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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 0.47F NETW2 44 5 STEREO SRS
0.22F
LPF
+
VOICE ON
MIX SW
SRS
AGND
CREF
VREFOUT
MIDDLE-RI
18nF 2.7K
22nF
MIDDLE-RO
100nF
22F
BASS-RI
2/21
100nF 2.2F 4.7nF 22nF 22nF 5.6nF 2.7K 18nF 22nF 100nF 5.6K 100nF PS1 43 MIX SW RPS1 FIX 30K + 27 79dB CONTROL SURR REC ATT VAR REAR MUTE 3BAND 79dB CONTROL + FIX SPKR ATT MUTE RPS2 RPS3 RPS4 RM RB 42 41 40 19 15 14 11 10 7 6 N.B. SW PS2 PS3 PS4 TREBLE-L BASS-LI BASS-LO BASSO-L VAR-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 9 8 VAR-R
D96AU481D
TDA7464
BLOCK DIAGRAM
5.6nF
680nF
LP1
HP1
HP2
0.22F
31
1 31.5dB control
2
3
L-IN1
50K
0.22F
30
RLP1 RHP1
L-IN2
50K
0.22F
29
R5
L-IN3
50K
-
0.22F
28
+
L-IN4
50K
0.22F
33
+
R-IN1
50K EFFECT CONTROL MIXING AMP 79dB CONTROL SPKR ATT VAR MUTE 26
0.22F
35
+
R-IN2
50K
-
0.22F
36
24
R-IN3
R-OUT
37
R-IN4
RECOUT-R
50K
31.5dB control 38
SUPPLY
34
39
20
LPVC
VS
2.2F 100nF 5.6K 100nF
0.47F
3.74K
TDA7464
THERMAL 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 = 25C, VS = 9V, RL = 10K, Vin = 1Vrms; RG = 600, 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
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 1 32 1 3 7 1 62.5 K Vrms dB dB dB dB mV dB dB
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 K
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 K
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 K
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
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
K K K
STANDARD SURROUND SOUND EFFECT CONTROL
Control Range Step Resolution - 21 1 -6 dB dB
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 K K K K K K K K K K K K K K K K
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 K
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 Vrms Vrms Vrms Vrms Vrms Vrms % dB Vrms 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 A 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 (P) 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 P 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
Figure 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
MSB 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
MSB 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 (K) 12 14 18 37 PHASE SHIFT 2 (K) 6 7 8 18 PHASE SHIFT 3 (K) 12 14 18 39 PHASE SHIFT 4 (K) 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
10
VS 10K
GND
20A
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 20A 5.5K 60K GND
D94AU199
VS 20A
50K
5.5K
HP1
GND
VREF
D94AU200
16/21
TDA7464
PIN: VAR-L, VAR-R, PIN: CREF
VS
20A
VS
20K 42K
20A
SW
30K GND Vref
D95AU227
20K
D95AU336
GND
PIN: LP1
VS 20A
PIN: SCL, SDA
20A
10K GND HP1
D94AU211
GND
D94AU205
PIN: PS1, PS2, PS3, PS4, LP
PIN: NETW2
VS 20A
VS 20A
GND
D95AU308
GND
D96AU473
17/21
TDA7464
PIN: BASSO-L, BASSO-R, NETW1 VS
VS
PIN: BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI,
20A
20A
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
20A
20A
(*) 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
20A
20A
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
Information 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. (c) 1998 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved The Sound Retrieval System and are registered trademarks of SRS Labs, Inc.
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