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SM5844 データシート(PDF) 12 Page - Nippon Precision Circuits Inc

部品番号 SM5844
部品情報  Asynchronous Sample Rate Converter
PDF  26 Pages
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メーカー  NPC [Nippon Precision Circuits Inc]
ホームページ  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM5844 データシート(HTML) 12 Page - Nippon Precision Circuits Inc

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SM5844AF
NIPPON PRECISION CIRCUITS—12
FUNCTIONAL DESCRIPTION
Input Data Interface (DI, LRCI, BCKI, IFM1, IFM2)
Attenuator and Deemphasis Selection
The attenuator is set using the microcontroller
interface. When the attenuator is used, deemphasis
settings also need to be set using the microcontroller
interface. The microcontroller interface comprises
MDT, MCK and MLEN, and is used to receive all
input serial data.
When MCOM is HIGH, serial data received on
MDT, MCK and MLEN sets the attenuation data and
control flag data.
When MCOM is LOW, the logic levels on FSI1,
FSI2 and DEEM select the device function.
Mode
IFM1
IFM2
W ord length
Data position
Data
sequence
Common f eatures
1
L O W
L O W
16 bits
Rear packe d
MSB first
Non IIS
L/R alternating
Bit serial
2
L O W
HIGH
20 bits
3
HIGH
L O W
Front packe d
4
HIGH
HIGH
Rear packe d
LSB first
Table 1. Attenuator and deemphasis function
selection
Function
Function set method
External pins
(MCOM = LOW )
Microcontroller
interface flags
(MCOM = HIGH)
Deemphasis
ON/OFF
DEEM
FDEEM
Deemphasis
frequency (fsi)
select
FSI1, FSI2
FFSI1, FFSI2
Attenuator data set
N/A (no attenuation)
11 bits (a1 to a11)
Test mode select
Irreversible
(test mode 1)
FTST1, FTST2



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