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參數(shù)資料
| 型號(hào)： | LP3944 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | RGB/White/Blue 8-LED Fun Light Driver |
| 中文描述： | 的RGB /白/藍(lán)8的LED燈驅(qū)動(dòng)器樂(lè) |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 249K |
| 代理商： | LP3944 |
Application Notes
(Continued)
AUTO INCREMENT
Auto increment is a special feature supported by the LP3944
to eliminate repeated chip and register addressing when
data are to be written to or read from registers in sequential
order. The auto increment bit is inside the register address
byte, as shown in
Figure 6
. Auto increment is enabled when
this bit is programmed to “1” and disabled when it is pro-
grammed to “0”.
In the READ mode, when auto increment is enabled, I
2
C
master could receive any number of bytes from LP3944
without selecting chip address and register address again.
Every time the I
2
C master reads a register, the LP3944 will
increment the register address and the next data register will
be read. When I
2
C master reaches the last register (09H
register), the register address will roll over to 00H.
In the WRITE mode, when auto increment is enabled, the
LP3944 will increment the register address every time I
2
C
master writes to register. When the last register (09H regis-
ter) is reached, the register address will roll over to 02H,
because the first two registers in LP3944 are read-only
registers. It is possible to write to these two registers, and the
LP3944 will acknowledge, but the data will be ignored.
In the LP3944, registers 0x01, 0x08 and 0x09 are not func-
tional. However, it is still necessary to read from 0x01 and to
write to 0x08 and 0x09 inAuto Increment mode. They cannot
be skipped.
If auto increment is disabled, and the I
2
C master does not
change register address, it will continue to write data into the
same register.
20085311
FIGURE 6. Register Address Byte
20085312
FIGURE 7. Programming with Auto Increment Disabled (in WRITE Mode)
20085313
FIGURE 8. Programming with Auto Increment Enabled (in WRITE Mode)
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3944ISQ | 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3944ISQ/NOPB | 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3944ISQEV | 功能描述:電源管理IC開(kāi)發(fā)工具 LP3944 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP3944ISQEV/NOPB | 制造商:Texas Instruments 功能描述:Evaluation Board For LED Driver 8Segment 2.5V/3.3V/5V T/R |
| LP3944ISQX | 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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