TDA7563B Datasheet, PDF (22/33 Pages) STMicroelectronics – 4 x 50W multifunction quad power amplifier with built-in diagnostics feature

I²C Bus
TDA7563B
7.2.4
Acknowledge
The transmitter* puts a resistive HIGH level on the SDA line during the acknowledge clock
pulse (see Figure 31). The receiver** the acknowledges has to pull-down (LOW) the SDA
line during the acknowledge clock pulse, so that the SDAline is stable LOW during this clock
pulse.
* Transmitter
– master (μP) when it writes an address to the TDA7563B
– slave (TDA7563B) when the μP reads a data byte from TDA7563B
** Receiver
– slave (TDA7563B) when the μP writes an address to the TDA7563B
– master (µP) when it reads a data byte from TDA7563B
Figure 29. Data validity on the I²C Bus
SDA
SCL
DATA LINE
STABLE, DATA
VALID
CHANGE
DATA
ALLOWED
D99AU1031
Figure 30. Timing diagram on the I²C Bus
SCL
SDA
START
D99AU1032
Figure 31. Acknowledge on the I²C Bus
SCL
1
2
3
7
I²CBUS
STOP
8
9
SDA
START
MSB
D99AU1033
ACKNOWLEDGMENT
FROM RECEIVER
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