TDA7407_07 Datasheet, PDF (34/46 Pages) STMicroelectronics – Advanced car signal processor

I2C Bus interface description
6
I²C Bus interface description
TDA7407
6.1
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
Table 10. Addresses
Chip address
Subaddress
Data 1 to data n
MSB
LSB
MSB
LSB
MSB
S 1 0 0 0 1 1 0 R/W ACK X AZ T I A3 A2 A1 A0 ACK
DATA
LSB
ACK P
D97AU627
S = Start
ACK = Acknowledge
AZ = AutoZero Remain
T = Testing
I = Auto increment
P = Stop
Max clock speed 500kbits/s
The transmitted data is automatically updated after each ACK. Transmission can be
repeated without new chip address.
6.2
Auto increment
If bit I in the subaddress byte is set to "1", the autoincrement of the subaddress is enabled.
Table 11. Transmitted data (send mode)
MSB
X
X
X
SM = Soft mute activated
ST = Stereo
X = Not Used
LSB
X
ST
SM
X
X
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