參數(shù)資料
型號(hào)： LNBEH21PD
廠商： 意法半導(dǎo)體
英文描述： LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND IC INTERFACE
中文描述： LNB電源與控制集成電路升壓轉(zhuǎn)換器及IC的接口
文件頁(yè)數(shù)： 6/22頁(yè)
文件大?。?/td> 588K
代理商： LNBEH21PD
LNBEH21
6/22
DATA VALIDITY
As shown in fig. 4, the data on the SDA line must be stable during the high period of the clock. The HIGH
and LOW state of the data line can only change when the clock signal on the SCL line is LOW.
START AND STOP CONDITIONS
As shown in fig. 5 a start condition is a HIGH to LOW transition of the SDA line while SCL is HIGH. The
stop condition is a LOW to HIGH transition of the SDA line while SCL is HIGH. A STOP conditions must
be sent before each START condition.
BYTE FORMAT
Every byte transferred to the SDA line must contain 8 bits. Each byte must be followed by an acknowledge
bit. The MSB is transferred first.
ACKNOWLEDGE
The master (μP) puts a resistive HIGH level on the SDA line during the acknowledge clock pulse (see fig.
6). The peripheral (LNBEH21) that acknowledges has to pull-down (LOW) the SDA line during the
acknowledge clock pulse, so that the SDA line is stable LOW during this clock pulse. The peripheral which
has been addressed has to generate an acknowledge after the reception of each byte, otherwise the SDA
line remains at the HIGH level during the ninth clock pulse time. In this case the master transmitter can
generate the STOP information in order to abort the transfer. The LNBEH21 won't generate the
acknowledge if the V
CC
supply is below the Undervoltage Lockout threshold (6.7V typ.)
TRANSMISSION WITHOUT ACKNOWLEDGE
Avoiding to detect the acknowledge of the LNBEH21, the μP can use a simpler transmission: simply it
waits one clock without checking the slave acknowledging, and sends the new data.
This approach of course is less protected from misworking and decreases the noise immunity.
Figure 4: Data Validity On The I
2
C Bus
Figure 5: Timing Diagram On I
2
C Bus
相關(guān)PDF資料
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LNBEH21PD-TR LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND IC INTERFACE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LNBEH21PD-TR 功能描述:其他電源管理 LNB Supply/Control RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
LNBEH221PD-R 制造商:STMicroelectronics 功能描述:LNBEH221PD-R - Tape and Reel
LNBH2 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
LNBH21 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
LNBH21PD 功能描述:其他電源管理 LNB Supply/Cont IC RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
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