TDA7411 Datasheet, PDF (30/43 Pages) STMicroelectronics – ADVANCED CAR SIGNAL PROCESSOR

TDA7411
I²C BUS INTERFACE DESCRIPTION
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 1 0 R/W ACK A4 AZ T I A3 A2 A1 A0 ACK
D03AU1526
S = Start
ACK = Acknowledge
AZ = AutoZero-Remain
T = Testing
I = Autoincrement
P = Stop
MAX CLOCK SPEED 500kbits/s
DATA
LSB
ACK P
Auto increment
If bit I in the subaddress byte is set to "1", the autoincrement of the subaddress is enabled.
TRANSMITTED DATA (send mode)
MSB
X
X
X
X
SM = Soft mute activated
ST = Stereo
X = Not Used
ST
SM
LSB
X
X
The transmitted data is automatically updated after each ACK.
Transmission can be repeated without new chip address.
Reset Condition
A power on reset is invoked if the supply voltage is below than 3.5V. After that the following data are written
automatically into the registers of all sub addresses:
MSB
LSB
1
1
1
1
1
1
1
0
The programming after POR is marked bold face / underlined in the programming tables. With that pro-
gramming all the outputs are muted to Vr^ef.
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