet(17/36 Pages) NPC

17 / 36 page

SM5846AP

NIPPON PRECISION CIRCUITS—17

FUNCTIONAL DESCRIPTION

Mode Switching and Function Switching

The SM5846AP supports several operating modes and

function switches. Internal control ﬂags, set by the digital

inputs or serial data input signal from a microprocessor,

determine the status of those function switches.

Mode switching/function switch controls

Control request switching

MDS input and device control

Mode switching/function switching is performed under

input pin control when MDS is HIGH, and under internal

ﬂag control when MDS is LOW.

Stage

Name

Control request

Function

Input

Control ﬂag

System

MDS

Yes

IC control request switch (input pin/control ﬂag)

Operating mode switch

Yes

Operating mode switching

ASEL2

Yes

ASEL1

Yes

Clock switch

CKS

Yes

Input clock frequency switching

CKEN

Yes

Crystal oscillator operating control switching

Filter switch

DEEM

Yes

Deemphasis ON/OFF switching

FSEL2

Yes

Deemphasis ﬁlter sampling frequency set

FSEL1

Yes

MUTE

Yes

Mute ON/OFF control

DITH

Yes

(pos. logic)

Yes

(neg. logic)

Dither ON/OFF control

Input interface switch

SYNC

Yes

Jitter-free/sync mode switching

LRS

Yes

LRCI (LR clock) input polarity switching

IBS2

Yes

Input data length set

IBS1

Yes

Output interface switch

OBS

Yes

Output data length set

MDS1

1. Switching MDS during device operation is prohibited.

Control request

HIGH

Input pins

LOW

Control ﬂags

Input pin functions when MDS is LOW

All pins that are part of the microprocessor interface

can be used whenever MDS is LOW.

Pin name

Function

Notes

HS/MDT

Serial data transfer data

clock

Used for the

microprocessor

interface

ASEL2/MDC

Serial data transfer clock

input

SYNC/MDLE

Serial data transfer latch

enable input

CKS

CKS function switch input

Input pin control only

because there is no

corresponding

control ﬂag.

CKEN

CKEN function switch input

LRS

LRS function switch input

SM5846AP 数据表(PDF) 17 Page - Nippon Precision Circuits Inc

SM5846AP 数据表(HTML) 17 Page - Nippon Precision Circuits Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

数据表下载