OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

E-TDA7342NTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
TDA7342 Software specification
13/20
4.3 Transmitted data
ZM = Zero crossing muted (HIGH active)
SM = Soft mute activated (HIGH active)
X = Not used
The transmitted data is automatically updated after each ACK.
Transmission can be repeated without new chip address.
4.4 Data byte specification
X = not relevant; set to "1" during testing
For example to select the IN 2 input with a gain of 7.5dB the Data Byte is: X X 1 0 1 0 0 1
Table 6. Send mode
MSB LSB
X X X X X SM ZM X
Table 7. Input selector
MSB LSB
Function
D7 D6
D5 D4 D3 D2 D1 D0
0 1 0 0 0 not used
0 1 0 0 1 IN 2
0 1 0 1 0 IN 1
0 1 0 1 1 AM mono
0 1 1 0 0 not used
0 1 1 0 1 not used
0 1 1 1 0 not allowed
0 1 1 1 1 not allowed
0 1 0 0 11.25dB gain
0 1 0 1 7.5dB gain
0 1 1 0 3.75dB gain
0 1 1 1 0dB gain
0 0dB differential input gain (IN3)
1 -6dB differential input gain (IN3)
Software specification TDA7342
14/20
For example to select -17.5dB attenuation, loudness OFF, the Data Byte is: X X X1 1 1 1 0
Table 8. Loudness
MSB LSB
Function
D7 D6
D5 D4 D3 D2 D1 D0
X X X 0 0 0 0 0 0dB
X X X 0 0 0 0 1 -1.25dB
X X X 0 0 0 1 0 -2.5dB
X X X 0 0 0 1 1 -3.75dB
X X X 0 0 1 0 0 -5dB
X X X 0 0 1 0 1 -6.25dB
X X X 0 0 1 1 0 -7.5dB
X X X 0 0 1 1 1 -8.75dB
X X X 0 1 0 0 0 -10dB
X X X 0 1 0 0 1 -11.25dB
X X X 0 1 0 1 0 -12.5dB
X X X 0 1 0 1 1 -13.75dB
X X X 0 1 1 0 0 -15dB
X X X 0 1 1 0 1 -16.25dB
X X X 0 1 1 1 0 -17.5dB
X X X 0 1 1 1 1 -18.75dB
X X X 1 D3 D2 D1 D0 Loudness OFF
(1)
1. If the loudness is switched OFF, the loudness stage is acting like a volume attenuator with flat frequency
response. D0 to D3 determine the attenuation level.
Table 9. Mute
MSB LSB
Function
D7 D6
D5 D4 D3 D2 D1 D0
1 Soft Mute On
0 1 Soft Mute with fast slope (I = I
MAX
)
1 1 Soft Mute with slow slope (I = I
MIN
)
1 Direct Mute
0 1 Zero Crossing Mute On
0 0
Zero Crossing Mute Off
(delayed until next zerocrossing)
1
Zero Crossing Mute and Pause Detector
Reset
0 0
160mV ZC Window Threshold (WIN =
00)
TDA7342 Software specification
15/20
An additional direct mute function is included in the Speaker Attenuators.
For example an attenuation of 25dB on a selected output is given by: X X X1 0 1 0 0
0 1 80mV ZC Window Threshold (WIN = 01)
1 0 40mV ZC Window Threshold (WIN = 10)
1 1 20mV ZC Window Threshold (WIN = 11)
0 Nonsymmetrical Bass Cut
(1)
1 Symmetrical Bass Cut
1. Bass cut for very low frequencies; should not be used at +16 and +18dB bass boost (DC gain)
Table 10. Speaker attenuators (LF, LR, RF, RR)
MSB LSB
Function
D7 D6
D5 D4 D3 D2 D1 D0
1.25dB step
X X X 0 0 0 0dB
X X X 0 0 1 -1.25dB
X X X 0 1 0 -2.5dB
X X X 0 1 1 -3.75dB
X X X 1 0 0 -5dB
X X X 1 0 1 -6.25dB
X X X 1 1 0 -7.5dB
X X X 1 1 1 -8.75dB
10dB step
X X X 0 0 0dB
X X X 0 1 -10dB
X X X 1 0 -20dB
X X X 1 1 -30dB
X X X 1 1 1 1 1 Speaker Mute
Table 11. Bass/Treble
MSB LSB
Function
D7 D6
D5 D4 D3 D2 D1 D0
Treble step
0 0 0 0 -14dB
0 0 0 1 -12dB
Table 9. Mute (continued)
MSB LSB
Function
D7 D6
D5 D4 D3 D2 D1 D0
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

E-TDA7342NTR

Mfr. #:
Buy E-TDA7342NTR
Manufacturer:
STMicroelectronics
Description:
IC AUDIO PROCESSOR 32-LQFP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet