TDA7437 Datasheet, PDF (8/23 Pages) STMicroelectronics – DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7437
SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (s)
A chip address byte,(the LSB bit determines
read (=1)/write (=0) 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 A R/W ACK X X X I A3 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
ADDRpin open
A= 0
ADDRpin close to Vs A = 1
AUTO INCREMENT
If bit I in the subaddress byte is set to ”1”, the autoincrement of the subaddress is enabled
SUBADDRESS (receive mode)
MSB
X
X
X
LSB
FUNCTION
I
A3
A2
A1
A0
0
0
0
0 Input Selector
0
0
0
1 Loudness
0
0
1
0 Volume
0
0
1
1 Bass, Treble
0
1
0
0 Speaker Attenuator LF
0
1
0
1 Speaker Attenuator LR
0
1
1
0 Speaker Attenuator RF
0
1
1
1 Speaker Attenuator RR
1
0
0
0 Input Gain Middle
1
0
0
1 Mute
TRANSMITTED DATA
Send Mode
MSB
LSB
X X X X X SM ZM P
P = Pause (Active low)
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 chipaddress.
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