Philips Semiconductors
Product specification
Remote 16-bit I/O expander for I2C-bus
PCF8575
handbook, full pagewidth
SDA
SDA
SCL
SCL
S
P
STOP condition
START condition
MBC622
Fig.4 Definition of START and STOP conditions.
SDA
SCL
MASTER
TRANSMITTER /
RECEIVER
SLAVE
TRANSMITTER /
RECEIVER
MASTER
TRANSMITTER /
RECEIVER
SLAVE
RECEIVER
MASTER
TRANSMITTER
MBA605
Fig.5 System configuration.
handbook, full pagewidth
DATA OUTPUT
BY TRANSMITTER
not acknowledge
DATA OUTPUT
BY RECEIVER
acknowledge
8
SCL FROM
MASTER
1
2
9
S
clock pulse for
acknowledgement
START
condition
MGL539
Fig.6 Acknowledgment on the I2C-bus.
1999 Apr 07
7
NXP [ NXP ]
