參數(shù)資料
型號： PCA9672D,512
廠商： NXP Semiconductors
文件頁數(shù)： 8/36頁
文件大小： 0K
描述： IC I/O EXPANDER I2C 8B 16SOIC
標準包裝： 48
接口： I²C
輸入/輸出數(shù)： 8
中斷輸出： 是
頻率 - 時鐘： 1MHz
電源電壓： 2.3 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.295"，7.50mm 寬）
供應商設備封裝： 16-SO
包裝： 管件
包括： POR
其它名稱： 935282746512
PCA9672D
PCA9672D-ND
PCA9672
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 3 — 27 May 2013
16 of 36
NXP Semiconductors
PCA9672
Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt and reset
10. Application design-in information
10.1 Bidirectional I/O expander applications
In the 8-bit I/O expander application shown in Figure 20, P0 and P1 are inputs, and P2 to
P7 are outputs. When used in this configuration, during a write, the input (P0 and P1)
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 (P2 to P7).
If 10
A internal output HIGH is not enough current source, the port needs external pull-up
resistor. During a read, the logic levels of the external devices driving the input ports (P0
and P1) and the previous written logic level to the output ports (P2 to P7) will be read.
The GPIO also has an interrupt line (INT) that can be connected to the interrupt logic of
the microprocessor. By sending an interrupt signal on this line, the remote I/O informs the
microprocessor that there has been a change of data on its ports without having to
communicate via the I2C-bus.
The GPIO also has a reset line (RESET) that can be connected to an output pin of the
microcontroller.
10.2 How to read and write to I/O expander (example)
In the application example of PCA9672 shown in Figure 20, the microcontroller wants to
control the P3 switch ON and the P7 LED ON when the temperature sensor P0 changes.
1. When the system power on:
Core Processor needs to issue an initial command to set P0 and P1 as inputs and
P[7:2] as outputs with value 1010 00 (LED off, MP3 off, camera on, audio off,
switch off and latch off).
2. Operation:
When the temperature changes above the threshold, the temperature sensor signal
will toggle from HIGH to LOW. The INT will be activated and notifies the ‘core
processor’, that there have been changes on the input pins. Read the input register.
If P0 = 0 (temperature sensor has changed), then turn on LED and turn on switch.
Fig 20. Bidirectional I/O expander application
002aac330
VDD
temperature sensor
battery status
control for latch
control for switch
control for audio
control for camera
control for MP3
P0
P1
P2
P3
P4
P5
P6
P7
VDD
SDA
SCL
INT
AD0
AD1
CORE
PROCESSOR
VDD
RESET
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參數(shù)描述
PCA9672D-T 功能描述:接口-I/O擴展器 8BIT I2C FM+ QB GPIO INT-RS PU RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9672PW 功能描述:接口-I/O擴展器 8BIT I2C FM+ QB GPIO INT-RS PU RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9672PW,112 功能描述:接口-I/O擴展器 8BIT I2C FM+ QB GPIO RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9672PW,118 功能描述:接口-I/O擴展器 8BIT I2C FM+ QB GPIO INT-RS PU RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9672PW112 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述:
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