PCA9671D,118 NXP Semiconductors, PCA9671D,118 Datasheet - Page 18

• Manufacturer Part Number: PCA9671D,118
• Description: IC I/O EXPANDER I2C 16B 24SOIC
• Manufacturer: NXP Semiconductors

Specifications of PCA9671D,118

• Interface: I²C
• Number Of I /o: 16
• Interrupt Output: No
• Frequency - Clock: 1MHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Includes: POR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4192-2; 935283551118; PCA9671D-T

NXP Semiconductors
10. Application design-in information
PCA9671
Product data sheet
10.1 Bidirectional I/O expander applications
In the 8-bit I/O expander application shown in
to P07 are outputs. When used in this configuration, during a write, the input (P00 and
P01) must be written as HIGH so the external devices fully control the input ports. The
desired HIGH or LOW logic levels may be written to the I/Os used as outputs (P02 to
P07). During a read, the logic levels of the external devices driving the input ports (P00
and P01) and the previous written logic level to the output ports (P02 to P07) will be read.
The GPIO also has a reset line (RESET) that can be connected to an output pin of the
microprocessor. Since the device does not have an interrupt output, changes of the I/Os
can be monitored by reading the input registers. If both a RESET and INT are needed,
use the PCA9673.
Fig 22. Acknowledgement on the I
Fig 23. Bidirectional I/O expander application
SCL from master
by transmitter
data output
data output
by receiver
PROCESSOR
All information provided in this document is subject to legal disclaimers.
CORE
Rev. 2 — 29 July 2010
condition
START
V
DD
S
Remote 16-bit I/O expander for Fm+ I
2
C-bus
1
SDA
SCL
RESET
A0
A1
A2
V
DD
Figure
2
P00
P01
P02
P03
P04
P05
P06
P07
23, P00 and P01 are inputs, and P02
temperature sensor
battery status
control for latch
control for switch
control for audio
control for camera
control for MP3
acknowledgement
not acknowledge
clock pulse for
acknowledge
8
002aac253
PCA9671
© NXP B.V. 2010. All rights reserved.
2
V
002aaa987
9
C-bus with reset
DD
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