STMICROELECTRONICS 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.
TQFP44
ORDERING NUMBER: TDA7464
LPVC
R_IN2
R_IN3
R_IN4
CREF
VS
PS4
PS3
PS2
PS1
PIN CONNECTION
LP
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
44 43 42 41 40 39 38 37 36 35 34
LP1
1
33
R_IN1
HP1
2
32
VREFOUT
HP2
3
31
L_IN1
NETW1
4
30
L_IN2
NETW2
5
29
L_IN3
VAR_L
6
28
L_IN4
BASSO_L
7
27
RECOUT_L
VAR_R
8
26
RECOUT_R
BASSO_R
9
25
L_OUT
BASS_LO
10
24
R_OUT
BASS_LI
11
23
DIG_GND
February 1998
SCL
SDA
AGND
TREBLE_L
TREBLE_R
MIDDLE_RI
MIDDLE_RO
MIDDLE_LI
MIDDLE_LO
BASS_RI
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
BASS_RO
12 13 14 15 16 17 18 19 20 21 22
D96AU483C
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.
1/21
R-IN4
0.22µF
R-IN3
0.22µF
R-IN2
0.22µF
R-IN1
0.22µF
L-IN4
0.22µF
L-IN3
0.22µF
L-IN2
0.22µF
L-IN1
0.22µF
37
36
35
33
28
29
30
31
50K
50K
50K
50K
50K
50K
50K
50K
31.5dB
control
34
100nF
LPVC
39
LPF
-
+
VS
RLP1 RHP1
3
1
31.5dB control
2
HP1
20
+
+
VOICE
ON
R6
38
SUPPLY
+
-
R5
HP2
AGND
LP1
22µF
32
V REF
VREFOUT
+
+
L-R
100K
MIX SW
+
-
+
-
MIX SW
32.4K
4.42K
0.47µF
130K
1K
0.47µF
4
CENTER
NETW1
5
1.5K
OFF
MOVIE/
SIM
PS3
400Hz
RPS3
41
NETW2
STEREO
SRS
EFFECT
CONTROL
MUSIC
PS2
4KHz
RPS2
42
PS3
22nF
44
LPF
9KHz
43
PS2
4.7nF
LP
1.2nF
MOVIE/
MUSIC
SIM
PS1
90Hz
RPS1
PS1
100nF
SURR
MIXING
AMP
3.74K
47.5K
SRS
FIX
MIXING
AMP
40
SPACE
PS4
400Hz
RPS4
PS4
22nF
4.7nF
SRS
5.6nF
14
22nF
2.7K
18nF
22nF
RM
16
MIDDLE
TREBLE
18
MIDDLE
17
15
RM
2.7K
18nF
TREBLE
TREBLE-R
FIX
SURR
19
TREBLE-L
5.6nF
MIDDLE-LI
MIDDLE-RI
680nF
5.6K
100nF
3BAND
BASS-RO
FIX
100nF
RB
12
3BAND
FIX
MUTE
REC
ATT
79dB CONTROL
BASSO-R
79dB CONTROL
MUTE
REC
ATT
7
9
6
30K
VAR
FIX
FIX
VAR
30K
VAR-L
VAR-R
8
2.2µF
2.2µF
BASSO-L
I2 C BUS DECODER + LATCHES
SURR
REAR
REAR
BASS
13
RB
10
SURR
BASS
11
BASS-LO
100nF
BASS-LI
5.6K
100nF
BASS-RI
MIDDLE-LO
MIDDLE-RO
2/21
5.6nF
-
-
+
+
N.B. SW
MUTE
26
24
23
21
22
25
27
RECOUT-R
R-OUT
DIG_GND
SDA
SCL
L-OUT
RECOUT-L
D96AU481D
SPKR
ATT
79dB CONTROL
MUTE
SPKR
ATT
79dB CONTROL
N.B. SW
TDA7464
BLOCK DIAGRAM
CREF
TDA7464
THERMAL DATA
Symbol
R th j-pins
Description
Thermal Resistance Junction-pins
Value
Unit
85
°C/W
Ma x.
ABSOLUTE MAXIMUM RATINGS
Symbol
VS
Parameter
Value
Operating Supply Voltage
T amb
Operating Ambient Temperature
Tstg
Storage Temperature Range
Unit
11
V
-10 to 85
°C
-55 to +150
°C
QUICK REFERENCE DATA
Symbol
VS
Min.
Typ.
Max.
Unit
Supply Voltage
Parameter
7
9
10.2
V
2
0.1
VCL
Max. input signal handling
THD
Total Harmonic Distortion V = 1Vrms f = 1KHz
0.01
S/N
Signal to Noise Ratio V out = 1Vrms (mode = OFF)
106
SC
Channel Separation f = 1KHz
(2db step)
Middle Control (2db step)
Bass Control (2dB step)
Balance Control
1dB step (LCH, RCH)
%
dB
90
Input Attenuation Control (0.5dB)
Treble Control
Vrms
dB
-31.5
0
dB
-14
+14
dB
-14
+14
dB
-14
+14
dB
-79
0
dB
Mute Attenuation
100
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.
9
10.2
Unit
SUPPLY
VS
Supply Voltage
IS
Supply Current
SVR
Ripple Rejection
7
LCH / RCH out, Mode = OFF
60
V
25
mA
80
dB
INPUT STAGE
R IN
Input Resistance
V CL
Clipping Level
ARANGE
THD = 0.3%
37.5
50
2
2.5
Vrms
31.5
dB
Attenuation Range
62.5
KΩ
AVMIN
Min. Attenuation
-1
0
1
AVMAX
Max. Attenuation
31
31.5
32
dB
dB
ASTEP
Step Resolution
-1
0.5
1
dB
VDC
DC Steps
Adjacent att. step
-3
0
3
mV
AVO1
Voice Canceller Output 1
LIN = RIN, RIN = ON,
Vmix = 0V FIX, 0dB attenuation
5
6
7
dB
AVO2
Voice Canceller Output 2
LIN = RIN = 0V Vmix = 1Vrms FIX,
0dB attenuation
-1
0
1
dB
3/21
TDA7464
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
5
6
7
dB
24
32
40
KΩ
+12.0
+14.0
+16.0
dB
SUPPLY
AVO3
Voice Canceller Output 3
RLPV
Low Pass Filter Resistance
LIN = -RIN, Vmix = 0V FIX,
0dB attenuation
BASS CONTROL
Gb
BSTEP
RB
Control Range
Max. Boost/cut
Step Resolution
1
2
3
dB
Internal Feedback Resistance
33
44
55
KΩ
+12.0
+14.0
+16.0
dB
1
2
3
dB
18.75
25
31.25
KΩ
+13.0
+14.0
+15.0
dB
1
2
3
dB
MIDDLE CONTROL
Gm
M STEP
RM
Control Range
Max. Boost/cut
Step Resolution
Internal Feedback Resistance
TREBLE CONTROL
Gt
TSTEP
Control Range
Max. Boost/cut
Step Resolution
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
Parameter
Test Condition
Min.
Typ.
Max.
Unit
GOFF
In-phase Gain (OFF)
Mode OFF, Input signal of
1kHz, 1.4 Vp-p, Rin → Rout
Lin → Lout
-1
0
1
dB
D GOFF
LR In-phase Gain Difference
(OFF)
Mode OFF, Input signal of
1kHz, 1.4 Vp-p
R in → Rout, Lin → Lout
-1
0
1
dB
GMOV
In-phase Gain (Movie)
DGMOV
LR In-phase Gain Difference
(Movie)
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)
GMUS
In-phase Gain (Music)
D GMUS
8
dB
0
dB
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
(Rin → Rout), (Lin → Lout)
7
dB
LR In-phase Gain Difference
(Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 Vp-p
(Rin → Rout) - (Lin → Lout)
0
dB
LMON1
Simulated L Output 1
Simulated Mode, EffectCtrl = -6dB
Input signal of 250Hz,
1.4 Vp-p, Rin and Lin → Lou t
4.5
dB
LMON2
Simulated L Output 2
Simulated Mode, EffectCtrl = -6dB
Input signal of 1kHz,
1.4 Vp-p, Rin and Lin → Lou t
– 4.0
dB
LMON3
Simulated L Output 3
Simulated Mode, EffectCtrl = -6dB
Input signal of 3.6kHz,
1.4 Vp-p, Rin and Lin → Lou t
7.0
dB
4/21
TDA7464
ELECTRICAL CHARACTERISTICS (continued)
Symbol
R MON1
Parameter
Simulated R Output 1
R MON2
Simulated R Output 2
R MON3
Simulated R Output 3
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
3.8
dB
– 20
dB
RLP1
R HPI
Low Pass Filter Resistance
High Pass Filter Resistance
7.5
45
10
60
12.5
75
KΩ
KΩ
RLPF
LP Pin Impedance
7.5
10
12.5
KΩ
-6
dB
dB
STANDARD SURROUND SOUND EFFECT CONTROL
C RANGE
SSTEP
Control Range
Step Resolution
- 21
1
SURROUND SOUND MATRIX PHASE
R PS10
R PS11
Phase Shifter 1: D1 = 0, D0 = 0
Phase Shifter 1: D1 = 0, D0 = 1
8.8
10.6
11.8
14.1
14.8
17.6
KΩ
KΩ
R PS12
R PS13
R PS20
R PS21
R PS22
R PS23
R PS30
Phase
Phase
Phase
Phase
Phase
Phase
Phase
Shifter 1:
Shifter 1:
Shifter 2:
Shifter 2:
Shifter 2:
Shifter 2:
Shifter 3:
D1 =
D1 =
D3 =
D3 =
D3 =
D3 =
D5 =
1, D0
1, D0
0, D2
0, D2
1, D2
1, D2
0, D4
=0
=1
=0
=1
=0
=1
=0
13.4
28
4.2
5.1
6.3
13.7
9
17.9
37.3
5.6
6.8
8.4
18.3
12.1
22.4
46.6
7
8.5
10.5
22.9
15.1
KΩ
KΩ
KΩ
KΩ
KΩ
KΩ
KΩ
R PS31
R PS32
R PS33
R PS40
R PS41
R PS42
R PS43
Phase
Phase
Phase
Phase
Phase
Phase
Phase
Shifter 3:
Shifter 3:
Shifter 3:
Shifter 4:
Shifter 4:
Shifter 4:
Shifter 4:
D5 =
D5 =
D5 =
D7 =
D7 =
D7 =
D7 =
0, D4
1, D4
1, D4
0, D6
0, D6
1, D6
1, D6
=1
=0
=1
=0
=1
=0
=1
10.9
13.6
29.3
9
10.9
13.6
29.3
14.5
18.1
39.1
12.1
14.5
18.1
39.1
18.1
22.6
48.9
15.1
18.1
22.6
48.9
KΩ
KΩ
KΩ
KΩ
KΩ
KΩ
KΩ
0
dB
SRS SURROUND SOUND MATRIX
CENTER
StepC
SPACE
SRS Control Range
-31
Center Step Resolution
1
SRS Space Control Range
StepS
Space Step Resolution
PERSP1
Perspective 1
PERSP2
-31
dB
0
dB
1
dB
Input Signal of 125Hz
SPACE = 0dB, CENTER = MUTE
Rin = GND; Lin → ROUT
12
dB
Perspective 2
Input Signal of 2.15KHz
SPACE = 0dB, CENTER = MUTE
Rin = GND; Lin → ROUT
0
dB
L+R
L+ R SRS Curve
SPACE = MUTE, CENTER =0dB
Rin = GND; Lin → ROUT
-8.5
dB
L, R
L, R SRS Curve
SPACE = MUTE,
CENTER = MUTE
Rin = GND; Lin → LOUT
Lin = GND; Rin → ROUT
-13.4
dB
5/21
TDA7464
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
1
1.5
dB
SPEAKER & RECORD ATTENUATORS
Crange
Control Range
SSTEP
Step Resolution
EA
VDC
Attenuation set error
DC Steps
AMUTE
Output Mute Condition
RVAR
Input Impedance
79
0.5
Av = 0 to -20dB
dB
-1.5
0
1.5
dB
Av = -20 to -79dB
-3
0
2
dB
Adjacent att. steps
-3
0
3
mV
70
100
22.5
30
37.5
KΩ
dB
SPEAKER ATTENUATORS
V TH
Zero CrossingThreshold
D7 = 0
VS
+ 20
2
mV
AUDIO OUTPUTS
NO(OFF)
Output Noise (OFF)
Output Mute, Flat
BW = 20Hz to 20KHz
4
5
µVrms
µVrms
NO(MOV)
Output Noise (Movie) Standard
Surround Sound
Mode = Movie ,
BW = 20Hz to 20KHz
30
µVrms
NO(MUS)
Output Noise (Music) Standard
Surround Sound
Mode = Music ,
BW = 20Hz to 20KHz,
30
µVrms
NO(SIM)
Output Noise (Simulated)
Standard Surround Sound
Mode = Simulated,
BW = 20Hz to 20KHz
30
µVrms
NO(SRS)
Output Noise (SRS)
Surround Sound
BW = 20Hz to 20KHz
50
µVrms
d
Distorsion
Av = 0 ; Vin = 1Vrms
0.01
SC
Channel Separation
VOCL
Clipping Level
ROUT
Output Resistance
VOUT
DC Voltage Level
d = 0.3%
0.1
%
70
90
dB
2
2.5
Vrms
10
30
50
3.8
Ω
V
BUS INPUTS
6/21
V IL
Input Low Voltage
VIH
Input High Voltage
IIN
Input Current
VO
Output Voltage SDA
Acknowledge
1
3
-5
IO = 1.6mA
V
V
+5
µA
0.4
V
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 ac-
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.
2
Figure 3: Data Validity on the I CBUS
Figure 4: Timing Diagram of I2CBUS
Figure 5: Acknowledge on the I2CBUS
7/21
TDA7464
address
A subaddress bytes
A sequence of data (N byte + achnowledge)
A stop condition (P)
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (S)
A chip address byte, containing the TDA7464
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
0
0
0
0
0
A
0
MSB
ACK
DATA 1 to DATA n
LSB
B
DATA
MSB
ACK
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-
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
0
0
0
0
0
rect chip address, a subaddress with the MSB = 0
(no incremental bus), N-data (all these data concern the subaddress selected), a stop condition.
A
0
MSB
ACK
0
DATA
LSB
X
X
MSB
X D3 D2 D1 D0 ACK
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
CHIP ADDRESS
SUBADDRESS
MSB
S
1
LSB
0
0
0
D95AU307
8/21
0
0
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.
A
0
MSB
ACK
1
DATA 1 to DATA n
LSB
X
X
X D3 D2 D1 D0 ACK
MSB
LSB
DATA
ACK
P
TDA7464
DATA BYTES (Address = 80(HEX)):
FUNCTION SELECTION:
The first byte (subaddress)
MSB
LSB
SUBADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
B
X
X
X
0
0
0
0
INPUT ATTENUATION
B
X
X
X
0
0
0
1
SURROUND & OUT & EFFECT
CONTROL
B
X
X
X
0
0
1
0
PHASE RESISTOR
B
X
X
X
0
0
1
1
BASS
B
X
X
X
0
1
0
0
MIDDLE & TREBLE
B
X
X
X
0
1
0
1
SPEAKER ATTENUATION ”L”
B
X
X
X
0
1
1
0
SPEAKER ATTENUATION ”R”
B
X
X
X
0
1
1
1
RECORD ATTENUATION ”L”
B
X
X
X
1
0
0
0
RECORD ATTENUATION”R”
B
X
X
X
1
0
0
1
INPUT MULTIPLEXER, VOICE
CANCELLER & REC OUT
B
X
X
X
1
0
1
0
SRS / SPACE ATTENUATION
B
X
X
X
1
0
1
1
SRS / CENTER ATTENUATION
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
D5
D4
D3
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
LSB
INPUT ATTENUATION
D0
0
1
0
1
0
1
0
1
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
INPUT ATTENUATION = 0 ∼ -31.5dB
9/21
TDA7464
STANDARD SURROUND SELECTION
MSB
D7
LSB
D6
D5
D4
D3
D2
D1
0
0
1
1
D0
0
1
0
1
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
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
PHASE RESISTOR SELECTION
MSB
D7
LSB
D6
D5
0
0
1
1
0
0
1
1
10/21
0
1
0
1
D4
0
1
0
1
D3
D2
0
0
1
1
0
1
0
1
D1
0
0
1
1
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
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
BASS
D0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
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
LSB
MIDDLE
D3
D2
D1
D0
2 dB STEPS
0
0
0
0
-14
0
0
0
1
-12
0
0
1
0
-10
0
0
1
1
-8
0
1
0
0
-6
0
1
0
1
-4
0
1
1
0
-2
0
1
1
1
0
1
1
1
1
0
1
1
1
0
2
1
1
0
1
4
1
1
0
0
6
1
0
1
1
8
1
0
1
0
10
1
0
0
1
12
1
0
0
0
14
TREBLE
2 dB STEPS
0
0
0
0
-14
0
0
0
1
-12
0
0
1
0
-10
0
0
1
1
-8
0
1
0
0
-6
0
1
0
1
-4
0
1
1
0
-2
0
1
1
1
0
1
1
1
1
0
1
1
1
0
2
1
1
0
1
4
1
1
0
0
6
1
0
1
1
8
1
0
1
0
10
1
0
0
1
12
1
0
0
0
14
12/21
TDA7464
LEFT CHANNEL SPEAKER ATTENUATION SELECTION
MSB
D7
D6
D5
D4
D3
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
X
X
X
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
LSB
SPEAKER/RECORD ATT
D0
0
1
0
1
0
1
0
1
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
LSB
ZERO CROSS ATT. MODE
D0
1 dB STEPS
ON
OFF
LEFT & RIGHT CHANNELS BOTH
MSB
D7
0
1
D6
D5
D4
D3
D2
D1
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
0
0
0
0
0
0
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
1
1
0
1
1
X
X
X
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
LSB
SPEAKER/RECORD ATT
D0
0
1
0
1
0
1
0
1
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
X = DON’T CARE
SPEAKER/RECORD ATTENUATION = 0dB ∼ -79dB
VOICE CANCELLER/INPUT/RECOUT L & R SELECTION
MSB
D7
1
1
LSB
D4
D3
D2
D1
1
1
1
1
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
1
1
1
1
0
0
1
1
0
1
0
1
1
1
1
1
14/21
D6
0
0
1
1
D5
0
1
0
1
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
TDA7464
SRS SPACE CONTROL: ATTENUATION SELECTION
MSB
D7
D6
D5
D4
D3
0
0
0
0
0
0
1
1
0
1
0
1
1
X
X
LSB
SPACE ATTENUATION
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
1 dB STEPS
0
-1
-2
-3
-4
-5
-6
-7
8 dB STEPS
0
-8
-16
-24
MUTE
X
X
X
X = DON’T CARE
SPEAKER/RECORD ATTENUATION = 0dB ∼ -31dB
SRS CENTER CONTROL: ATTENUATION SELECTION
MSB
D7
D6
0
1
0
1
D5
D4
D3
0
0
0
0
0
0
1
1
0
1
0
1
1
X
X
LSB
CENTER ATTENUATION
1 dB STEPS
0
-1
-2
-3
-4
-5
-6
-7
8 dB STEPS
0
-8
-16
-24
MUTE
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
X
X
X
SRS INPUT
NO SURROUND SIGNAL
SURROUND SIGNAL
SRS SWITCH
SRS ON
SRS OFF
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
OFF + FIX + MAX ATTENUATION
SPEAKER/RECORD ATTENUATION L &R MODE
MUTE + ZERO CROSS ATT.OFF
INPUT ATTENUATION + REAR SWITCH
MAX ATTENUATION + ON
VOICE CANCELLER
OFF
INPUT
IN1
MIX SWITCH
NO MIX PIN
SRS SURROUND
OFF + MAX ATTENUATION
BASS & MIDDLE
2dB
TREBLE
0dB
PIN DESCRIPTION
PINS: L-OUT, R-OUT, RECOUT-L, RECOUT-R
PIN: HP1
VS
LP1
VS
10K
10Ω
GND
GND
20µA
60K
HP2
GND
D94AU198
GND
D96AU477
PIN: HP2
PIN: L-IN1, R-IN1, L-IN2, R-IN2, L-IN3, R-IN3,
L-IN4, R-IN4,
VS
VS
20µA
20µA
5.5K
60K
HP1
GND
5.5K
D94AU199
16/21
50K
GND
VREF
D94AU200
TDA7464
PIN: VAR-L, VAR-R,
PIN: CREF
VS
VS
20µA
20µA
20K
42K
SW
30K
20K
GND Vref
D95AU336
D95AU227
GND
PIN: SCL, SDA
PIN: LP1
VS
20µA
20µA
10K
GND
GND
HP1
D94AU205
D94AU211
PIN: PS1, PS2, PS3, PS4, LP
PIN: NETW2
VS
VS
20µA
20µA
GND
GND
D96AU473
D95AU308
17/21
TDA7464
PIN: BASSO-L, BASSO-R, NETW1
PIN: BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI,
VS
VS
20µA
20µA
45K : Bass
or
25K : MIDDLE
GND
BASS-LO
GND
BASS-RO,MIDDLE-LO,MIDDLE-RO
D95AU231A
D95AU230
PIN: BASS-LO,BASS-RO,MIDDLE-LO, MIDDLE-RO,
PIN: TREBLE-L, TREBLE-R
VS
VS
20µA
20µA
(*)
25K
GND
BASS-LI,BASS-RI,MIDDLE-LI,MIDDLE-RI
GND
D95AU232
(*) 45K : Bass
25K : MIDDLE
D95AU309
PIN: VOUT REF
PIN: NBLIN, NBRIN
VS
VS
20µA
20µA
GND
D95AU233A
10K
GND
18/21
GND
D95AU234
SW
TDA7464
PIN: NBLO, NBRO
VS
VREF
GND
D95AU235A
19/21
TDA7464
mm
DIM.
MIN.
inch
TYP.
MAX.
A
MIN.
TYP.
MAX.
1.60
A1
0.05
A2
1.35
B
0.30
C
0.09
0.063
0.15
0.002
0.006
1.40
1.45
0.053
0.055
0.057
0.37
0.45
0.012
0.014
0.018
0.20
0.004
0.008
D
12.00
0.472
D1
10.00
0.394
D3
8.00
0.315
e
0.80
0.031
E
12.00
0.472
E1
10.00
0.394
E3
8.00
0.315
D
D1
A
D3
A2
A1
33
23
34
22
0.10mm
.004
B
E
E1
B
E3
Seating Plane
12
44
11
1
C
L
L1
e
K
TQFP44
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.
 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