- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384594 > LM1246 (National Semiconductor Corporation) 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs PDF資料下載
參數(shù)資料
| 型號： | LM1246 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| 中文描述： | 150 MHz的I2C兼容的RGB前置放大器512個字符OSD光盤，512個字符RAM和4 DAC的內(nèi)置 |
| 文件頁數(shù)： | 25/51頁 |
| 文件大?。?/td> | 2794K |
| 代理商： | LM1246 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當(dāng)前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁
OSD Generator Operation
(Continued)
Microcontroller Interface
The microcontroller interfaces to the LM1246 preamp using
the I
2
C compatible interface. The protocol of the interface
begins with a Start Pulse followed by a byte comprised of a
7-bit Slave Device Address and a Read/Write bit. Since the
first byte is composed of both the address and the read/write
bit, the address of the LM1246 for writing is 0xBA
(10111010b)
and
the
address
(10111011b). The development software provided by Na-
tional Semiconductor will automatically take care of the dif-
ference between the read and write addresses if the target
address under the communications tab is set to 0xBA.
Fig-
ures 25, 26
show a write and read sequence on the I
2
C
compatible interface.
for
reading
is
0xBB
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 Write Address, 0xBA, is sent next.
Each byte that is sent is followed by an acknowledge bit.
When SCL is high, the master will release the SDA line. The
slave must pull SDA low to acknowledge. The register to be
written to is next sent in two bytes, the least significant byte
being sent first. The master can then send the data, which
consists of one or more bytes. Each data byte is followed by
an acknowledge bit. If more than one data byte is sent, the
data will increment to the next address location. See
Figure
25
.
READ SEQUENCE
Read sequences are comprised of two I2C compatible trans-
fer sequences: The first is a write sequence that only trans-
fers the two byte address to be accessed. The second is a
read sequence that starts at the address transferred in the
previous address only write access and increments to the
next address upon every data byte read. This is shown in
Figure 26
. The write sequence consists of the Start Pulse,
the Slave Device Write Address (0xBA), and the Acknowl-
edge bit; the next byte is the least significant byte of the
address to be accessed, followed by its Acknowledge bit.
This is then followed by a byte containing the most signifi-
cant address byte, followed by its Acknowledge bit. Then a
Stop bit indicates the end of the address only write access.
Next the read data access will be performed beginning with
the Start Pulse, the Slave Device Read Address (0xBB), and
the Acknowledge bit. The next 8 bits will be the read data
driven out by the LM1246 preamp associated with the ad-
dress indicated by the two address bytes. Subsequent read
data bytes will correspond to the next increment address
locations. Data should only be read from the LM1246 when
both OSD windows and the Fade In/ Fade Out are disabled.
20068537
FIGURE 24. Bordering
L
www.national.com
25
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM1246NA | 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM124AE | Low Power Quad Operational Amplifiers |
| LM124AJLQMLV | Low Power Quad Operational Amplifiers |
| LM124AWG | Low Power Quad Operational Amplifiers |
| LM124AWGLQMLV | Low Power Quad Operational Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1246AAA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1246AAC/NA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC 150MHZ RGB PREAMP 1246 DIP24 |
| LM1246AAC/NA/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 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機，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 |
| LM1246NA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1247 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。