7464

TDA7464 DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SRS SURROUND SOUND AND VOICE CANCELLER The Device incorporates the SRS (Sound Retrieval System) under licence from SRS Labs, Inc. 4 STEREO INPUTS INPUT ATTENUATION CONTROL IN 0.5dB STEP TREBLE MIDDLE AND BASS CONTROL VOICE CANCELLER IS AVAILABLE STEREO SRS SURROUND SOUND WITH CENTER & SPACE CONTROL IS AVAILABLE THREE STANDARD SURROUND MODES ARE AVAILABLE: - MUSIC IN 4 DIFFERENT SELECTABLE RESPONSES - MOVIE AND SIMULATED IN 256 DIFFERENT SELECTABLE RESPONSES 2 SPEAKERS OUTPUTS - INDEPENDENT ATTENUATORS IN 1dB STEP FOR BALANCE FACILITY - ZERO CROSSING ATTENUATION AVAILABLE - INDEPENDENT MUTE FUNCTION 2 RECORD OUTPUTS - INDEPENDENT ATTENUATORS IN 1dB STEP FOR BALANCE FACILITY - MUX AVAILABLE FORPROCESSES SIGNAL SELECTION - INDEPENDENT MUTE FUNCTION ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS TQFP44 ORDERING NUMBER: TDA7464 PIN CONNECTION R_IN4 R_IN3 R_IN2 CREF 44 43 42 41 40 39 38 37 36 35 34 LP1 HP1 HP2 NETW1 NETW2 VAR_L BASSO_L VAR_R BASSO_R BASS_LO BASS_LI 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 33 32 31 30 29 28 27 26 25 24 23 R_IN1 VREFOUT L_IN1 L_IN2 L_IN3 L_IN4 RECOUT_L RECOUT_R L_OUT R_OUT DIG_GND DESCRIPTION The TDA7464 is a volume tone (bass middle and treble) balance (Left/Right) processors with stereo SRS and voice canceller for quality audio applications in car radio, Hi-Fi, TV systems. It reproduces SRS (Sound Retrieval System) sound by external components and surround sound by using phase shifters and a signal matrix. The AC signal setting is obtained by resistor networks and switches combined with operational amplifiers according to the SRS laboratories MIDDLE_LO BASS_RI MIDDLE_RI TREBLE_L BASS_RO MIDDLE_RO MIDDLE_LI TREBLE_R AGND SDA SCL LPVC D96AU483C PS1 PS2 PS3 PS4 LP specification. Control of all the functions is accomplished by serial bus. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained. VS February 1998 1/21 MIDDLE-LI MIDDLE-LO 50K + V REF 100K CENTER 4 NETW1 18 TREBLE-R SPACE 17 32 LP 1K 1.2nF 130K 5.6nF 4.42K 1.5K 32.4K 47.5K 4.7nF 0.47 µF NETW2 44 5 STEREO SRS 0.22µF LPF + VOICE ON MIX SW SRS AGND CREF VREFOUT MIDDLE-RI 18nF 2.7K 22nF MIDDLE-RO 100nF 22µF BASS-RI 2/21 100nF 2.2µF BASS-LI 11 RB FIX 30K 10 7 6 N.B. SW BASS-LO BASSO-L VAR-L 4.7nF 22nF 22nF 5.6nF 2.7K 18nF 22nF 100nF 5.6K 100nF PS1 43 MIX SW RPS1 + 27 79dB CONTROL SURR REC ATT VAR REAR MUTE 3BAND 79dB CONTROL + FIX SPKR ATT MUTE RPS2 RPS3 RPS4 RM 42 41 40 19 15 14 PS2 PS3 PS4 TREBLE-L PS1 90Hz MUSIC R6 OFF SURR MOVIE/ SIM SRS FIX PS2 4KHz PS3 400Hz PS4 400Hz RECOUT-L 25 + MIXING AMP TREBLE BASS MIDDLE SIM L-OUT + L-R I2 C BUS DECODER + LATCHES MOVIE/ MUSIC 22 21 23 SCL SDA DIG_GND LPF 9KHz TREBLE SURR MIDDLE BASS FIX FIX + 3BAND FIX REAR SURR REC ATT MUTE 30K N.B. SW RM 16 13 RB 12 BASS-RO 79dB CONTROL BASSO-R 2.2µF 100nF 5.6K 100nF 9 8 VAR-R D96AU481D TDA7464 BLOCK DIAGRAM 5.6nF 680nF LP1 HP1 HP2 0.22µF 31 1 31.5dB control 2 3 L-IN1 50K 0.22µF 30 RLP1 RHP1 L-IN2 50K 0.22µF 29 R5 L-IN3 50K - 0.22µF 28 + L-IN4 50K 0.22µF 33 + R-IN1 50K EFFECT CONTROL MIXING AMP 79dB CONTROL SPKR ATT VAR MUTE 26 0.22µF 35 + R-IN2 50K - 0.22µF 36 24 R-IN3 R-OUT 37 R-IN4 RECOUT-R 50K 31.5dB control 38 SUPPLY 34 39 20 LPVC VS 0.47 µF 3.74K TDA7464 T HERMAL DATA Symbol R th j-pins Thermal Resistance Junction-pins Description Ma x. Value 85 Unit °C/W ABSOLUTE MAXIMUM RATINGS Symbol VS T amb Tstg Operating Supply Voltage Operating Ambient Temperature Storage Temperature Range Parameter Value 11 -10 to 85 -55 to +150 Unit V °C °C QUICK REFERENCE DATA Symbol VS VCL THD S/N SC Supply Voltage Max. input signal handling Total Harmonic Distortion V = 1Vrms f = 1KHz Signal to Noise Ratio V out = 1Vrms (mode = OFF) Channel Separation f = 1KHz Input Attenuation Control (0.5dB) Treble Control (2db step) Middle Control (2db step) Bass Control (2dB step) Balance Control Mute Attenuation 1dB step (LCH, RCH) -31.5 -14 -14 -14 -79 100 Parameter Min. 7 2 0.01 106 90 0 +14 +14 +14 0 0.1 Typ. 9 Max. 10.2 Unit V Vrms % dB dB dB dB dB dB dB dB ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25°C, VS = 9V, RL = 10KΩ, Vin = 1Vrms; RG = 600Ω, all controls flat (G = 0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit SUPPLY VS IS SVR Supply Voltage Supply Current Ripple Rejection LCH / RCH out, Mode = OFF 60 7 9 25 80 10.2 V mA dB KΩ Vrms dB 1 32 1 3 7 1 dB dB dB mV dB dB INPUT STAGE R IN V CL ARANGE AVMIN AVMAX ASTEP VDC AVO1 AVO2 Input Resistance Clipping Level Attenuation Range Min. Attenuation Max. Attenuation Step Resolution DC Steps Voice Canceller Output 1 Voice Canceller Output 2 Adjacent att. step LIN = RIN, RIN = ON, Vmix = 0V FIX, 0dB attenuation LIN = RIN = 0V Vmix = 1Vrms FIX, 0dB attenuation -1 31 -1 -3 5 -1 THD = 0.3% 37.5 2 50 2.5 31.5 0 31.5 0.5 0 6 0 62.5 3/21 TDA7464 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit SUPPLY AVO3 RLPV Voice Canceller Output 3 Low Pass Filter Resistance LIN = -RIN, Vmix = 0V FIX, 0dB attenuation 5 24 6 32 7 40 dB KΩ BASS CONTROL Gb BSTEP RB Control Range Step Resolution Internal Feedback Resistance Max. Boost/cut +12.0 1 33 +14.0 2 44 +16.0 3 55 dB dB KΩ MIDDLE CONTROL Gm M STEP RM Control Range Step Resolution Internal Feedback Resistance Max. Boost/cut +12.0 1 18.75 +14.0 2 25 +16.0 3 31.25 dB dB KΩ TREBLE CONTROL Gt TSTEP Control Range Step Resolution Max. Boost/cut +13.0 1 +14.0 2 +15.0 3 dB dB STANDARD SURROUND SOUND MATRIX TEST CONDITION (Phase Resistor Selection D0=0, D1=1, D2=0. D3=1, D4=0, D5=1, D6=0, D7=1 Symbol GOFF Parameter In-phase Gain (OFF) Test Condition Mode OFF, Input signal of 1kHz, 1.4 Vp-p, Rin → Rout Lin → Lout Mode OFF, Input signal of 1kHz, 1.4 Vp-p R in → Rout, Lin → Lout Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p R in → Rout, Lin → Lout Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin → Rout) – (Lin → Lout) Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin → Rout), (Lin → Lout) Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 Vp-p (Rin → Rout) - (Lin → Lout) Simulated Mode, EffectCtrl = -6dB Input signal of 250Hz, 1.4 Vp-p, Rin and Lin → Lou t Simulated Mode, EffectCtrl = -6dB Input signal of 1kHz, 1.4 Vp-p, Rin and Lin → Lou t Simulated Mode, EffectCtrl = -6dB Input signal of 3.6kHz, 1.4 Vp-p, Rin and Lin → Lou t Min. -1 Typ. 0 Max. 1 Unit dB D GOFF LR In-phase Gain Difference (OFF) In-phase Gain (Movie) -1 0 1 dB GMOV 8 dB DGMOV LR In-phase Gain Difference (Movie) In-phase Gain (Music) 0 dB GMUS 7 dB D GMUS LR In-phase Gain Difference (Music) Simulated L Output 1 0 dB LMON1 4.5 dB LMON2 Simulated L Output 2 – 4.0 dB LMON3 Simulated L Output 3 7.0 dB 4/21 TDA7464 ELECTRICAL CHARACTERISTICS (continued) Symbol R MON1 Parameter Simulated R Output 1 Test Condition Simulated Mode, EffectCtrl = -6dB Input signal of 250Hz, 1.4 Vp-p, Rin and Lin →Rout Simulated Mode, EffectCtrl = -6dB Input signal of 1kHz, 1.4 Vp-p, Rin and Lin →Rout Simulated Mode, EffectCtrl = -6dB Input signal of 3.6kHz, 1.4 Vp-p, Rin and Lin → Rout Min. Typ. – 4.5 Max. Unit dB R MON2 Simulated R Output 2 3.8 dB R MON3 Simulated R Output 3 – 20 dB KΩ KΩ KΩ dB dB KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ KΩ RLP1 R HPI RLPF C RANGE SSTEP Low Pass Filter Resistance High Pass Filter Resistance LP Pin Impedance 7.5 45 7.5 10 60 10 12.5 75 12.5 STANDARD SURROUND SOUND EFFECT CONTROL Control Range Step Resolution - 21 1 -6 SURROUND SOUND MATRIX PHASE R PS10 R PS11 R PS12 R PS13 R PS20 R PS21 R PS22 R PS23 R PS30 R PS31 R PS32 R PS33 R PS40 R PS41 R PS42 R PS43 Phase Shifter 1: D1 = 0, D0 = 0 Phase Shifter 1: D1 = 0, D0 = 1 Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Phase Shifter 1: Shifter 1: Shifter 2: Shifter 2: Shifter 2: Shifter 2: Shifter 3: Shifter 3: Shifter 3: Shifter 3: Shifter 4: Shifter 4: Shifter 4: Shifter 4: D1 = D1 = D3 = D3 = D3 = D3 = D5 = D5 = D5 = D5 = D7 = D7 = D7 = D7 = 1, D0 1, D0 0, D2 0, D2 1, D2 1, D2 0, D4 0, D4 1, D4 1, D4 0, D6 0, D6 1, D6 1, D6 =0 =1 =0 =1 =0 =1 =0 =1 =0 =1 =0 =1 =0 =1 8.8 10.6 13.4 28 4.2 5.1 6.3 13.7 9 10.9 13.6 29.3 9 10.9 13.6 29.3 11.8 14.1 17.9 37.3 5.6 6.8 8.4 18.3 12.1 14.5 18.1 39.1 12.1 14.5 18.1 39.1 14.8 17.6 22.4 46.6 7 8.5 10.5 22.9 15.1 18.1 22.6 48.9 15.1 18.1 22.6 48.9 SRS SURROUND SOUND MATRIX CENTER StepC SPACE StepS PERSP1 SRS Control Range Center Step Resolution SRS Space Control Range Space Step Resolution Perspective 1 Input Signal of 125Hz SPACE = 0dB, CENTER = MUTE Rin = GND; Lin → ROUT Input Signal of 2.15KHz SPACE = 0dB, CENTER = MUTE Rin = GND; Lin → ROUT SPACE = MUTE, CENTER =0dB Rin = GND; Lin → ROUT SPACE = MUTE, CENTER = MUTE Rin = GND; Lin → LOUT Lin = GND; Rin → ROUT -31 1 -31 1 12 0 0 dB dB dB dB dB PERSP2 Perspective 2 0 dB L+R L, R L+ R SRS Curve L, R SRS Curve -8.5 -13.4 dB dB 5/21 TDA7464 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit SPEAKER & RECORD ATTENUATORS Crange SSTEP EA VDC AMUTE RVAR Control Range Step Resolution Attenuation set error DC Steps Output Mute Condition Input Impedance Av = 0 to -20dB Av = -20 to -79dB Adjacent att. steps 0.5 -1.5 -3 -3 70 22.5 79 1 0 0 0 100 30 37.5 1.5 1.5 2 3 dB dB dB dB mV dB KΩ SPEAKER ATTENUATORS V TH Zero CrossingThreshold D7 = 0 VS + 20 2 mV AUDIO OUTPUTS NO(OFF) NO(MOV) NO(MUS) NO(SIM) NO(SRS) d SC VOCL ROUT VOUT Output Noise (OFF) Output Noise (Movie) Standard Surround Sound Output Noise (Music) Standard Surround Sound Output Noise (Simulated) Standard Surround Sound Output Noise (SRS) Surround Sound Distorsion Channel Separation Clipping Level Output Resistance DC Voltage Level d = 0.3% Output Mute, Flat BW = 20Hz to 20KHz Mode = Movie , BW = 20Hz to 20KHz Mode = Music , BW = 20Hz to 20KHz, Mode = Simulated, BW = 20Hz to 20KHz BW = 20Hz to 20KHz Av = 0 ; Vin = 1Vrms 70 2 10 4 5 30 30 30 50 0.01 90 2.5 30 3.8 50 0.1 µVrms µVrms µVrms µVrms µVrms µVrms % dB Vrms Ω V BUS INPUTS V IL VIH IIN VO Input Low Voltage Input High Voltage Input Current Output Voltage SDA Acknowledge IO = 1.6mA 3 -5 +5 0.4 1 V V µA V 6/21 TDA7464 I2C BUS INTERFACE Data transmission from microprocessor to the TDA7464 and viceversa takes place through the 2 wires I2C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be connected). Data Validity As shown in fig. 3, the data on the SDA line must be stable during the high period of the clock. The HIGH and LOW state of the data line can only change when the clock signal on the SCL line is LOW. Start and Stop Conditions As shown in fig.4 a start condition is a HIGH to LOW transition of the SDA line while SCL is HIGH. The stop condition is a LOW to HIGH transition of the SDA line while SCL is HIGH. Byte Format Every byte transferred on the SDA line must contain 8 bits. Each byte must be followed by an ac2 Figure 3: Data Validity on the I CBUS knowledge bit. The MSB is transferred first. Acknowledge The master (µP) puts a resistive HIGH level on the SDA line during the acknowledge clock pulse (see fig. 5). The peripheral (audioprocessor) that acknowledges has to pull-down (LOW) the SDA line during this clock pulse. The audioprocessor which has been addressed has to generate an acknowledge after the reception of each byte, otherwise the SDA line remains at the HIGH level during the ninth clock pulse time. In this case the master transmitter can generate the STOP information in order to abort the transfer. Transmission without Acknowledge Avoiding to detect the acknowledge of the audioprocessor, the µP can use a simpler transmission: simply it waits one clock without checking the slave acknowledging, and sends the new data. This approach of course is less protected from misworking. Figure 4: Timing Diagram of I2CBUS F igure 5: Acknowledge on the I2CBUS 7/21 TDA7464 SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7464 address A subaddress bytes A sequence of data (N byte + achnowledge) A stop condition (P) CHIP ADDRESS MSB S 1 0 0 0 0 0 A LSB 0 ACK MSB B SUBADDRESS LSB DATA ACK MSB DATA 1 to DATA n LSB DATA ACK P D95AU226A ACK = Achnowledge S = Start P = Stop A = Address B = Auto Increment EXAMPLES No Incremental Bus The TDA7464 receives a start condition, the cor- rect chip address, a subaddress with the MSB = 0 (no incremental bus), N-data (all these data concern the subaddress selected), a stop condition. CHIP ADDRESS MSB S 1 0 0 0 0 0 A LSB 0 ACK MSB 0 X SUBADDRESS LSB X X D3 D2 D1 D0 ACK MSB DATA LSB DATA ACK P D95AU306 Incremental Bus The TDA7464 receives a start condition, the correct chip address, a subaddress with the MSB = 1 (incremental bus): now it is in a loop condition with an autoincrease of the subaddress whereas SUBADDRESS from ”1XXX1010” to ”1XXX1111” of DATA are ignored. The DATA 1 concerns thesubaddress sent, and the DATA 2 concerns the subaddress sent plus one in the loop etc. and, at the end, it receives the stop condition. CHIP ADDRESS MSB S 1 0 0 0 0 0 A LSB 0 ACK MSB 1 X SUBADDRESS LSB X X D3 D2 D1 D0 ACK MSB DATA 1 to DATA n LSB DATA ACK P D95AU307 8/21 TDA7464 DATA BYTES (Address = 80(HEX)): FUNCTION SELECTION: The first byte (subaddress) MSB D7 B B B B B B B B B B B B D6 X X X X X X X X X X X X D5 X X X X X X X X X X X X D4 X X X X X X X X X X X X D3 0 0 0 0 0 0 0 0 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 D1 0 0 1 1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 INPUT ATTENUATION SURROUND & OUT & EFFECT CONTROL PHASE RESISTOR BASS MIDDLE & TREBLE SPEAKER ATTENUATION ”L” SPEAKER ATTENUATION ”R” RECORD ATTENUATION ”L” RECORD ATTENUATION”R” INPUT MULTIPLEXER, VOICE CANCELLER & REC OUT SRS / SPACE ATTENUATION SRS / CENTER ATTENUATION SUBADDRESS B = 1 INCREMENTAL BUS; ACTIVE B = 0 NO INCREMENTAL BUS; X = DON’T CARE INPUT ATTENUATION SELECTION M SB D7 D6 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 INPUT ATTENUATION 0.5 dB STEPS 0 -0.5 -1 -1.5 -2 -2.5 -3 -3.5 4 dB STEPS 0 -4 -8 -12 -16 -20 -24 -28 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 INPUT ATTENUATION = 0 ∼ -31.5dB 9/21 TDA7464 STANDARD SURROUND SELECTION M SB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 LSB D0 0 1 0 1 SURROUND MODE SIMULATED MUSIC OFF MOVIE OUT VAR FIX EFFECT CONTROL -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 PHASE RESISTOR SELECTION MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 LSB D0 0 1 0 1 SURROUND PHASE RESISTOR PHASE SHIFT 1 (KΩ) 12 14 18 37 PHASE SHIFT 2 (KΩ) 6 7 8 18 PHASE SHIFT 3 (KΩ) 12 14 18 39 PHASE SHIFT 4 (KΩ) 12 14 18 39 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 10/21 TDA7464 BASS SELECTION MSB D7 D6 D5 D4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 D1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 LSB D0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 BASS 2 dB STEPS -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14 11/21 TDA7464 MIDDLE & TREBLE SELECTION MSB D7 D6 D5 D4 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 D1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 LSB D0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 MIDDLE 2 dB STEPS -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14 TREBLE 2 dB STEPS 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14 12/21 TDA7464 LEFT CHANNEL SPEAKER ATTENUATION SELECTION MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPEAKER/RECORD ATT 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 -32 -40 -48 -56 -64 -72 MUTE 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 0 1 1 0 0 1 X 0 1 0 1 0 1 0 1 0 1 X X LEFT & RIGHT CHANNELS BOTH MSB D7 0 1 D6 D5 D4 D3 D2 D1 LSB D0 ZERO CROSS ATT. MODE 1 dB STEPS ON OFF X = DON’T CARE SPEAKER/RECORD ATTENUATION = 0dB ∼ -79dB 13/21 TDA7464 RECORD AND RIGHT CHANNEL SPEAKER ATTENUATION SELECTION MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPEAKER/RECORD ATT 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 -32 -40 -48 -56 -64 -72 MUTE 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 0 1 1 0 0 1 X 0 1 0 1 0 1 0 1 0 1 X X X = DON’T CARE SPEAKER/RECORD ATTENUATION = 0dB ∼ -79dB VOICE CANCELLER/INPUT/RECOUT L & R SELECTION MSB D7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 D6 D5 D4 D3 D2 D1 LSB D0 0 1 VOICE CANCELLER OFF ON INPUT MULTIPLEXER IN_2 IN_3 IN_4 IN_1 REC OUT ”L” VAR 1 (3BAND) VAR 2 (SURR) VAR 3 (REAR) FIX REC OUT ”R” VAR 1(3BAND) VAR 2 (SURR) VAR 3 (REAR) FIX 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 14/21 TDA7464 SRS SPACE CONTROL: ATTENUATION SELECTION MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPACE ATTENUATION 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 MUTE 0 0 0 0 1 0 0 1 1 X 0 1 0 1 X X X X X = DON’T CARE SPEAKER/RECORD ATTENUATION = 0dB ∼ -31dB SRS CENTER CONTROL: ATTENUATION SELECTION MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 CENTER ATTENUATION 1 dB STEPS 0 -1 -2 -3 -4 -5 -6 -7 8 dB STEPS 0 -8 -16 -24 MUTE SRS INPUT NO SURROUND SIGNAL SURROUND SIGNAL SRS SWITCH SRS ON SRS OFF 0 0 0 0 1 0 1 0 1 0 0 1 1 X 0 1 0 1 X X X X X = DON’T CARE SPACE ATTENUATION = 0dB ∼ -31dB RECOMMENDED TO ATTENUATE -3dB IN INPUT ATTENUATION DURING ”SRS OFF” TO FULFILL SRS BYPASS MODE WHEN SRS FUNCTION IS USED 15/21 TDA7464 POWER ON RESET SURROUND & OUT CONTROL+ EFFECT CONTROL SPEAKER/RECORD ATTENUATION L &R MODE INPUT ATTENUATION + REAR SWITCH VOICE CANCELLER INPUT MIX SWITCH SRS SURROUND BASS & MIDDLE TREBLE OFF + FIX + MAX ATTENUATION MUTE + ZERO CROSS ATT.OFF MAX ATTENUATION + ON OFF IN1 NO MIX PIN OFF + MAX ATTENUATION 2dB 0dB PIN DESCRIPTION PINS: L-OUT, R-OUT, RECOUT-L, RECOUT-R VS PIN: HP1 LP1 10Ω VS 10K GND 20µA GND 60K GND D94AU198 HP2 D96AU477 GND PIN: HP2 PIN: L-IN1, R-IN1, L-IN2, R-IN2, L-IN3, R-IN3, L-IN4, R-IN4, VS 20µA 5.5K 60K GND D94AU199 VS 20 µA 50K 5.5K HP1 GND VREF D94AU200 16/21 TDA7464 PIN: VAR-L, VAR-R, PIN: CREF VS 20µA VS 20K 42K 20µA SW 30K GND Vref D95AU227 20K D95AU336 GND PIN: LP1 VS 20µA PIN: SCL, SDA 20µA 10K GND HP1 D94AU211 GND D94AU205 PIN: PS1, PS2, PS3, PS4, LP PIN: NETW2 VS 20µA VS 20µA GND D95AU308 GND D96AU473 17/21 TDA7464 PIN: BASSO-L, BASSO-R, NETW1 VS VS PIN: BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI, 20µA 20µA GND BASS-LO 45K : Bass or 25K : MIDDLE D95AU231A GND D95AU230 BASS-RO,MIDDLE-LO,MIDDLE-RO PIN: BASS-LO,BASS-RO,MIDDLE-LO, MIDDLE-RO, PIN: TREBLE-L, TREBLE-R VS VS 20 µA 20µA (*) GND BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI (*) 45K : Bass 25K : MIDDLE D95AU309 D95AU232 25K GND PIN: VOUT REF VS PIN: NBLIN, NBRIN VS 20µA 20µA GND D95AU233A 10K GND GND D95AU234 SW 18/21 TDA7464 PIN: NBLO, NBRO VS VREF GND D95AU235A 19/21 TDA7464 mm MIN. A A1 A2 B C D D1 D3 e E E1 E3 0.05 1.35 0.30 0.09 12.00 10.00 8.00 0.80 12.00 10.00 8.00 1.40 0.37 TYP. MAX. 1.60 0.15 1.45 0.45 0.20 0.002 0.053 0.012 0.004 0.472 0.394 0.315 0.031 0.472 0.394 0.315 0.055 0.014 MIN. inch TYP. MAX. 0.063 0.006 0.057 0.018 0.008 DIM. D D1 D3 A1 33 34 23 22 0.10mm .004 Seating Plane A A2 E3 E1 B 44 1 11 12 E B C L K e L1 TF4 Q4 P 20/21 TDA7464 I nformation furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as criticalcomponents in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. © 1998 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved The Sound Retrieval System and are registered trademarks of SRS Labs, Inc. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 21/21