DAC8571
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SLAS373A–DECEMBER 2002–REVISED JULY 2003
THEORY OF OPERATION (continued)
Data Output
by Transmitter
Not Acknowledge
Acknowledge
Data Output
by Receiver
SCL From
1
2
8
9
Master
S
Clock Pulse for
START
Acknowledgement
Condition
Figure 30. Acknowledge on the I2C Bus
Recognize START or
REPEATED START
Condition
Recognize STOP or
REPEATED START
Condition
Generate ACKNOWLEDGE
Signal
P
SDA
MSB
Acknowledgement
Signal From Slave
Sr
Address
R/W
SCL
1
2
7
8
9
1
2
3 - 8
9
S
or
Sr
Sr
or
P
ACK
ACK
Clock Line Held Low While
Interrupts are Serviced
START or
Repeated START
Condition
STOP or
Repeated START
Condition
Figure 31. Bus Protocol
13
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