PCA9554BS-T NXP Semiconductors, PCA9554BS-T Datasheet - Page 10

• Manufacturer Part Number: PCA9554BS-T
• Description: I2C Interface IC 8-BIT I2C FM TP GPIO INT PU
• Manufacturer: NXP Semiconductors

Specifications of PCA9554BS-T

• Product Category: I2C Interface IC
• Rohs: yes
• Package / Case: SOT-629
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 6000
• Part # Aliases: PCA9554BS,118

NXP Semiconductors
PCA9554_9554A
Product data sheet
Fig 11. Write to Output Port register
Fig 12. Write to Configuration register or Polarity Inversion register
write to port
from port
register
data out
data to
SDA
SCL
SDA
SCL
S
START condition
S
START condition
6.5 Device address
6.6 Bus transactions
1
0
1
0
2
2
1
1
Data is transmitted to the PCA9554/PCA9554A registers using the Write mode as shown
in
Read mode as shown in
auto-increment function, so once a command byte has been sent, the register which was
addressed will continue to be accessed by reads until a new command byte has been
sent.
slave address
slave address
Fig 9.
3
3
0
Figure 11
0
4
0 A2 A1 A0 0
4
0 A2 A1 A0 0
5
5
0
PCA9554 device address
6
acknowledge
6
acknowledge
from slave
1
and
from slave
7
fixed
7
R/W
R/W
slave address
All information provided in this document is subject to legal disclaimers.
8
0
8
Figure
9
A
9
A
0
0
0
Rev. 9 — 19 March 2013
A2
12. Data is read from the PCA9554/PCA9554A registers using the
selectable
hardware
Figure 13
0
0
A1
command byte
0
command byte
0
002aac494
0
A0 R/W
0
0
0
and
acknowledge
acknowledge
0
0
from slave
from slave
8-bit I
1 1/0
Figure
0
1
PCA9554; PCA9554A
A
2
A
Fig 10. PCA9554A device address
C-bus and SMBus I/O port with interrupt
14. These devices do not implement an
0
data to register
data to port
DATA 1
DATA
1
fixed
slave address
1
acknowledge
acknowledge
from slave
from slave
1
t
v(Q)
A2
selectable
hardware
© NXP B.V. 2013. All rights reserved.
A
A
A1
002aac473
P
STOP
condition
P
STOP
condition
data 1 valid
002aac495
A0 R/W
002aac472
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