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NJU26106
Dolby Pro Logic II / Virtual Dolby Surround Decoder
General Description
The NJU26106 is a digital audio signal decoder that provides the function of Dolby Pro Logic II and Virtual Dolby Surround. The NJU26106 processes the stereo matrix-encoded signal into spacious sound of 5.1 channels by Dolby Pro Logic II and Bass Management System. Also non matrix-encoded audio signal can be processed into effective spacious sound by Music mode. The decoded 5-channel signal can be downmixed into 2-channel virtual surround output by the Dolby Virtual technology. The NJU26106 is suitable for multi-channel products such as AV AMP and Car Audio, or ordinary audio products such as small speaker system.
Package
NJU26106
FEATURES
* 5.1 Channel signal outputs by Dolby Pro Logic II * 2 Channel outputs by Virtual Dolby Surround * Movie mode / Music mode * Available for Center width control, Dimension control, Panorama mode Music mode and Custom mode
Digital Signal Processor Specification
* 24bit Fixed-point Digital Signal Processing * Maximum Clock Frequency : 38MHz * Digital Audio Interface : 2 Input ports 3 Output ports * Digital Audio Format : I2S 24bit, Left-Justified, Right-Justified, BCK : 32Fs / 64Fs * Master / Slave Mode * Master Mode MCK : 1/2 fclk, 1/3 fclk ex. MCK = 384Fs(1/2) or MCK = 256Fs(1/3) at fclk=768Fs * Two kinds of micro computer interface I2C Bus (standard-mode/100Kbps) 4-Wire Serial Bus (4-Wire: Clock, Enable, Input data, Output data) * Power Supply : DSP Core : 2.5V I/O interface: 2.5V ( +3.3V tolerant ) * Package : QFP 32pin
The detail hardware specification of the NJU26106 is described in the " NJU26100 Series Hardware Data Sheet". In respect to software commands, request NJR.
Ver.2003-05-16
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NJU26106
DSP Block Diagram
Fig. 1 NJU26106 Block Diagram
AD1/SDIN AD2/SSX
NJU26106
DSP ARITHMETIC UNIT SERIAL AUDIO INTERFACE BCKO LRO 24-BIT x 24-BIT MULTIPLIER ALU L/R SDO0 SDI0 SDI1 C/LFE SDO1 BCKI SL/SR SDO2 LRI
SCL/SCK
SDA/SDOUT
SERIAL HOST INTERFACE
PROGRAM CONTROL
RESETX MCK XI XO TIMING GENERATOR ADDRESS GENERATION UNIT
DELAY RAM
DATA RAM
FIRMWARE ROM
GPIO AND CONFIGURATION INTERFACE
SEL1
Pro Logic II & Virtual Dolby Surround Decoder
Fig. 2 NJU26106 Function Diagram
ProLogicII and Virtual Dolby Surround Decorder Block Diagram
Lt ProLogic II Rt
L C R Ls Rs
Scale Scale Scale Scale Scale
L C R Bass Management Ls Rs SW
Left Output Right Output Master Volume Scale L/R Balance Center Output Subwoofer Output LeftSurround Output RightSurround Output
Virtual Dolby Surround
L R
Delay
Noise Generator
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Ver.2003-05-16
NJU26106
Pin Configuration
VDDR VDDR VDDC VDDC VSSR
24
VSSR
23
VSSC
VSSC
22
21
20
19
18
17
SDI0 SDI1 TEST1 LRI BCKI MCK BCKO LRO
Fig. 3 NJU26106 Pin Configuration
25
TEST0 VSSC VDDC RESETX VSSO XO XI VDDO
16
26 15 27 14 28
NJU26106
13
29 30 31 32 1
12 11 10 9
2
3
4
5
6
7
8
SDO2
SDO1
SDO0
SEL1
SCL/SCK
SDA/SDOUT
AD1/SDIN
AD2/SSX
Pin Description
Table 1 Pin Description
No. Symbol I/O Description No. 1 SDO2 O Audio Data Output CH2 Sl / Sr 17 2 SDO1 O Audio Data Output CH1 C / SW 18 3 SDO0 O Audio Data Output CH0 L / R 19 4 SEL1 I Select I2C (L) or Serial bus (H) 20 5 SCL/SCK I I2C Clock / Serial Clock 21 6 SDA/SDOUT IO I2C I/O / Serial Output 22 2 7 AD1/SDIN I I C Address / Serial Input 23 8 AD2/SSX I I2C Address / Serial Enable 24 9 VDDO P OSC Power Supply +2.5V 25 10 XI I X'tal Clock Input 26 11 XO O X'tal Clock Output 27 12 VSSO G OSC GND 28 13 RESETX I RESET 29 14 VDDC P Core Power Supply +2.5V 30 15 VSSC G Core GND 31 16 TEST0 IO OPEN 32 * I : Input, O : Output, IO : Bi-directional, P : +Power, G : GND Symbol VDDC VDDC VSSC VSSC VDDR VDDR VSSR VSSR SDI0 SDI1 TEST1 LRI BCKI MCK BCKO LRO I/O P P G G P P G G I I I I I O O O Description Core Power Supply +2.5V Core Power Supply +2.5V Core GND Core GND I/O Power Supply +2.5V I/O Power Supply +2.5V I/O GND I/O GND Audio Data Input CH0 L / R Audio Data Input CH1 L / R GND LR Clock Input Bit Clock Input Master Clock Output Bit Clock Output LR Clock Output
Ver.2003-05-16
-3-
NJU26106
Audio Data Output
The NJU26106 audio interface provides Industry standard serial data formats of I2S, MSB-first left-justified or MSB-first right-justified. The NJU26106 audio interface provides two data inputs, SDI0 and SDI1, and three data outputs, SDO0, SDO1 and SDO2, as shown in fig.1. The input serial data is selected by the firmaware command. In Virtual Dolby Surround mode, SD0 output generates Lch. and Rch. signal. The other channels are muted. The input serial data is selected by the firmaware command.
Table 2
Symbol SDI0 SDI1
Serial Audio Input Pin
Pin No. 25 26 Description Sound Data Input 0 L / R Sound Data Input 1 L / R
Table 3
Symbol SDO0 SDO1 SDO2
Serial Audio Output Pin
Pin No. 3 2 1 Description Front Lch/Rch Output(*) Center/Sub Woofer Output Rear Lch/Rch Output
(*) In Virtual Dolby Surround mode, only front Lch/Rch output signal. The other channels are muted.
I C address
2
AD1 and AD2 pins are used to configure the seven-bit SLAVE address of the serial host interface. These pins offer additional flexibility to SLAVE addresses. In the NJU26106, AD2-pin should be connected to "H". 2 kinds of addresses could be chosen for AD1. The AD1 address is decided by the connection of AD1-pin. The AD1 address should be the same level as AD1-pin. .
Table 4
I2C Bus SLAVE Address
bit7 bit6 bit5 bit4 Bit3 bit2 bit1 bit0 0 0 1 1 1 AD2*1 AD1*2 R/W *1 AD2-pin should be connected to high level. AD2 address should be 1. *2 AD1 address is 0 when AD1-pin is "L". AD1 address is 1 when AD1-pin is "H".
The detail I2C bus timing of the NJU26106 is described in the " NJU26100 Series Hardware Data Sheet".
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Ver.2003-05-16
NJU26106
NJU26106 Bass Management
1. The specification of Bass Management is the extended version from Dolby. 2. The 4 types of crossover frequencies for speaker are selectable. ( fig. 5, 6 ) 100, 150, 200, 250Hz ( 12dB / Oct. ) 3. The 4 types of low frequency destinations are selectable. ( fig. 4 ) Subwoofer, Left / Right, Left Surr / Right Surr, Left / Right + Left Surr / Right Surr
Fig. 4 Bass Management Function Block Diagram
NJU26106 Pro Logic II Bass Management
LPF Delay & Attenuator LPF Attenuator FRONT REAR SUB
Subwoofer
Lt
HPF
Thru
L Lt C
Left Center Right Left Surround Right surround
BM Thru
Rt
HPF
Pro Logic II R Decoder
Rt Ls Rs
BM
Crossover Frequency for BM 100/150/200/250Hz 12dB/oct
Ver.2003-05-16
-5-
NJU26106
Fig. 5 NJU26106 High Pass Filter
Cutoff Frequency : 100 / 150 / 200 / 250Hz
A udio P recision
+0 -5 -10 -15 -20 d B F S -25 -30 -35 -40 -45 -50 -55 -60 20
12dB / Oct.
B ass Managem ent HPF
+0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 d B F S
50
100
200
500 Hz
1k
2k
5k
10k
20k
Fs = 48 kH z H PF (In pu t = C e nter@ 2 3d B / Outpu t = C e nter) 1 00 H z (R ed ) 1 50 H z (Blue ) 2 00 H z (Mag en ta ) 2 50 H z (Gree n) ba s s 2s ub _iza .a t2
Fig. 6 NJU26106 Low Pass Filter
Cutoff Frequency : 100 / 150 / 200 / 250Hz
A udio P recision
+0 -5 -10 -15 -20 d B F S -25 -30 -35 -40 -45 -50 -55 -60 20
12dB / Oct.
Bass Managem ent LP F
+0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50 -55 -60 d B F S
50
100
200
500 Hz
1k
2k
5k
10k
20k
Fs = 48 kH z L PF (In pu t = C e nter@ 2 3d B / Outpu t = C e nter) 1 00 H z (R ed ) 1 50 H z (Blue ) 2 00 H z (Mag en ta ) 2 50 H z (Gree n) ba s s 2s ub _iza .a t2
-6-
Ver.2003-05-16
NJU26106
Firmware Command Table
The NJU26106 can be controlled by host processor vie I2C bus or 4-Wire serial bus interface. The following table summarizes the available user commands.
Table 5 NJU26106 Command
No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Command System SET_TASK_CMD VDS_ANG_CMD DPL_SUR_CMD CWIDTH_DIM_CMD DPL_MOD_CMD BASS_MGNT_CMD FS_CMD NOISE_CMD DLY_CMD LR_BAL_CMD MST_VOL_CMD LCH_VOL_CMD RCH_VOL_CMD CENT_VOL_CMD SURR_LEFT_VOL_CMD SURR_RIGHT_VOL_CMD SW_VOL_CMD SYS_SET_CMD Command Description Set decoding mode: Pro Logic II, Virtual Dolby Surround, Pink Noise Generator Set Virtual Dolby Surround Speaker separation angle Set Pro Logic II Decode Mode (Movie,Music,etc) and Panorama mode Set Pro Logic II Center Width and Dimension configuration Set Pro Logic II Variable Setting, Auto input Balance and Shelf Filter, Rs Polarity Inversion, etc Set Bass Management Configuration, LFE Cutoff Frequency Configuration Set sampling rate Set Output Speaker Configuration for Pink Noise Generator Set Surround Channel Delay Time Set L/R Volume Balance Set MASTER Volume Set L Channel Volume Set R Channel Volume Set Center Channel Volume Set Surround Left Channel Volume Set Surround Right Channel Volume Set Subwoofer Channel Volume Configure serial audio interface MASTER/SLAVE, etc. format, LR & BCK
In respect to detail command information, request NJR.
Ver.2003-05-16
-7-
NJU26106
License Information
1. The Word "DOLBY", "Pro Logic" and the double D mark are trademarks of Dolby Laboratories. The NJU26106 can only be delivered to licensees of Dolby Laboratories. Please refer to the licensing application manual issued by Dolby Laboratories.
2 Purchase of I2C components of New Japan Radio Co. ,Ltd or one of sublicensed Associated Companies conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard specification as defined by Philips.
Ver. 3.0
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
-8-
Ver.2003-05-16

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