參數(shù)資料
型號： PCA9670D,518
廠商： NXP Semiconductors
文件頁數(shù)： 4/35頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER I2C 8B 16SOIC
產(chǎn)品培訓(xùn)模塊： LED Controllers
I²C Bus Fundamentals
特色產(chǎn)品： NXP - I2C Interface
標準包裝： 1
接口： I²C
輸入/輸出數(shù)： 8
中斷輸出： 無
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(yīng)商設(shè)備封裝： 16-SO
包裝： 標準包裝
包括： POR
產(chǎn)品目錄頁面： 826 (CN2011-ZH PDF)
其它名稱： 568-4188-6
PCA9670
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 3 — 30 May 2013
12 of 35
NXP Semiconductors
PCA9670
Remote 8-bit I/O expander for Fm+ I2C-bus with reset
8.2 Writing to the port (Output mode)
The master (microcontroller) sends the START condition and slave address, setting the
last bit of the address byte to logic 0 for the write mode. The PCA9670 acknowledges and
the master then sends the data byte for P7 to P0 to the port register. As the clock line
goes HIGH, the 8-bit data is presented on the port lines after it has been acknowledged by
the PCA9670. If a LOW is written, the strong pull-down turns on and stays on. If a HIGH is
written, the strong pull-up turns on for 12 of the clock cycle, then the line is held HIGH by
the weak current source. The master can then send a STOP condition or continuing
sending data. The number of data bytes that can be sent successively is not limited and
the previous data is overwritten every time a data byte has been sent and acknowledged.
Ensure a logic 1 is written for any port that is being used as an input to ensure the strong
external pull-down is turned off.
Fig 12. Simple quasi-bidirectional I/O
002aah683
VDD
weak 100 A
current source
(inactive when
output LOW)
output HIGH
VSS
output LOW
accelerator
pull-up
P port
P7 - P0
pull-down with
resistor to VSS or
external drive LOW
input LOW
pull-up with
resistor to VDD or
external drive HIGH
input HIGH
Fig 13. Write mode (output)
A5 A4 A3 A2 A1 A0
0
A
SA6
slave address
START condition
R/W
acknowledge
from slave
002aac265
P6
1
P7
data 1
A
acknowledge
from slave
12345678
SCL
9
SDA
A
acknowledge
from slave
write to port
data output from port
tv(Q)
P5
data 2
DATA 2 VALID
P4 P3 P2 P1 P0
P7
P4 P3 P2 P1 P0
0
P5
tv(Q)
DATA 1 VALID
P5 output voltage
Itrt(pu)
IOH
P5 pull-up output current
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9670D-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
PCA9670PW 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
PCA9670PW,112 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
PCA9670PW,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
PCA9670PW-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
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