PCA9544 Philips Semiconductors, PCA9544 Datasheet - Page 7

• Manufacturer Part Number: PCA9544
• Description: 4-channel I2C multiplexer and interrupt controller
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1999 Oct 07
4-channel I
SDA
SDA
2
SCL
C multiplexer and interrupt controller
SDA
start condition
S
start condition
S
1
1
1
X
1
2
SLAVE ADDRESS
1
X
1
3
SLAVE ADDRESS
1
X
0
4
0
A2
X
5
A2
A1
X
Figure 6. WRITE control register
Figure 7. READ control register
6
A1
A0
X
7
A0
R/W
X
0
8
R/W
1
A
X
acknowledge
from slave
9
INT3
A
acknowledge
from slave
X
7
INT3
1
INT2
CONTROL REGISTER
X
PREVIOUS CHANNEL
INT2
2
INT1
CONTROL REGISTER
X
INT1
3
INT0
X
4
INT0
X
X
5
X
B2
X
6
B2
acknowledge
from slave
B1
no acknowledge
from master
X
7
B1
B0
X
8
B0
A
last byte
t
pv
9
NA
P
P
stop condition
NEW CHANNEL
SW00378
SW00377
Product specification
PCA9544