參數(shù)資料
型號(hào)： LM1262
廠商： National Semiconductor Corporation
元件分類： 視頻放大器
英文描述： 200 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
中文描述： 200 MHz的I2C兼容的RGB視頻放大器系統(tǒng)的OSD和DAC的
文件頁(yè)數(shù)： 16/20頁(yè)
文件大小： 1122K
代理商： LM1262
PCB Layout
Micro-Controller Interface
The micro-controller interfaces to the LM1262 pre-amp via
an I
2
C interface. The protocol of the interface begins with the
Start Pulse followed by a byte comprised of a seven-bit
Slave Device Address and a Read/Write bit as the LSB.
Therefore the address of the LM1262 for writing is DCh
(1101 1100) and the address for reading is DDh (1101 1101).
Figures 11, 12 show a write and read sequence across the
I
2
C interface.
Write Sequence
The write sequence begins with a start condition which
consists of the master pulling SDA low while SCL is held
high. The slave device address is next sent. The address
byte is made up of an address of seven bits (7–1) and the
read/write bit (0). Bit 0 is low to indicate a write operation.
Each byte that is sent is followed by an acknowledge. When
SCL is high the master will release the SDA line. The slave
must pull SDA low to acknowledge. The address of the
register to be written to is sent next. Following the register
address and the acknowledge bit the data for the register is
sent. If bit 0 of register 0Ah is set low (default value) then the
LM1262 is set for the increment mode. In this mode when
more than one data byte is sent it is automatically incre-
mented into the next address location. See Figure 11 Note
that each data byte is followed by an acknowledge bit.
Read Sequence
Read sequences are comprised of two I
2
C transfer se-
quences. The first is a write sequence that only transfers the
address to be accessed. The second is a read sequence that
starts at the address transferred in the previous address
write access and incrementing to the next address upon
every data byte read. This is shown in Figure 12
The write sequence consists of the Start Pulse, the Slave
Device Address including the Read/Write bit (a zero, indicat-
ing a write), then its Acknowledge bit. The next byte is the
address to be accessed, followed by itsAcknowledge bit and
the stop bit indicating the end of the address only write
access.
Next the read data access is performed beginning with the
Start Pulse, the Slave Device Address including the Read/
Write bit (a one, indicating a read) and the Acknowledge bit.
The next 8 bits will be the data read from the address
indicated by the write sequence. Subsequent read data
bytes will correspond to the next increment address loca-
tions. Each data byte is separated from the other data bytes
by an Acknowledge bit.
DS200404-37
FIGURE 10. High Speed Low Cost System Neck Board
L
www.national.com
16
相關(guān)PDF資料
PDF描述
LM1262NA 200 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
LM1267NA 150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
LM1267 150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
LM1269NA 110 MHz I2C Compatible RGB Video Amplifier System with OSD & DACs
LM1269 110 MHz I2C Compatible RGB Video Amplifier System with OSD & DACs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM1262NA 制造商:NSC 制造商全稱:National Semiconductor 功能描述:200 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
LM1262NA/NOPB 功能描述:IC PREAMP RGB 200MHZ 24-DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064
LM1267 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
LM1267NA 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Video Amplifier System with OSD and DACs
LM1267NA/NOPB 功能描述:IC PREAMP RGB 150MHZ 24-DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064
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