參數(shù)資料
型號： PCA9674ATS,118
廠商： NXP Semiconductors
文件頁數(shù)： 8/40頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER I2C 8B 20SSOP
產(chǎn)品培訓(xùn)模塊： LED Controllers
標(biāo)準(zhǔn)包裝： 1
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： 20-LSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 20-SSOP
包裝： 標(biāo)準(zhǔn)包裝
包括： POR
其它名稱： 568-4074-6
PCA9674_PCA9674A
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 7 — 30 May 2013
16 of 40
NXP Semiconductors
PCA9674; PCA9674A
Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
Simple code for Write cycle:
<S> <slave address + W> <ACK> <DATA1> <ACK> <DATA2> <ACK> <DATA1> ...
<DATA2> <ACK> <P>
8.3 Reading from a port (Input mode)
The port must have been previously written to logic 1, which is the condition after
power-on reset or software reset. To enter the Read mode the master (microcontroller)
addresses the slave device and sets the last bit of the address byte to logic 1 (address
byte read). The slave will acknowledge and then send the data byte to the master. The
master will NACK and then send the STOP condition or ACK and read the input register
again.
The read of any pin being used as an output will indicate HIGH or LOW depending on the
actual state of the pin.
If the data on the input port changes faster than the master can read, this data may be
lost. The DATA 2 and DATA 3 are lost because these data did not meet the set-up time
and hold time (see Figure 14).
Simple code for Read cycle:
<S> <slave address + R> <ACK> <DATA in> <ACK> <DATA in> ... <NACK> <P>
A LOW-to-HIGH transition of SDA while SCL is HIGH is defined as the STOP condition (P). Transfer of data can be stopped at
any moment by a STOP condition. When this occurs, data present at the last acknowledge phase is valid (Output mode). Input
data is lost.
Fig 14. Read input port register
A5 A4 A3 A2 A1 A0
1
A
SA6
slave address
START condition
R/W
acknowledge
from slave
002aah383
data from port
A
acknowledge
from master
SDA
1
no acknowledge
from master
read from
port
data at
port
data from port
DATA 1
DATA 4
INT
DATA 4
DATA 2
DATA 3
P
STOP
condition
tv(INT)
trst(INT)
th(D)
tsu(D)
trst(INT)
DATA 1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9674ATS-T 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB GPIO INT 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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9674BS,118 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB 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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9674BS-T 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB GPIO RST 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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9674D 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB GPIO INT 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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9674D,512 功能描述:接口-I/O擴展器 8-BIT I2C FM+ QB 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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
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