NJU26108 SRS CSII 5.1 & TruSurround XT Decoder ■Package ■ General Description 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) at fclk=768Fs • 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 The detail hardware specification of the NJU26108 is described in the “ NJU26100 Series Hardware Data Sheet”. Ver.2004-08-26 -1- NJU26108 ■ Function Block Diagram AD1/SDIN NJU26108 AD2/SSb SERIAL AUDIO INTERFACE DSP ARITHMETIC UNIT SCL/SCK SERIAL HOST INTERFACE SDA/SDOUT BCKO PROGRAM CONTROL LRO L/R 24-BIT x 24-BIT MULTIPLIER SDO0 SDI0 ALU SDI1 RESETb C/LFE MCK TIMING GENERATOR XI SDO1 BCKI ADDRESS GENERATION UNIT SL/SR XO SDO2 LRI DELAY RAM DATA RAM GPIO AND CONFIGURATION INTERFACE FIRMWARE ROM SEL1 Fig. 1 NJU26108 Block Diagram ■ DSP Block Diagram NJU26108 Block Diagram Dialog Clarity Select L/R/L+R + + SR SW Master Volume SL Output Channel Trimmer 80Hz LPF L R Ls Rs SW R Delay + S L R L Focus TruSurround/ Through mode Focus L Focus Stereo Input Mode L R C TruSurround R TruBass Mixer (L/R,SL/SR,SW) Ls Rs L Passive Matrix Rt CS decode mode Mono Input Mode Input Trimmer Lt Circle Surround II Decoder Delay Mono To Stereo Phanton Center C L R C R Ls Rs Sw TruBass Fig. 2 NJU26108 Function Diagram -2- Ver.2004-08-26 NJU26108 ■ Pin Configuration VDDR VSSC VSSC VDDC VDDC 22 21 20 19 18 17 16 15 VSSC 14 VDDC 13 RESETb 12 VSSO 11 XO 10 XI 9 VDDO 31 32 LRO WDC 30 BCKO NJU26108 29 MCK VDDR 28 BCKI 23 27 LRI VSSR 26 TEST0 24 25 SDI1 VSSR SDI0 3 4 5 6 7 SDO1 SDO0 SEL1 SCL/SCK SDA/SDOUT AD1/SDIN AD2/SSb 2 SDO2 8 1 Fig. 3 NJU26108 Pin Configuration ■ Pin Description Table 1 Pin Description No. Symbol I/O Description 1 SDO2 O Audio Data Output 2 SL/SR 2 SDO1 O Audio Data Output 1 C/SW 3 SDO0 O Audio Data Output 0 L/R Select I2C or Serial bus 4 SEL1 I *2 5 SCL/SCK I I2C Clock / Serial Clock 6 SDA/SDOUT I/O I2C I/O / Serial Output 7 AD1/SDIN I I2C Address / Serial Input 8 AD2/SSb I I2C Address / Serial Enable 9 VDDO -OSC Power Supply +2.5V 10 XI I X’tal Clock Input 11 XO O OSC Output 12 VSSO -OSC GND 13 RESETb I RESET (active Low) 14 VDDC -Core Power Supply +2.5V 15 VSSC -Core GND 16 WDC O *2 Clock for Watch Dog Timer *1 I : Input, O : Output, I/O : Bi-directional *2 SEL1 : Input, WDC : Output Ver.2004-08-26 No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Symbol VDDC VDDC VSSC VSSC VDDR VDDR VSSR VSSR SDI0 SDI1 TEST0 LRI BCKI MCK BCKO LRO I/O --------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 0 L/R Audio Data Input 1 L/R Connect to GND LR Clock Input Bit Clock Input Master Clock Output Bit Clock Output LR Clock Output -3- NJU26108 ■ Audio Data Output The NJU26108 audio interface provides industry standard serial data formats of I2S, MSB-first left-justified or MSB-first right-justified. The NJU26108 audio interface provides two data inputs, SDI0 and SDI1, and three data outputs, SDO0, SDO1 and SDO2, as shown in table 2 and 3. The input serial data is selected by the firmaware command. Table 2 Pin No. 25 26 Table 3 Pin No. 3 2 1 Serial Audio Input Pin Symbol SDI0 SDI1 Description Audio Data Input 0 L / R Audio Data Input 1 L / R Serial Audio Output Pin Symbol SDO0 SDO1 SDO2 Description Front Lch/Rch Output Center/Sub Woofer Output Rear Lch/Rch Output ■ 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 address. 4 addresses could be chosen by AD1 and AD2-pin. The AD1 and AD2-pin addresses are decided by the connections of AD1 and AD2-pin. The AD1 and AD2 addresses should be the same level as AD1 and AD2-pin connections. . Table 4 I2C Bus SLAVE Address bit7 bit6 bit5 bit4 Bit3 bit2 bit1 bit0 0 0 1 1 1 AD2*1 AD1*1 R/W *1 AD1 or AD2 address is 0 when AD1 or AD2-pin is “L”. AD1 or AD2 address is 1 when AD1 or AD2-pin is “H”. The detail I2C bus timing of the NJU26108 is described in the “ NJU26100 Series Hardware Data Sheet”. -4- Ver.2004-08-26 NJU26108 ■ Firmware Command Table 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 1 Set Task 2 CSII Mode 3 TruBass Mode Command Description 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 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 : 0 ~ -15dB In respect to detail command information, request NJR. Ver.2004-08-26 -5- NJU26108 ■ License Information 1. The SRS technology right incorporated in the NJU26108 are owned by SRS Labs, a U.S. Corporation and licensed to New Japan Radio Co., Ltd. SRS is protected under U.S. and foreign patents issued and / or pending. “SRS”, “Circle Surround II 5.1”, “TruSurround XT”, ”Focus”, “TruBass” and the are trademarks of SRS Labs, Inc. in the United States and selected foreign countries. Neither the purchase of the NJU26108, nor the corresponding sale of audio enhancement equipment conveys the right to sell commercialized recordings made with any SRS technology. SRS Labs requires that all users of the NJU26108 must enter into a license agreement directly with SRS Labs if the royalty is not Included in the purchase price. SRS Labs also requires any users to comply with all rules and regulations as outlined in the SRS Trademark Usage Manual. For further information, please contact: SRS Labs, Inc. 2909 Daimler Street. Santa Ana, CA 92705 USA Tel: 949-442-1070 Fax: 949-852-1099 http://www.srslabs.com 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. [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. Ver. 1.30 -6- Ver.2004-08-26