TDA7404D 查看數據表（PDF） - STMicroelectronics
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TDA7404D Datasheet PDF : 26 Pages
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TDA7404D
2.3 Reset Condition
A Power-On-Reset is invoked if the Supply-Voltage is below than 3.5V. After that the following data is written
automatically into the registers of all subaddresses :
MSB
1
1
1
1
1
LSB
1
1
0
The programming after POR is marked bold-face / underlined in the programming tables.
With this programming all the outputs are muted to VREF (VOUT= VDD/2).
Note : All the blank bits in the following tables are "don't care"-bits.
2.4 SUBADDRESS (receive mode)
MSB
LSB
I3
I2
I1
I0
A3
A2
A1
A0
FUNCTION
Zero cross / Soft Mute 1
0
Zero Cross available
1
Soft Mute available
AutoZero Remain 2
0
off
1
on
Testmode 3
0
off
1
on
Auto-Increment Mode 4
0
off
1
on
0
0
0
0 Input Selector / Gain
0
0
0
1 Loudness
0
0
1
0 Volume
0
0
1
1 Treble
0
1
0
0 Bass
0
1
0
1 Speaker attenuator LF / Bass Fc select
0
1
1
0 Speaker attenuator RF
0
1
1
1 Speaker attenuator LR
1
0
0
0 Speaker attenuator RR
1
0
0
1 Subwoofer attenuator LSW
1
0
1
0 Subwoofer attenuator RSW
1
0
1
1 SoftMute / Mixing
1
1
0
0 Others selection
1
1
0
1 Testing
1 For more information see Soft Mute-section
2 For more information see AutoZero-section
3 For more information see Test Programming block
4 If this bit is set to "1", the subaddress is automatically incremented after the transmission of a data-byte.
Therefore a transmission of more than one byte without sending the new subaddress is possible.
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