TDA7435 Datasheet, PDF (6/10 Pages) STMicroelectronics – DIGITALLY CONTROLLED AUDIO PROCESSOR WITH LOUDSPEAKERS EQUALIZER

TDA7435
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (s)
A chip address byte,(the LSB bit determines
read/write transmission)
A subaddress byte.
A sequence of data (N-bytes + acknowledge)
A stop condition (P)
CHIP ADDRESS
SUBADDRESS
DATA 1 to DATA n
MSB
LSB MSB
LSB MSB
S 1 0 0 0 1 0 1 R/W ACK X X X I X A2 A1 A0 ACK
DATA
LSB
ACK P
ACK = Acknowledge
S = Start
P = Stop
I = Auto Increment
X = Not used
MAX CLOCK SPEED 500kbits/s
AUTO INCREMENT
If bit I in the subaddress byte is set to ”1”, the autoincrement of the subaddress is enabled
SUBADDRESS (receive mode)
MSB
LSB
X
X
X
I
X
D2
D1
D0
FUNCTION
0
0
0 Mux & Gain
0
0
1 Mute
0
1
0 Speaker Attenuator AUX 1 L
0
1
1 Speaker Attenuator AUX 1 R
1
0
0 High Pass Filter FL
1
0
1 High Pass Filter FR
1
1
0 High Pass Filter RL
1
1
1 High Pass Filter RR
TRANSMITTED DATA
Send Mode
MSB
LSB
X X X X X SM X X
SM = Soft mute activated (HIGH active)
X = Not used
The transmitted data is automatically updated after each ACK.
Transmission can be repeated without new chipaddress.
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