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PDF NJU26108 Data sheet ( Hoja de datos )

Número de pieza NJU26108
Descripción SRS CSII 5.1 AND TruSurround XT Decoder
Fabricantes New Japan Radio 
Logotipo New Japan Radio Logotipo



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NJU26108
SRS CSII 5.1 & TruSurround XT Decoder
General Description
Package
The NJU26108 is a digital signal processor that provides the function of Circle
Surround II 5.1 / TruSurroundXT and Mono-to-Stereo.
The NJU26108 processes the stereo matrix-encoded signal into spacious sound of 5.1
channels by Circle Surround II 5.1. Also non matrix-encoded audio signal can be
processed into effective spacious sound.
The decoded 2-channel signal can be converted into spacious 2-channel virtual
surround output by the TruSurroundXT technology.
The applications of NJU26108 are suitable for multi-channel products such as DVD
Receivers, AV Amplifiers, TV, Car Audio or ordinary audio products such as small
speakers system.
NJU26108FR1
FEATURES
5.1-Channel signal outputs by Circle Surround II 5.1
2-Channel outputs by SRS TruSurroundXT
Mono-to-Stereo function
LFE by SRS TruBass
SRS Focus
Two kinds of micro computer interfaces
I2C bus ( standard-mode / 100Kbps )
Serial Interface (4 lines: Clock, Enable, Input data, Output data)
Digital Signal Processor Specification
24bit Fixed-point Digital Signal Processing
Maximum System Clock Frequency
: 38MHz
Digital Audio Interface
: 2 Input ports / 3 Output ports
Master / Slave Mode
Master Mode MCK
:1/2 fclk, 1/3 fclk
ex. MCK = 384Fs(1/2) or MCK = 256Fs(1/3)
Two kinds of micro computer interface
I2C bus (standard-mode/100kbps)
Serial interface (4 lines: clock, enable, input data, output data)
Power Supply
: 2.5V ( 3.3V Input tolerant )
Package
: QFP32-R1
at fclk=768Fs
The detail hardware specification of the NJU26108 is described in the “ NJU26100 Series Hardware Data
Sheet”.
Ver.2004-08-26
-1-

1 page




NJU26108 pdf
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Firmware Command Table
NJU26108
Host processor can control the NJU26108 via I2C bus or 4-Wire serial bus interface. The following table
summarizes the available user commands.
Table 5 NJU26108 Command
No. Command
Command Description
1 Set Task
2 CSII Mode
3 TruBass Mode
Set Task : Mono-Stereo, TruSurround, Focus, TruBass,
CSII 5.1, Input Select
Set CSII mode : Cinema / Music, Phantom Center,
Rear Boost, Full Band Width, 525 Mode
Set TruBass mode : Sr/Sl, Sub Woofer, L/R, Speaker Size
4 TruBass Base Control
Set TruBass Base : Gang Mode, Mute, TruBass Level
5 Focus Mode
Set Focus mode : Sl / Sr, L / R, C
6 Focus Control
Focus Control : Gang, Mute, Focus Value
7 Mono Input Select
Set Mono Input : L / R, L+R
8 Sample Rate
Set Sample Rate : 48, 44.1, 32 KHz
9 Rear Space Gain
Set Rear Space Gain
: 0 ~ -15dB
10 4 Ch. Stereo Mode
Select 4 Ch. Stereo Mode : On / Off
11 Delay
Set Delay Time
: 0 ~ 10 ms
12 Master Volume
Set Master Volume : 0 ~ -63dB
13 Input Trimmer
Set Input Trimmer
: 0 ~ -63dB
14 Left Volume
Set Left Volume
: 0 ~ -63dB
15 Right Volume
Set Right Volume
: 0 ~ -63dB
16 Left Volume
Set Left Volume
: 0 ~ -63dB
17 Center Volume
Set Center Volume : 0 ~ -63dB
18 Sl Volume
Set Sl Volume
: 0 ~ -63dB
19 Sr Volume
Set Sr Volume
: 0 ~ -63dB
20 SubWoofer Volume
21 System Status
22 TruBass Base Control SW
23 TruBass Base Control Sl / Sr
24 Focus Control L / R
25 Focus Control Sl / Sr
26 NOP
Set SubWoofer Volume : 0 ~ -63dB
Set System Status : DSP Mode, Data Width, Serial Audio Mode,
Audio Clock, MCK clock
TruBass Base Control SW : Gang Mode, Mute, TruBass
Level
TruBass Base Control Sl / Sr : Gang Mode, Mute, TruBass
Level
Focus Control L / R
: Gang Mode, Mute, Focus
Level
Focus Control Sl / Sr
: Gang Mode, Mute, Focus
Level
Check DSP status
In respect to detail command information, request NJR.
Ver.2004-08-26
-5-

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