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SM5846AP 数据表(PDF) 20 Page - Nippon Precision Circuits Inc

部件名 SM5846AP
功能描述  Multi-function Digital Filter
PDF  36 Pages
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制造商  NPC [Nippon Precision Circuits Inc]
网页  http://www.npc.co.jp/en
标志 NPC - Nippon Precision Circuits Inc

SM5846AP 数据表(HTML) 20 Page - Nippon Precision Circuits Inc

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SM5846AP
NIPPON PRECISION CIRCUITS—20
Other control settings
Input data length select
ISB1 and ISB2 flags are used to set the input data
length.
LRCI input polarity select
Pin LRS is used to set the LRCI input polarity.
Sync mode select
The SYNC pin or flag setting can be used to select
either jitter-free mode or sync mode to control syn-
chronization between input data and internal arith-
metic blocks.
IBS2
IBS1
Input data
length
Notes
HIGH
HIGH
20 bits
The length is set to the
default value of 16 bits
(IBS2 = LOW and IBS1 =
HIGH) after a reset.
HIGH
LOW
24 bits
LOW
HIGH
16 bits
LOW
LOW
32 bits
LRS
LRCI
Input channel
HIGH
HIGH
Left
HIGH
LOW
Right
LOW
HIGH
Right
LOW
LOW
Left
SYNC
Mode
Notes
HIGH
Jitter-free mode
The SYNC flag is set HIGH
(default) after a reset.
LOW
Sync mode
Filter Stage
Operating mode
The SM5846A supports 3 different operating modes
to control output data rate switching. The operating
mode is selected by the state of HS, ASEL1 and
ASEL2.
Operating speed and sampling frequency
The SM5846AP supports sampling frequencies of
32/44.1/48 kHz (normal-speed sampling mode) and
64/88.2/96 kHz (high-speed sampling mode).
Deemphasis filter
The SM5846AP contains a digital deemphasis filter
controlled by DEEM.
The sampling frequency is selected by FSEL1 and
FSEL2.
Digital attenuator
The digital attenuator is controlled by serial data
from the microprocessor interface. This data can set
attenuation and muting. Note that the digital attenua-
tor is only enabled when MDS is LOW. ATT1 and
ATT2 are used to set the attenuation in normal-speed
sampling and high-speed sampling, respectively.
HS
ASEL1
ASEL2
Operating mode1
1. Only the above 3 modes are valid.
Speed
Oversampling
HIGH
LOW
HIGH
Normal-speed
sampling
8-times
LOW
HIGH
HIGH
High-speed
sampling
8-times
LOW
4-times
Operating speed
Input sampling frequency
Normal-speed sampling
32/44.1/48 kHz
High-speed sampling
64/88.2/96 kHz
DEEM
Deemphasis
HIGH
ON
LOW
OFF
FSEL2
FSEL1
Sampling frequency fs (kHz)
Normal-speed
sampling
High-speed
sampling
HIGH
HIGH
44.1
88.2
HIGH
LOW
48
96
LOW
HIGH
44.1
88.2
LOW
LOW
32
64



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