TDA7416_11 Datasheet, PDF (24/37 Pages) STMicroelectronics – Car radio signal processor

I2C bus interface
5
I²C bus interface
TDA7416
5.1
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)
Figure 20. Interface protocol
#()0!$$2%33
35"!$$2%33
$!4!$!4!N
-3"
,3"
-3"
,3"
-3"
3        27 !#+ 4 !: ) ! ! ! ! ! !#+
$!4!
S = Start
R/W = “0” -> Receive-Mode (Chip could be programmed by µP)
“1” -> Transmission-Mode (Data could be received by µP)
ACK = Acknowledge
P = Stop
Max clock speed 500kbits/s
,3"
!#+ 0
'!0'03
5.1.1
Auto increment
If bit I in the subaddress byte is set to “1”, the auto increment of the subaddress is enabled.
5.1.2 Transmitted data (send mode)
MSB
LSB
X
X
X
X
X
X
X
SM
SM = Soft-mute activated
X = Not Used
The transmitted data is automatically updated after each ACK.
Transmission can be repeated without new chip address.
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Doc ID 9837 Rev 2