SM5846AP Datasheet, PDF (17/36 Pages) Nippon Precision Circuits Inc – Multi-function Digital Filter

FUNCTIONAL DESCRIPTION
SM5846AP
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
Stage
System
Operating mode switch
Clock switch
Filter switch
Input interface switch
Output interface switch
Name
MDS
HS
ASEL2
ASEL1
CKS
CKEN
DEEM
FSEL2
FSEL1
MUTE
DITH
SYNC
LRS
IBS2
IBS1
OBS
Control request
Input Control flag
Function
Yes
IC control request switch (input pin/control flag)
Yes
Yes
Yes
Yes
Operating mode switching
Yes
Yes
Yes
Input clock frequency switching
Yes
Crystal oscillator operating control switching
Yes
Yes
Deemphasis ON/OFF switching
Yes
Deemphasis filter sampling frequency set
Yes
Yes
Mute ON/OFF control
Yes
(pos. logic)
Yes
(neg. logic)
Dither ON/OFF control
Yes
Yes
Jitter-free/sync mode switching
Yes
LRCI (LR clock) input polarity switching
Yes
Input data length set
Yes
Yes
Yes
Output data length set
Control request switching
MDS input and device control
Input pin functions when MDS is LOW
Mode switching/function switching is performed under _{All pins that are part of the microprocessor interface}
input pin control when MDS is HIGH, and under internal _{can be used whenever MDS is LOW.}
flag control when MDS is LOW.
MDS¹
HIGH
LOW
Control request
Input pins
Control flags
1. Switching MDS during device operation is prohibited.
Pin name
Function
HS/MDT
Serial data transfer data
clock
ASEL2/MDC Serial data transfer clock
K
input
SYNC/MDLE
Serial data transfer latch
enable input
Notes
Used for the
microprocessor
interface
CKS
CKEN
LRS
CKS function switch input
CKEN function switch input
LRS function switch input
Input pin control only
because there is no
corresponding
control flag.
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