TDA7563A Datasheet, PDF (23/35 Pages) STMicroelectronics – 4 x 50W multifunction quad power amplifier with built-in diagnostics feature

TDA7563A
I2C bus
7.6
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 SDA line is stable LOW during this clock
pulse.
(*) Transmitter
– master (µP) when it writes an address to the TDA7563A
– slave (TDA7563A) when the µP reads a data byte from TDA7563A
(**) Receiver
– slave (TDA7563A) when the µP writes an address to the TDA7563A
– master (µP) when it reads a data byte from TDA7563A
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
I²CBUS
STOP
Figure 31. Timing acknowledge clock pulse
SCL
1
2
3
7
SDA
START
MSB
D99AU1033
8
9
ACKNOWLEDGMENT
FROM RECEIVER
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