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參數(shù)資料
| 型號： | LP55281TL |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | Quad RGB Driver |
| 中文描述： | LED DISPLAY DRIVER, PBGA36 |
| 封裝： | 3 X 3 MM, 0.60 MM HEIGHT, 0.50 MM PITCH, MICRO SMD-36 |
| 文件頁數(shù)： | 22/28頁 |
| 文件大?。?/td> | 1313K |
| 代理商： | LP55281TL |
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"negative acknowledge" still includes the acknowledge clock
pulse (generated by the master), but the SDA line is not pulled
down.
Addressing Transfer Formats
Each device on the bus has a unique slave address. The
LP55281 operates as a slave device with 7-bit address.
LP55281 I
2
C address is pin selectable from two different
choices.
The LP55281 address is 4Ch (SI/A0 = 0) or 4Dh
(SI/A0 = 1) as selected with SI/A0 pin.
If eighth bit is used
for programming, the 8
th
bit is 1 for read and 0 for write.
Before any data is transmitted, the master transmits the ad-
dress of the slave being addressed. The slave device should
send an acknowledge signal on the SDA line, once it recog-
nizes its address.
The slave address is the first seven bits after a Start Condi-
tion. The direction of the data transfer (R/W) depends on the
bit sent after the slave address (the eighth bit).
When the slave address is sent, each device in the system
compares this slave address with its own. If there is a match,
the device considers itself addressed and sends an acknowl-
edge signal. Depending upon the state of the R/W bit (1 for
read, 0 for write), the device acts as a transmitter or a receiver.
20201151
I
2
C Device Address
Control Register Write Cycle
Master device generates start condition
Master device sends slave address (7 bits) and the data
direction bit (r/w=0).
Slave device sends acknowledge signal if the slave
address is correct.
Master sends control register address (8 bits).
Slave sends acknowledge signal.
Master sends data byte to be written to the addressed
register.
Slave sends acknowledge signal.
If master will send further data bytes, the control register
address will be incremented by one after acknowledge
signal
Write cycle ends when the master creates stop condition.
Control Register Read Cycle
Master device generates a start condition.
Master device sends slave address (7 bits) and the data
direction bit (r/w=0).
Slave device sends acknowledge signal if the slave
address is correct.
Master sends control register address (8 bits).
Slave sends acknowledge signal.
Master device generates repeated start condition.
Master sends the slave address (7 bits) and the data
direction bit (r/w=1).
Slave sends acknowledge signal if the slave address is
correct.
Slave sends data byte from addressed register.
If the master device sends acknowledge signal, the control
register address will be incremented by one. Slave device
sends data byte from addressed register.
Read cycle ends when the master does not generate
acknowledge signal after data byte and generates stop
condition.
Address Mode
Data Read
<Start Condition>
<Slave Address><r/w = 0>[Ack]
<Register Address>[Ack]
<Repeated Start Condition>
<Slave Address><r/w = 1>[Ack]
[Register Data]<Ack or NAck>
...additional reads from subsequent
register address possible
<Stop Condition>
Data Write
<Start Condition>
<Slave Address><r/w = 0>[Ack]
<Register Address>[Ack]
<Register Data>[Ack]
...additional writes to subsequent
register address possible
<Stop Condition>
< > Data from master, [ ] data from slave
20201194
Register Read Format
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22
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PDF描述 |
|---|---|
| LP55281TLX | Quad RGB Driver |
| LP5551 | PowerWise⑩ Technology Compliant Energy Management Unit |
| LP5551SQ | PowerWise⑩ Technology Compliant Energy Management Unit |
| LP5551SQX | PowerWise⑩ Technology Compliant Energy Management Unit |
| LPBC4-3 | POWR-BLOKS Distribution/Splicer Blocks and Covers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP55281TL/NOPB | 功能描述:LED照明驅(qū)動器 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP55281TLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad RGB Driver |
| LP55281TLX/NOPB | 功能描述:LED照明驅(qū)動器 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: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP-554770-2S-4M | 制造商:Alpha 3 Manufacturing 功能描述: |
| LP5550 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PowerWise Technology Compliant Energy Management Unit |
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