參數(shù)資料
型號(hào)： PCA9551D
廠商： NXP Semiconductors N.V.
元件分類： LED驅(qū)動(dòng)器
英文描述： 8-bit I2C-bus LED driver with programmable blink rates
封裝： PCA9551BS<SOT629-1 (HVQFN16)|<<http://www.nxp.com/packages/SOT629-1.html<1<Always Pb-free,;PCA9551D<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<we
文件頁(yè)數(shù)： 26/26頁(yè)
文件大小： 155K
代理商： PCA9551D
PCA9551_8
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 08 — 31 July 2008
9 of 26
NXP Semiconductors
PCA9551
8-bit I2C-bus LED driver with programmable blink rates
7.3 Acknowledge
The number of data bytes transferred between the START and the STOP conditions from
transmitter to receiver is not limited. Each byte of eight bits is followed by one
acknowledge bit. The acknowledge bit is a HIGH level put on the bus by the transmitter,
whereas the master generates an extra acknowledge related clock pulse.
A slave receiver which is addressed must generate an acknowledge after the reception of
each byte. Also a master must generate an acknowledge after the reception of each byte
that has been clocked out of the slave transmitter. The device that acknowledges has to
pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable
LOW during the HIGH period of the acknowledge related clock pulse; set-up and hold
times must be taken into account.
A master receiver must signal an end of data to the transmitter by not generating an
acknowledge on the last byte that has been clocked out of the slave. In this event, the
transmitter must leave the data line HIGH to enable the master to generate a STOP
condition.
Fig 9.
System conguration
002aaa966
MASTER
TRANSMITTER/
RECEIVER
SLAVE
RECEIVER
SLAVE
TRANSMITTER/
RECEIVER
MASTER
TRANSMITTER
MASTER
TRANSMITTER/
RECEIVER
SDA
SCL
I2C-BUS
MULTIPLEXER
SLAVE
Fig 10. Acknowledgement on the I2C-bus
002aaa987
S
START
condition
9
8
2
1
clock pulse for
acknowledgement
not acknowledge
acknowledge
data output
by transmitter
data output
by receiver
SCL from master
相關(guān)PDF資料
PDF描述
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PCA9552D 16-bit I2C-bus LED driver with programmable blink rates
PCA9552PW 16-bit I2C-bus LED driver with programmable blink rates
PCA9553D 4-bit I2C-bus LED driver with programmable blink rates
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9551D,112 功能描述:LED照明驅(qū)動(dòng)器 I2C LED BLINKER 8BIT RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
PCA9551D,118 功能描述:LED照明驅(qū)動(dòng)器 8-BIT I2C FM OD LED BLK RST RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
PCA9551D-T 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I2C-bus LED driver with programmable blink rates
PCA9551PW 功能描述:LED照明驅(qū)動(dòng)器 I2C LED BLINKER 8BIT RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
PCA9551PW,112 功能描述:LED照明驅(qū)動(dòng)器 I2C LED BLINKER 8BIT RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N
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