PCA9558PW,112 NXP Semiconductors, PCA9558PW,112 Datasheet - Page 8

• Manufacturer Part Number: PCA9558PW,112
• Description: IC I2C/SMBUS 8BIT 28-TSSOP
• Manufacturer: NXP Semiconductors

Specifications of PCA9558PW,112

• Applications: PC's, PDA's
• Interface: I²C
• Voltage - Supply: 3 V ~ 3.6 V
• Package / Case: 28-TSSOP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-3399-5; 935269433112; PCA9558PW

NXP Semiconductors
PCA9558_4
Product data sheet
Fig 7.
Fig 8.
I
I
2
2
C-bus write for MUXCNTRL register
C-bus read for MUXCNTRL register
S
START condition
S
START condition
7.1.2.1 IP - Input Port register
1
7.1.2 Registers
1
0
0
slave address
slave address
0
0
The GPIOs are controlled by a set of 4 internal registers: Input Port (IP) register; Output
Port (OP) register; Polarity Inversion (PI) register; and the Input/Output Configuration
(IOC) register. Each register is read/write via the I
exception of the Input Port register, which is read only, one at a time. The read/write takes
place on the slave Acknowledge. The control of which register is currently available to the
I
for details.
This register is an input-only port. It reflects the logic value present on the GPIO pins
regardless of whether they are configured as inputs or outputs (IOC register). Writes to
this register have no effect.
Table 5.
1
Bit
Symbol
Default
2
C-bus is set by bits in the control register. See
1
1
1
1 A0 0
1 A0 0
R/W
IP - Input Port register description
R/W
I7
7
0
A
acknowledge
from slave
A
acknowledge
from slave
0
0
0
0
command byte
Rev. 04 — 14 April 2009
0
I6
6
0
command byte
0
0
0
1
1
0
acknowledge
0
acknowledge
I5
5
0
from slave
1
from slave
1
1
1
(cont.)
A
A
S
I4
(re)START
condition
4
0
0
1
0
0
Section 7.1.2.1
0
0
2
C-bus or 256-byte EEPROM, with the
0
slave address
data from slave
0
0
data byte
I3
0
3
0
1
0
0
1
0
8-bit I
no acknowledge
0 B1
acknowledge
1 A0 1
0 B1 B0
from slave
from master
I2
2
0
through
B0
R/W
2
C-bus/SMBus I/O port
A
NA
A
PCA9558
acknowledge
from slave
002aad371
© NXP B.V. 2009. All rights reserved.
P
STOP
condition
002aad372
(cont.)
Section 7.1.2.4
P
STOP
condition
I1
1
0
I0
0
0
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