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參數(shù)資料
| 型號： | PCA9534APWR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8 I/O, PIA-GENERAL PURPOSE, PDSO16 |
| 封裝： | GREEN, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 38/41頁 |
| 文件大?。?/td> | 985K |
| 代理商： | PCA9534APWR |
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SDA
SCL
Start Condition
S
Stop Condition
P
SDA
SCL
Data Line
Stable;
Data Valid
Change
of Data
Allowed
Data Output
by Transmitter
SCL From
Master
Start
Condition
S
1
2
8
9
Data Output
by Receiver
Clock Pulse for
Acknowledgment
NACK
ACK
SCPS141F – SEPTEMBER 2006 – REVISED JUNE 2010
www.ti.com
A stop condition, a low-to-high transition on the SDA input/output while the SCL input is high, is sent by the
master (see Figure 1).
Any number of data bytes can be transferred from the transmitter to receiver between the start and the stop
conditions. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before
the receiver can send an ACK bit. The device that acknowledges must pull down the SDA line during the ACK
clock pulse so that the SDA line is stable low during the high pulse of the ACK-related clock period (see
Figure 3). When a slave receiver is addressed, it must generate an ACK after each byte is received. Similarly,
the master must generate an ACK after each byte that it receives from the slave transmitter. Setup and hold
times must be met to ensure proper operation.
A master receiver will signal an end of data to the slave transmitter by not generating an acknowledge (NACK)
after the last byte has been clocked out of the slave. This is done by the master receiver by holding the SDA line
high. In this event, the transmitter must release the data line to enable the master to generate a stop condition.
Figure 1. Definition of Start and Stop Conditions
Figure 2. Bit Transfer
Figure 3. Acknowledgment on I2C Bus
6
Copyright 2006–2010, Texas Instruments Incorporated
Product Folder Link(s): PCA9534A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9534APWR | 制造商:Texas Instruments 功能描述:I2CLogicInterfaceDeviceICs |
| PCA9534APWRG4 | 功能描述:接口-I/O擴展器 Remote 8B I2C & Lo- Pwr I/O Expander 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 |
| PCA9534ARGTR | 功能描述:接口-I/O擴展器 Remote 8B I2C and Lo-Pwr I/O Expander 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 |
| PCA9534ARGTRG4 | 功能描述:接口-I/O擴展器 Remote 8B I2C and Lo-Pwr I/O Expander 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 |
| PCA9534ARGVR | 功能描述:接口-I/O擴展器 Remote 8B I2C & Lo- Pwr I/O Expander 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 |
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